Codestin Search App

Enseignement/Teaching "The questions of the students are often the source of new research. They often ask profound questions that I've thought about at times and then given up on, so to speak, for a while. It wouldn't do me any harm to think about them again and see if I can go any further now. The students may not be able to see the thing I want to answer, or the subtleties I want to think about, but they remind me of a problem by asking questions in the neighborhood of that problem. It's not so easy to remind yourself of these things.
...
Finally, I said that I couldn't see how anyone could be educated by this self-propagating system in which people pass exams, and teach others to pass exams, but nobody knows anything.
Richard Feynman, Surely You're Joking, Mr. Feynman! Adventures of a Curious Character (1985)

Master 2 EEA

Stroboscopic record of a quartz tuning fork vibration
(fundamental 32768 Hz mode), inspired by
A. Castellanos-Gomez, European J. Phys. 34 (1), 2013

Project:
- Project presentation (Oct. 13, 2025)
- Project presentation (Dec. 9, 2025)
7 lessons and laboratory sessions on embedded systems (syllabus):

lesson 1 on controlling hardware from userspace , reminders on Buildroot/cross-compilation, hardware v.s virtual memory addressing,
lesson 2 on kernel modules communicating through /dev,
lesson 3 on methods provided by the Linux kernel (mutex/semaphore/spinlock) and platform interface (/sys/bus/platform)
lesson 4 on the devicetree (see also the excellent article in French by Thomas Petazzoni on this topic published in OpenSilicium) with a video of the lesson video (in French) recorded in Sept. 2020,
lesson 5 on PS/PL interaction and configuring the FPGA of the Zynq from GNU/Linux. Archive of the project for configuring Vivado for the Red Pitaya (launch.sh script) and video (in French) recorded in September 2020,
lesson 6 on the XADC peripheral of the Zynq and Industrial Input/Output (IIO) interface, and associated archive
lesson 7 on interrupt handling and transfering signals from the Linux kernel to userspace with a kernel module sample and userspace application handling the signal.
lesson 8 on the CPU/FPGA co-design framework oscimpDigital on Red Pitaya.
lesson 9 on real time extension of Linux (Xenomai, PREEMPT_RT) and AMP demonstration on the Raspberry Pi 4.
Characterizing the Red Pitaya (STEMLab 14) radiofrequency analog to digital converters and their noise level, accessed the using oscimpDigital joint FPGA/CPU (PL/PS) development framework. See A.C. Càrdenas-Olaya & al, Phase Noise and Frequency Stability of the Red-Pitaya Internal PLL, IEEE Trans. on Ultrasonics, Ferroelectrics, and Frequency Control (T-UFFC) vol 66, num 2, pp.412-416 (2019) for more information.
Examen 2016 avec sa correction, examen 2017 avec sa correction et son archive, examen 2018 avec sa correction, examen 2019 avec sa correction, examen 2020 avec sa correction, examen 2021 [1] avec sa correction et son archive, et un second examen de 2021 avec son archive. Examen 2022 avec correction, examen 2023 avec correction, examen 2024 avec correction. Examen 2025 et sa correction.

make linux-menuconfig

/PWM

│ Symbol: PWM [=y]
│ Type : bool
│ Prompt: Pulse-Width Modulation (PWM) Support
│ Location:
│ (1) -> Device Drivers
│ Defined at drivers/pwm/Kconfig:1
│ Selected by [n]:
│ - S3C24XX_PWM [=n] && PLAT_SAMSUNG [=n] && SAMSUNG_ATAGS [=n]
│ - FB_SSD1307 [=n] && HAS_IOMEM [=y] && FB [=y] && I2C [=y] && OF [=y] && (GPIOLIB [=y]

make

ERROR: modpost: "of_pwm_xlate_with_flags" ... undefined!

~~Micro-acoustics (acoustic wave in solids~~, 2018--2023)

Gravimetric sensors: Quartz Crystal Microbalance (QCM)
Wireless measurement of passive cooperative targets and the video [in French] of the associated oral presentation (2020), demonstrating the interrogation of SAW resonators. Similar material was used to support a presentation [in English] at IMS Laboratory in Bordeaux (France) in 2022.
First laboratory session syllabus aimed at measuring the displacement field of a quartz tuning fork prong using a stroboscopic imaging setup. The slides displayed during the lab session presentation (in French)
Second laboratory session syllabius and its associated preliminary preparation document on the electrical characterization of radiofrequency devices. The video presenting the use of a vector network analyzer and how the data to be processed are collected, as shown in the correction of the laboratory session (2022).
Examen (2018-2019) et sa solution.
Examen (2019-2020).
Examen (2020-2021).
Examen (2021-2022).

4 cours sur SOPC par Gwenhael Goavec :

Enoncé et les archives du TP.
Présentations sur le Zynq et la qualification par compteur dans le FPGA des latences de Linux v.s Xenomai lors des deux premières séances.
Les deux dernières séances s'appuient sur le dépôt github de Oscillator IMP.

NOAA19 POES weather satellite reception. All NOAA POES satellite emissions were terminated in August 2025

M1 EEA

Master 1 EEA

Project

PiFM emission and RTL-SDR reception

MAX2771-based GNSS signal acquisition and processing

OBSOLETE old project (2020-2023) : Presentation of the Master1 (M1) project relying on Buildroot to generate a cross-compilation toolchain and a GNU/Linux operating system dedicated to the Raspberry Pi 4 executing GNU Radio following the precepts described in this documentation and detailed in this article [French].
- First week: document describing Buildroot installation targeted to the Raspberry Pi4 (RPi4), network configuration and concluding with installing GNU Radio on the RPi4
- second week: document describing the use of GNU Radio on the PC and RPi4, making sure the versions are consistent
- third week: document describing the design (schematic, routing, mechanical design, BoM) of a dedicated AD9954 DDS based radiofrequency synthesizer as a daughter board to the RPPi4
- fourth week: document describing the use of the RPi4 as a radiofrequency signal source for characterizing a radiofrequency filter in transmission mode using GNU Radio running on the RPi4.
OBSOLÈTE ancien projet (2015-2019) : circuit, dont les briques de base sont abordées en TP (STM32F4)) en vue de finaliser le montage et son exploitation lors du projet.
Schéma et board du circuit (CADSoft Eagle). Transparents d'introduction du projet.

Embedded digital electronics, 1st semester:

Documentation

tool for programming the STM32

~~Séance 1 : assembly language on the Atmega32U4 and associated laboratory session syllabus, as well as the library needed for USB communication as a subsection of LUFA,~~
Lesson 1: Prerequisites and outline (obsolete: Rappels L3 et prérequis in French)
Lab session1: reminder on the Atmega32U4 and how to use Makefile to automate compilation with gcc
Lesson 2: ASCII, processor architecture and peripherals) (obsolete ASCII, architecture du microcontroleur, adresse des périphériques. in French).
Lab sessions using a dedicated STM32F103 board and the STM32F100 of the STM32VL-Discovery board are described in this document using the software remplates available on Github.
Lesson 3: gcc compiler details (obsolete: compilateur gcc. in French)
Lesson 4: libraries: newlib and subs + emulators and software architecture (obsolete: bibliothèque newlib et stubs, émulateurs.): system call skeleton to be filled to write to the STM32 serial port from stdio.
Lesson 5: communication busses (obsolete: bus de communication)
Lesson 6: integers/floating point numbers, arithmetics. (obsolete: nombres entiers et flottants, arithmétique. et la video of the oral presentation supporting this lesson).
Lesson 7: interrupt, data acquisition and sampling rate measurement, FIR filtering (obsolete: interruptions, acquisition de données et calcul de la fréquence d'échantillonnage, et filtre FIR, and the video of the presentation supporting this lesson).
Lesson 8: LoRa, MQTT, Base64 encoding.
Last lab session 2021 on the Newton set and complex number fixed point arithmetic.
Examen (2016) et sa correction ainsi que session 2 (2016) et sa correction. Examen 2017 et sa correction. Examen 2018 et sa correction ainsi que son archive (version informatique) et examen (version EEA) Dec. 2018 et sa correction, Dec. 2019 et sa correction, examen 2020 avec sa correction. The 2021 exam with its correction. The 2022 exam with its correction. The 2023 exam with its correction. The 2024 exam with its correction. The 2025 exam with its correction.

Embedded digital electronics, 2nd semester:

lesson 1 slides and the video (2021) (obsolete slides in French): FreeRTOS/STM32 and the lab session syllabus (old obsolete version in French) which requires the associated git repository.
lesson 2 slides and the video (2021) on mutex and semaphores for sharing resources between tasks and threads.
lesson 3 slides and the video (2021) on the dining philosopher problem and solution using tasks and mutex, focusing on emulator execution
lesson 4 slides and the video (2021) on embedded GNU/Linux, benefits and drawbacks, networking and hardware access from userspace -- document (version obsolète en français) describing CGI script for controlling hardware from a web server
laboratory sessions on the Red Pitaya rely on this syllabus
lesson 5 slides on networking,
lesson 6 slides and the video (2021): hardware memory and virtual memory, accessing hardware from userspace through /dev/mem and other pseudo-files in /sys
lesson 7: Linux kernel module, kernel side of /dev communication, Symmetric v.s Asymmetric Multiprocessing (AMP)
the last laboratory session on AMP on the Raspberry Pi 4 described at this github repository
Examen et sa correction (2014), examen 2015 et sa solution, examen 2017 incluant sa correction. Examen Juin 2018 et sa correction ainsi que son archive, examen 2019 avec sa correction, examen 2021 avec sa correction, 2022 avec correction, 2023 avec sa correction, 2024 with its correction, 2025 with its correction.

Antennes, 2nd semestre (2015, 2016):

Transparents du cours et TP antennes, ainsi que le sujet du devoir à faire à chez soi pour donner lieu à la notation du module.

L3 EEA

Bachelor/Licence 3 EEA

SSTV images transmitted from the ISS and collected using a DVB-T dongle: FM demodulation from GNURadio connected to qsstv for image processing and display (April 2018). Template for the First French GNU Radio days describing the experimental setup.

SSTV images transmitted from the ISS and collected using a DVB-T dongle in August 2020, and waterfall exhibiting the Doppler shift induced by the motion of the space station along its orbit.

8 lessons on wireless digital communication using software defined radio
1. video of lesson 1 (1.5 h) -- Introduction, hardware, AM (aeronautical communication)
2. video of lesson 2 (1.5 h) -- Modulations (FM, PM) -- application to broadcast commercial FM (and NOAA LEO satellite reception)
3. video of lesson 3 (1.0 h) -- Division Multiple Access, application to receiving multiple FM stations and POCSAG decoding using external software. GRC flowgraphs: dual FM receiver flowgraph, single POCSAG and multiple POCSAG channel decoding.
4. video of lesson 4 (1.43 h) -- CDMA and GPS decoding. I forgot to mention the link with datasets collected with a RTL-SDR DVB-T dongle at 1.57542 GHz carrier frequency and a rate of 1.023 MS/s fitted with an active GPS antenna polarized by a 5-V bias T.
5. video of lesson 5 (45 min) -- pulse compression and link budget
6. video of lesson 6 (1h40) -- antenna basics
7. video of lesson 7 (45 min) -- channel capacity, Shannon theorem
8. video of lesson 8 (1h40) -- synchronization and digital processing of radiofrequency signals. GRC flowgraphs: BPSK and QPSK simulation and RDS decoding (EN50067 RDS standard)
9. video of lesson 9 (1h20) on internet protocol (IP) and the associated tools (wireshark, tcpdump ...).
- TP antennes avec modélisation du diagramme de rayonnement du dipole dans le vide, du dipole sur un plan de masse, du monopole, et du dipole avec un réflecteur.
- Examen 2015 portant sur les transmission numériques sur porteuse radiofréquence et sur internet,
- Examen 2016 sur le décodage de trames RS232 transmises en ASK et FSK sur porteuse radiofréquence, ainsi que décodage des images en modulation d'amplitude sur porteuse audiofréquence (format APT des satellites NOAA POES)
- Examen 2017 avec solutions.
- Examen 2018 avec solutions.
- Examen 2019 avec solutions.
- Examen 2020 avec solution.
- Examen 2021 avec sa correction.
- Examen 2022 avec sa correction.
- Examen 2023 avec sa correction.
- Examen 2024 avec sa correction.
- Examen 2024 avec sa correction.
Acquisition du 13 Mars 2016 (NOAA19, R820T2 DVB-T) et image Meteosat pour référence.

POCSAG decoding

POCSAG decoding (with scope)
Projet (2nd semestre) :

Document concernant le déroulement global du projet, transparents de présentation du projet (séance 1) avec sa video (2021),
2020 : Mise en oeuvre du projet sur émulateur (simavr) en l'absence de plateforme matérielle pour le développement.
Archive : exemple de présentation (Persistence of Vision sur Atmega32U4) de projet réalisé en 2014-2015.

Introduction aux microcontroleurs (Électronique Programmable 1) :
1. TP0 (commandes unix et C).
2. TP1/2 (bases de l'Atmega32U4) en PDF et HTML and its translation to English.
Introduction aux microcontroleurs (Électronique Programmable 2) :
1. TD0 sur Makefile et compilation séparée, et vidéo associée
2. TP3 : Makefile et communication USB par LUFA (nécessite la bibliothèque associée) en PDF et HTML (and its English translation).
3. TD1 sur les interruptions dont la vidéo (1h) de cours a été enregistrée (2021) suivi de ...
4. ... TP4 (interruptions de l'Atmega32U4) en PDF et HTML.
5. TD2 sur les bus de communications asynchrones et synchrones et sa video (2021), suivi de son ...
6. ... TP sur la communication sur bus synchrone (SPI) avec application au capteur de température LM74, à la communication avec carte SD et exemple d'affichage sur écran LCD en PDF et HTML.
7. TD pointeurs et sa video (2021).
8. TP sur la communication sur bus I2C et application au capteur de température LM75 : la communication sur bus I2C peut nécessiter cette bibliothèque.
9. TD sur le lien entre électronique, logique et arithmétique, incluant les transparents sur les masques/décalages et leur utilisation pour la communication par trames ASCII, video (2021)
10. TP sur la communication asynchrone (RS232) et ...
11. Cours/TD sur les convertisseurs analogiques numériques (ADC) et la video correspondante. Les deux articles cités dans la présentation : PYB sur les convertisseurs rapides et Carolina sur la RedPitaya et l'impact de l'oscillateur local.
12. TP (ADC) en PDF et HTML.
13. TP8 sur les modes veille/consommation en PDF et HTML
14. Obsolète : TP afficheur 7-segments, GPIO et interruptions, en PDF et HTML.
15. Examen de TP 2015, examen 2016 et sa correction, examen 2017 et sa correction, examen 2018 et sa correction, examen 2019 et sa correction ainsi que l'archive associée, examen 2020 et archive associée, examen 2021 avec sa correction. examen 2022 avec sa correction. examen 2023 avec sa correction. examen 2024 avec sa correction, ainsi que la seconde session et sa correction. examen 2025 et sa correction.

ENSTA Paris

ENSTA Paris (2025-)

Ressources : procédure d'installation (Windows/macOS/GNU Linux) et jeux de données (FM et GNSS).
Transparents de la première séance
Transparents de la deuxième séance
Transparents de la troisième séance
Transparents de la quatrième séance
Transparents de la cinquième séance
Transparents de la sixième séance (transparents FOSDEM 2026)

LPRO IUT Ville d'Avray

IUT Ville d'Avray (2018-)

Introduction à la radio logicielle (Software Defined Radio -- SDR) et support de TP (-2020) sur la caractérisation de l'entrée analogique des récepteurs DVB-T.
Pour 2021, groupe 1 : video de cours du matin et video de TP du matin, puis video de cours de l'après-midi et video de TP de l'après-midi. Une archive des chaines de traitements pour GNU Radio 3.8.
Pour 2021, groupe 2 : video de cours du matin et video de TP du matin, puis video de cours de l'après-midi et video de TP de l'après-midi. Une archive des chaines de traitements pour GNU Radio 3.8.

ISTA

ISTA Bamako (2021-)

Transparents de la présentation du 04/12/2021, et vidéos de la première partie de l'intervention suivie de la seconde partie de l'intervention. Script GNU Radio Companion pour se familiariser avec l'interface graphique, et pour la caractéerisation d'un filtre passe bas avec sortie sur carte son.
Transparents de la deuxièeme présentation du 18/12/2021 et vidéos de la première partie de l'intervention suivie de la seconde partie de l'intervention.
Transparents de la troisièeme présentation du 12/02/2022 et vidéos de la première partie de l'intervention suivie de la seconde partie de l'intervention.
Transparents de la quatrièeme présentation du 18/06/2022 et vidéos de la première partie de l'intervention suivie de la seconde partie de l'intervention avec ses exemples pour GNU Radio Companion 3.10 (0MQ Publish, 0MQ Subscribe, Block Python, Thread exécutant un serveur TCP/IP, décodage POCSAG par multimon-ng (1 canal) décodage POCSAG par multimon-ng (4 canaux) )

Resources

Ressources

Documentation describing the installation of the tool for programming the STM32 on the board used during the Master1 laboratory sessions.

Configuration buildroot (version obslète en français) et environnement de développement pour installer GNU/Linux sur processeur ARM (Zynq sur plateforme Red Pitaya)
OBSOLETE pour cause de changement de plateforme de développement : configuration buildroot et environnement de développement buildroot pour installer GNU/Linux sur processeur ARM (Sunxi A13 sur Olinuxino A13-micro), accès matériel depuis l'espace utilisateur, introduction aux modules noyau puis gestion des interruptions sous Linux
Digital Elevation Model (DEM) using a consumer grade drone, MicMac and merging data with Ground Penetrating RADAR datasets
Displaying Ground Penetrating RADAR traces using OpendTect, and shifting traces to account for topographic variations.

ENSMM

ENSMM (2008-2017)

Archives des anciens TPs :
1. 2008-2009 : TP1 sur la programmation en assembleur sur MSP430 et TP2 sur uCLinux sur Coldfire
2. 2009-2010 : TP1 sur la programmation en C sur MSP430 suivi de TP2 sur le traitement du signal sur signaux acquis par MSP430, et mise à jour du TP sur uCLinux sur Coldfire).
3. En 2014, j'ai remplacé le MSP430 par le STM32 dont je me sers au quotidien : le TP d'introduction suivi du traitement du signal (filtrage et FFT).
Examens 2008-2009, 2009-2010 et 2010-2011, 2011-2012, 2012-2013, 2013-2014, 2014-2015, 2015-2016 et sa solution, 2016-2017.

Ground Penetrating RADAR (GPR)

A list of appearances of Ground Penetrating RADAR (GPR) on television, most usually erroneous, or yet another reason not to trust television. Ground Penetrating RADAR in

Demonstration that ice is transparent to microwaves

An advertisement stating that GSSI's GPR is used in Law & Order Special Victims Unit (S05E09: Control) so we start this list with a realistic depiction of GPR.
Criminal Minds S01E14 (2006) (starting at 1365 seconds) with a beeping screen when the skeleton is seen. This reference was identified after reading From Criminal Minds to CSI: the rise of Ground Penetrating Radar in clandestine investigations (Aug. 2019).
a radar profile starts Millennium (S02E15: Owls) and is actually not too bad. The radargram is again shown briefly on a screen later in the same episode.
Columbo (Columbo likes the night life, end) looks like they are considering a SAR solution since even though the GPR is only moved in one direction, a 2-D image is generated.
NCIS (episode 9, season 1, 31 min. from the beginning).
CSI NY (episode 20, season 6, 1 min. 40 sec. from the beginning and episode 20, season 2).
The newer seasons of the series (Season 14, Episode 18) is hardly better, with a radargram scrolling from top to bottom.
CSI Miami (season 4, episode 18 -- Double Jeopardy -- and season 6, episode 18) is correct in the script but not in the image (shows a gun buried in concrete, but the actor speaks of a hyperbolic reflection, so ... half correct).
Despite an initial attempt to get the science right in Bones (season 1, episode 7, 34 min 11 sec), the producers seem to have thought that the audience was not up to the task of thinking and reverted to the same idiocy as the other series (Bones (season 5, episode 1, 5 min. 38 sec) in which GPR even allows for identifying the material a reflector is made of.
X-Files (season 1, epidosde 20) has an episode with a brief scene using GPR plotting on paper and a display on an echography-like screen not showing much other than noise (as observed in real life ? but why the cone-shaped field of view ? Scully: "An experienced operator attempts to differentiate if the signal is a body or is stone or a hole in the ground.").
As opposed to the statement on the GSSI web page, I have not found reference to GPR in Jurassik Park, although there is a scene using seismic in which they detect centimeter-scale bones using meter-long waves (but then ... I have no expertise with seismic ...). I am greatful though to the GSSI Marketing Communications Manager for kindly providing the necessary information for locating the episode of Crossing Jordan, as stated on the GSSI web page and MTI web sites, for a brief reference to GPR and what looks like an actual, although static, radargram on the display.
Hawaii Five-0 Season 2, Episode 7 (20 min. from beginning) needs 3 desktop LCD screens to display radargrams and beeps when bodies are "detected".
Sanctuary (season 03, episode 16) does not bother showing the instrument but just mentions its existence.
Season 1, Episode 8 (620 seconds from beginning) of La Casa de Papel (Money Heist) -- in French here -- mentions GPR for detecting tunnels buried 15-meters deep but not actual hardware shown.
One "movie" refers to GPR, Return to House on Haunted Hill, but beyond exhibiting an inductively coupled metal detector, the movie is so bad that I did not bother checking if the GPR is actually used to find cavities.
In the same vein, Flashpoint ("One Wrong Move") episode 14 of season 2, with a metal detector and some stuff glued to the coil.
Lost Gold of WW2 (s01e06) (startingn at 405 s) is a real GPR radargram (finally !).
Le Bureau des Légendes (season04, episode 5) exhibits the use of Through-the-Wall RADAR, closely related to GPR. While the depiction of the SAR measurement when scanning the radar on the wall seems accurate, the image is not, nor is the vertical resolution nor is the time refresh rate (the actor would have to scan the whole wall again for an updated image).
In the "litterature", Dan Brown's Deception Point mentions GPR p.329 of the ebook version (Simon and Schuster, 2001): "Tolland helped her unpack the Ground Penetrating Radar and position it on the ice. The instrument looked like three miniature snowplow blades that had been affixed in parallel to an aluminum frame. The entire device was no more than a yard long and was connected by cables to a current attenuator and a marine battery on the sled.". So far so good, but then "Mike, I need to align the GPR transmitter with the meteorite site [...] All the work is in setup. The actual shot takes only a second." Wish it were ...
Real life GPR measurement in the documentary Mont-Saint-Michel -- Le labyrinthe de l'archange on the French/German ARTE channel, with Christian Camerlynck (METIS lab., UPMC, Paris) measuring church pillars.
Documentary excerpt, on the French/German ARTE channel, demonstrating the use of GPR in Petra (Jordan) for mapping underground structures.
French news (August 2024) relating an attempt to locate a buried body.

Research

Expertise (?!) in the development of passive wireless acoustic transducers acting as sensors, with the SENSeOR company and the Time and Frequency department of the FEMTO-ST institute (Besançon, France), focuses on bulk- and surface-acoustic transducers and the associated RADAR-like electronics systems for the development of passive sensors interrogated through a wireless radiofrequency link (see one of the latest presentations I gave on this topic). Previous activities (performed in IMEC, Leuven, Belgium, continued at FEMTO-ST) were concerned with the combination of Love mode surface acoustic wave sensors (SAW) [slides in French: presented 11/2006 at ENSL, France] (video of the presentation in French) and surface plasmon resonance (SPR) as well as quartz crystal microbalance (QCM) and atomic force microscopy (AFM) combination. Older work performed during my PhD includes noise analysis in a chaotic electronic circuit (Chua's circuit) and manipulation of nano/micrometric objects with AFM with force feedback (inclusion of an AFM in an SEM). I obtained my habilitation (HDR) in 2010 (manuscript and slides). I am currently an associate professor employed by the Université de Franche-Comté in Besançon, France, located at the Time and Frequency department of FEMTO-ST for my research activities. Following the 3-month visit to Pr. M Sato's laboratory in CNEAS (Sendai, Japan) end of 2017, my activities have shifted towards (passive) RADAR and phased antenna array processing, still applied to passive acoustic sensor cooperative targets.

J.-M Friedt
Simulation de processus nucléaires au moyen de Geant4 : fluorescence X et détection de particules cosmiques
soumis Hackable 67 (Jul-Aug 2026)

J.-M Friedt
Au-delà de GPS : comprendre le système de navigation Galileo et ses modulations BOC
soumis Hackable 65 (Mar-Apr 2026)

J.-M Friedt
Very low frequency (VLF) time and frequency transfer signal analysis using KiwiSDR recordings
FOSDEM SDR/DSP devroom (2026)
slides

J.-M Friedt
MAX2771 broadband SDR: impact of low bit resolution and application to passive radar measurements
FOSDEM SDR/DSP devroom (2026)
slides

J.-M Friedt
Débugger un système embarqué avec GDB et JTAG : mauvais élèves et le boundary scan
Hackable 64 (Jan-Feb 2026)

J.-M Friedt, É. Bernard, F. Tolle
Sub-centimeter position measurements in the Ny-Ålesund area: from PPP to RTK GNSS
Ny-Ålesund Glaciology Flagship Workshop (Oslo, Oct. 2025)
slides

J.-M Friedt
Débugger un système embarqué, virtuel ou réel, au moyen de GDB et JTAG
Hackable 62 (Sept.-Oct. 2025)

J.-M Friedt
Passive and active RADAR using Software Defined Radio
WHY2025 (What Hackers Yearn for), Nederlands (August 2025)
slides
video of the presentation.

J.-M Friedt
Sonder un signal différentiel avec un oscilloscope
Hackable 61 (Juillet-Aout 2025)

É. Bernard, J.-M Friedt, E. Kuschel , A. Prokop , F. Tolle, M. Griselin
Modern evolution of an Arctic glacier forefield: the role of icings on shaping the hydrological network
Manuscript published in Permafrost and Periglacial Processes (2025)
(doi: https://doi.org/10.1002/ppp.2281)

J.-M Friedt
TUT-07: Software Defined Radio in the context of stable time and frequency signal generation and dissemination
Joint EFTF/IFCS 2025 (Querétaro, Mexico)
slides of the presentation and associated GNU Radio flowcharts/dataset.

J.-M Friedt, C. Plantard
Sub-picosecond Software Defined Radio receiver synchronization for multi-radiofrequency band time and frequency transfer
Joint EFTF/IFCS 2025 (Querétaro, Mexico)
proceeding and slides of the presentation.

J.-M Friedt
Mise en œuvre d'un serveur NTRIP pour la mesure de position centimétriqe : qu'est-ce que l'altitude ?
Hackable 60 (Mai-Juin 2025)

J.-M Friedt, V. Luzet, V. Soumann, N. Nief, B. Segues, G. Pucheu, J.-S. Dehez, J.-R. Ordonez-Varela, F. Chérioux
Specific Detection of BTEX Contamination in Water Using a π-Hole-Catching SAW Sensor
manuscript published in ACS Omega (March 2025)

W. Wang, M. Baranski, Y. Jin, R. Salut, D. Belharet, J.-M. Friedt, Y. Pan, Y. Xiang, F. Xuan, A. Khelif, S. Benchabane✝
Experimental realization of on-chip surface acoustic wave metasurfaces at sub-GHz
Advanced Science (2025)
manuscript and supplementary materials

J.-M Friedt, H. Boeglen
Communication Systems Engineering with GNU Radio: A Hands-on Approach
Wiley (2024), also available on the IEEE web site (2025).

Cover of the book

É. Bernard, J.-M Friedt
Did an extreme weather event have a lasting impact on the snowpack and the yearly mass balance? The example of a small glacial basin observatory in the High Arctic (Brøgger peninsula, Spitsbergen)
Manuscript accepted in Arctic Antarctic and Alpine Research (AAAR, 2025)

J.-M Friedt
Programmation USB sous GNU/Linux : application du FX2LP pour un récepteur de radio logicielle dédié aux signaux de navigation par satellite (2/2)
Hackable 59 (Mars-Avril 2025)
Broadband data transfer over USB for GNU/Linux: 1-2 GHz (L-band) SDR receiver dedicated to GNSS (and other) reception, interfacing with PocketSDR, GNU Radio and gnss-sdr
FOSDEM 2025 including the video of the presentation
slides of the presentation and associated dataset and GNU Radio flowchart for the signal processing demonstration. The video of the presentation is available on the FOSDEM web site.

J.-M Friedt
Signaux et méthodes de distribution de temps (historique et actual), sol et espace
[CyberSkills] Workshop : Distribution sécurisée du Temps et Systèmes spatiaux for videos and slides (Grenoble, 14 Nov. 2024)
slides of the presentation

E. Kuschel, F. Tolle, V. Klaus, U. Laa, A. Prokop, J.-M. Friedt, E. Bernard, C. Zangerl
Meteorological factors control debris slides and debris flows in a high-Arctic glacier basin (Ny-Ålesund, Svalbard)
Geomorphology, 109492 (2024)
openaccess article

J.-M Friedt
Programmation USB sous GNU/Linux : application du FX2LP pour un récepteur de radio logicielle dédié aux signaux de navigation par satellite (1/2)
Hackable 57 (Nov-Dec. 2024)

J.-M Friedt
Conférence European GNU Radio Days 2024 : annonce de GNU Radio 4.0 et tutoriel sur les blocs de traitement en Python
Hackable 57

J.-M Friedt
Distributed coherent SDR systems: GNU Radio rides the White Rabbit
slides presented at European GNU Radio Days 2024
Brandon Pardi, Syeda Tajin Ahmed, Silvia Jonguitud Flores, Warren Flores, Jean-Michel Friedt, Laura L. E. Mears, Bernardo Yáñez Soto, and Roberto C. Andresen Eguiluz
pyQCM-BraTaDio: A tool for visualization, data mining, and modelling of Quartz crystal microbalance with dissipation data
Journal of Open Source Software, 9(99), 6831, https://doi.org/10.21105/joss.06831
published article using the software available at github

J.-M Friedt
Impact of a thin inhomogeneous snow layer on a microwave corner reflector RADAR cross section: consequences for spaceborne remote sensing
IEEE Trans. on Geoscience and Remote Sensing vol 62 (2024)
corrected manuscript
Both reviewers requested that the (basic) raytracing approach to intuitively understand the phenomena be removed from the manuscript... I still believe that, even if naive and not state of the art, the raytracing is useful in understanding the content of the manuscript: see the github repository.

J.-M Friedt
Algèbre linéaire rapide : BLAS, GSL, FFTW3, CUDA et autre bestiaire de manipulation de matrices dans le traitement de signaux de radio logicielle
Hackable 56 (Sept.-Oct. 2024)
manuscrit

J.-M Friedt
Trente ans d'opensource ... pour en arriver là
GNU Linux Magazine France vol. 270 (2024)
manuscrit

É. Bernard, J.-M. Friedt, A. Prokop, F. Tolle, M. Griselin
Is a glacier gone when it looks gone? Subsurface characteristics of high-Arctic ice-cored slopes as evidence of the latest maximum glacier extent
Earth Surface Processes and Landforms (ESPL) (2024)
accepted manuscript, https://doi.org/10.1002/esp.5894

J.-M Friedt
À l'écoute des messages transmis par satellite en orbite basse : Iridium
MISC Hors Série 29 (2024)
manuscrit

C.M. Rivera-Aguilar, M. Callejo, A. Mursa, C. Carlé, R. Vicarini, M. Abdel Hafiz, J-M. Friedt, N. Passilly, and R. Boudot
Operation of a Ramsey-CPT microcell atomic clock with driving current-based power modulation of a VCSEL
manuscript
Applied Physics Letters 124(11) (March 2024)

J.-M Friedt
Software Defined Radio for Time and Frequency applications: example of passive monitoring of TWSTFT and other timing signals (invited)
abstract presented at EFTF 2024
slides presented at EFTF 2024 and embedded video

J.-M Friedt, B. Chupin, M. Lours, É. Meyer, O. Chiu, F. Meyer, W. Daniau, J. Achkar
Results of a Software Defined Radio (SDR) implementation of Two Way Satellite Time and Frequency Transfer (TWSTFT) emitter and receiver system
abstract presented at EFTF 2024
slides presented at EFTF 2024

J. Achkar, É. Meyer, B. Chupin, F. Meyer, O. Chiu, M. Lours, J.-M. Friedt
Two-Way Satellite Time and Frequency Transfer using an opensource, openhardware Software-Defined Radio platform
manuscript presented at 4th URSI AT-RASC, Gran Canaria, 19–24 May 2024

David Rabus, Lilia Arapan, Jean-Michel Friedt, Vincent Luzet, and Frédéric Chérioux
Package-less liquid phase sensing using surface acoustic waves on lithium tantalate oxide
manuscript published in IEEE Trans. UFFC vol.71, num.4, pp.496--505 (April 2024), DOI: 10.1109/TUFFC.2024.3366559

J.-M. Friedt
Covert Ground Based Synthetic Aperture RADAR using a Wi-Fi emitter and SDR receiver
FOSDEM (2024)
slides
video of the presentation

J.-M. Friedt, D. Rabus, L. Arapan, V. Luzet, F. Chérioux
Surface acoustic wave reflective delay line as passive cooperative target for wireless sub-surface sensing in liquid using Ground Penetrating RADAR
IET RADAR Conference 2023 (Chongqing, China)
slides and conference proceeding

J.-M. Friedt
Software Defined Radio (SDR) Passive Radar Implementations
IET RADAR Conference 2023 (Chongqing, China)
slides of the invited presentation

J.-M Friedt, G. Goavec-Merou
Measuring time delays with sub-sampling period resolution: qualification of some COTS SDR RF frontends with sub-100 ps resolution
Software Defined Radio Academy (2023) and extended presentation at GNU Radio Conference 2023
slides and oral presentation recording broadcast during the conference.

J.-M Friedt
Échanges de données pour un traitement distribué : communication par réseau ou entre langages
GNU/Linux Magazine France 267 (Jan-Feb. 2024)
manuscript and its English translation

J.-M Friedt
Synchronisation d'ordinateurs par réseau informatique pour la datation sous GNU Linux : NTP, PTP et GPS sur Raspberry Pi Compute Module 4
Hackable 51 (Nov/Dec 2023)
manuscript

Update 29 Jan. 2025: a new option --ptp_minor_version was introduced in LinuxPTP allowing the Compute Module 4 PTP interface to communicate with the White Rabbit network:
ptp4l -s -m -i eth0 -E -2 --ptp_minor_version 0 --tx_timestamp_timeout 200
resulting in the above chart comparing two White Rabbit slaves and the CM4 acting as a PTP slave on the White Rabbit network.

J.-M Friedt
Du domaine temporel au domaine spectral dans 2,5 kB de mémoire : transformée de Fourier rapide sur Atmega32U4 et quelques subtilités du C
Hackable 49 (July/August 2023)
manuscript

J.-M Friedt
European GNU Radio Days 2023
Hackable 48 (May/June 2023)
manuscript

J.-M Friedt
FreeRTOS dans 2,5 KB de RAM sur Atmega32U4
Hackable 48 (May/June 2023)
manuscript

M. Matusko, I. Ryger, G. Goavec-Merou, J. Millo, C. Lacroûte, É. Carry, J.-M Friedt, M. Delehaye
Fully-digital platform for local ultra-stable optical frequency distribution
Rev. Sci. Instrum volume 94, issue 3 (2023)
accepted manuscript

J.-M Friedt
Exploitation des signaux de référence de navigation par satellite pour un positionnement centimétrique : RTKLib fait appel à Centipède et l'IGN pour afficher dans QGis
Hackable 48 (May/June 2023)
manuscript

J.-M Friedt
Quel temps fera-t-il la semaine prochaine ? Évolution d'un système chaotique simulé en virgule fixe
Hackable 47 (March/April 2023)
manuscript

J.-M Friedt, M. Lours, G. Goavec-Merou, M. Dupont, B. Chupin, O. Chiu, É. Meyer, F. Meyer, J. Achkar
Development of an opensource, openhardware, software-defined radio platform for two-way satellite time and frequency transfer
abstract for IEEE/IFCS 2023 and the associated video of the oral presentation...
... also discussed in the European GNU Radio Days 2023 presentation slides
The video of the on-site presentation recorded in Toyama, Japan

J.-M Friedt, D. Rabus, L. Arapan, V. Luzet, F. Chérioux N. Nief, S. Dehez, J.R Ordonez-Varela
A lithium-tantalate based acoustic reflective delay line for chemical sensing in water
abstract for IEEE/IFCS 2023 and the associated video as well as the poster itself.

W. Daniau, R. Salut, J.-M Friedt, A. Pena, J. Debray, B. Menaert, P. Armand, P. Papet, A. Penarier, P. Nouvel
Experimental demonstration of Surface Acoustic Wave propagation on α-GeO2 for wireless, passive sensor design
abstract for IEEE/IFCS 2023 and the associated video as well as the poster itself and the article for the proceedings.

J.-M Friedt, E. Bernard, M. Griselin
Ground based oblique view photogrammetry and Sentinel1 spaceborne RADAR reflectivity snow melt processes assessment on an Arctic glacier
MDPI Remote Sensing vol. 15 n.7 1858-- (2023)
published manuscript
Elsevier's Cold Regions Science and Technology (CRST) is awarded the prize of the most incompetent editor I have ever met: after 7 months (submitted July 20 2022, answer February 24 2023) the reply for our submission is ``I regret to inform you that we have been unable to secure reviewers willing to review your manuscript and we must therefore reject it.''
MDPI Remote Sensing took three weeks to provide the review after submission and 1 week for acceptance after revision!

J.-M Friedt
Communication LoRa au moyen de RIOT-OS pour la mesure centimétrique par GPS différentiel avec RTKLib
Hackable 45 (Nov-Dec. 2022)
manuscrit Slides for an oral presentation at Eclipse IoT Day Grenoble 2023 and the associated oral presentation streamed by videoconference due to train strikes preventing traveling to Grenoble.

J.-M Friedt
Le temps et son transfert par satellite géostationnaire : réception avec une parabole de télévision et d'une radio logicielle
GNU/Linux Magazine France Hors Série 121 (Oct-Nov. 2022)
manuscrit
J.-M Friedt, G. Goavec-Merou
Passive reception of Two-Way Satellite Time and Frequency Transfer (TWSTFT) signals from a geostationary satellite, or GPS upside down
GNU Radio Conference 2022
slides and the associated Github repository
Manuscript for the proceedings and video of the remote presentation.
Error on slide 26: when computing the time delay *difference* there is no need to consider half the TW difference. Indeed OP-PTB measurement is (OP-sat)+(sat-PTB) and OP-OP ranging is (OP-sat)+(sat-OP) so the difference is ((OP-sat)+(sat-PTB)-((OP-sat)+(sat-OP))=(sat-PTB)-(sat-OP) which is the quantity observed by the SDR receiver. This explains the factor of 2 discrepency, while the fluctuation amplitude is related to the interpolation quality between OP and PTB measurements as published on the BIPM web site.

J.-M Friedt
Le récepteur de radio logicielle RSP1 : 8 MHz de bande passante pour moins de 20 euros
Hackable 44 (Sept.-Oct. 2022)
manuscrit

J.-M Friedt
Intercorrélation par transformée de Fourier rapide sur microcontroleur sous FreeRTOS, et les pointeurs de pointeurs
Hackable 43 pp.4-- (Jul.-Aug. 2022) with its github repository
manuscript
Useful references no longer available on the web: AN3722 from Maxim IC and it associated firmware archive.

J.-M Friedt
RADAR passif bistatique au moyen d'une Raspberry Pi4, d'une radio logicielle et du satellite Sentinel-1
Hackable 41 pp.108--130 (Mar.-Apr. 2022) with its github repository
manuscript

J.-M Friedt
Acquisition sur le terrain, dissémination d'informations et photographies géoréférencées par le Web : qgis2web et QField
GNU/Linux Magazine France 256 (Mars-Avril 2022)
manscript

D. Rabus, F. Lotthammer, J. Degret, L. Arapan, F. Palmino, J.-M. Friedt, F. Cherioux
Degradation of Sub-Micrometer Sensitive Polymer Layers of Acoustic Sensors Exposed to Chlorpyrifos Water-Solution
MDPI Sensors 22(3), 1203 (2022)

J.-M. Friedt, T. Lavarenne
Emitting Hellschreiber from a Raspberry Pi GPIO: combining gr-hellschreiber with gr-rpitx GNU Radio running on an embedded board as emitter
FOSDEM 2022
slides of the presentation and video of the oral presentation, associated Github repository.

W. Feng, J.-M. Friedt, P. Wan
SDR-implemented passive bistatic SAR system using Sentinel-1 signal and its experiment results
MDPI Remote Sensing vol. 14, num. 1, pp.221- (2022)
manuscript
J.-M Friedt, W. Feng
Passive bistatic RADAR using spaceborne Sentinel1 non-cooperative source, a B210 and a Raspberry Pi4
slides of the presentation at GNU Radio Conference 2021 (Charlotte, USA/virtual) (local copy of the video)
Associated github repository

J.-M Friedt, M. Paquit
Passive RADAR interrogation of passive cooperative targets: long range illumination of SAW delay lines using high power sources
slides of the accepted presentation at SAW Symposium 2021 (Dresden, Germany/virtual) and associated video of the oral presentation

É. Bernard, J.-M. Friedt, M. Griselin
Snowcover Survey over an Arctic Glacier Forefield: Contribution of Photogrammetry to Identify "Icing" Variability and Processes
manuscript published in MDPI Remote Sensing 13 (10), 1978 (2021) and uploaded to arxiv.

J.-M Friedt
Processing raw (level0) Sentinel1 spaceborne RADAR signals
European GNU Radio Days 2021, slides of the presentation (video) with its github repository

J.-M Friedt, É. Courjaud
gr-rpitx: GNU Radio compatible general purpose SDR emitter using the Raspberry Pi
Proc. European GNU Radio Days (2021) and video of the presentation.

J.-M Friedt
Software Defined Radio for time and frequency metrology: demonstration with GNU Radio
slides of the tutorial for IEEE International Frequency Control Symposium (IFCS) 2021 and video of the presentation.
Not unrelated, our tutorial for the European Frequency and Time Symposium (EFTS) is available as part1 followed by part2 and finally part3,

J.-M Friedt
Analyse des données brutes des RADARs spatioportés Sentinel 1 : traitement des signaux radiofréquences
Hackable 39 pp.42-- (Oct.-Dec. 2021)

manuscript and Github repository

J.-M Friedt
``Je veux ma maquette de satellite'' : analyse du format G3DB d'objets 3D en vue de leur impression
GNU/Linux Magazine France 250 (Juillet-Aout 2021)
manuscript and Github repository

S. Mukherjee, J. Millo, B. Marechal, S. Denis, G. Goavec-Merou, J.-M. Friedt, Y. Kersalé, C. Lacroute
Digital Doppler-cancellation servo for ultra-stable optical frequency dissemination over fiber
manuscript in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control (2021) 10.1109/TUFFC.2021.3125066

D. Rabus, G. Goavec-Merou, G. Cabodevila, F. Meyer, J.-M Friedt
Generating a timing information (1-PPS) from a software defined radio decoding of GPS signals
manuscript and associated slides accepted as oral presentation at the virtual Joint EFTF/IFCS conference (2021)

J.-M Friedt
Les barrages se tordent (de rire) : analyse des images (mal) géoréférencées et par interférométrie RADAR spatioporté
GNU/Linux Magazine France 247 (Avril 2021)
manuscrit

J.-M Friedt
Arithmétique sur divers systèmes embarqués aux ressources contraintes : les nombres à virgule fixe
GNU/Linux Magazine France Hors Série 113 (Mars 2021)
manuscrit

J.-M Friedt, P. Abbé
Parler à un RADAR spatioporté : traitement et analyse des données de Sentinel1
GNU/Linux Magazine France 246 (Mars 2021)
manuscript
Talking to a spaceborne RADAR: signal processing Sentinel1 satellites data
video of the talk and slides of the presentation at the virtual FOSDEM 2021 (Free Software Devroom)

W. Feng, J.-M Friedt
SDR Implemented Ground-based Interferometric Radar for Displacement Measurement
accepted manuscript in IEEE Trans. on Instrumentation and Measurement vol 70, 8502218 (2021), doi: 10.1109/TIM.2021.3069805
It is our belief that the reviewer insisting on adding simulation made the manuscript harder to read and we believe the original manuscript was easier to grasp and more consistent, focusing on the experimental setup and results. This probably follows Avi Loeb's statement in "Extraterrestrial -- The first signal of intelligent life beyond Earth" (2021) that "In many cases, senior scholars wish to make their work nuanced and less accessible to scrutiny. They have learned that sophistication is valued as a trademark of the elite, and many are rewarded accordingly... In academia, rewarding complexity for complexity's sake directs talent and resources in some directions and not others. It can also encourage the isolation of scholarship among a self-identified elite, leading them to disregard the interests of the public that substantially fund their efforts."

A. Samarentsis, A. Pantazis, A. Tsortos, J.-M. Friedt, E. Gizeli
Hybrid sensor device for simultaneous Surface Plasmon Resonance and Surface Acoustic Wave measurements
MDPI Sensors vol 20, page 6177 (2020)
openaccess article written by A. Samarentsis

G. Goavec-Merou, J.-M Friedt
"On ne compile jamais sur la cible embarquée" : Buildroot propose GNU Radio sur Raspberry Pi (et autres)
manuscript published in Hackable 37 (Avril-Mai-Juin 2021)
Porting GNU Radio to Buildroot: application to an embedded digital network analyzer
video of the talk and slides of the presentation at FOSDEM 2021

J.-M Friedt
Décodage par radio logicielle du VOR pour le positionnement sans GPS
manuscript published in Hackable 36 (Jan.-Feb.-Mar. 2021)

J.-M Friedt, W. Feng, D. Rabus, G. Goavec-Merou
Real time GNSS spoofing detection and cancellation on embedded systems using software defined radio
proceedings EuCAP 2021
video of the oral presentation presenting the results achieved with the software released on this github repository.

W. Feng, J.-M Friedt, G. Goavec-Merou, F. Meyer
Software Defined Radio Implemented GPS Spoofing and Its Computationally Efficient Detection and Suppression
manuscript published IEEE Aerospace and Electronic Systems Magazine vol 36 num 3, March 2021

J.-M Friedt, D. Rabus, G. Goavec-Merou
Software defined radio based Global Navigation Satellite System real time spoofing detection and cancellation
GNU Radio Conference 2020 (virtual)
internal seminar video and oral presentation video on top of the slides.
Accepted manuscript for the proceedings.

J.-M Friedt, W. Feng
Software defined radio based Synthetic Aperture noise and OFDM (WiFi) RADAR mapping
GNU Radio Conference 2020
video of an oral presentation on top of the slides.
Accepted manuscript for the proceedings.

J.-M Friedt, S. Ballandras
Capteurs acousto-électriques radiofréquences - modes d'interrogation
Techniques de l'Ingénieur E3212 v2 (2020)
manuscrit

T. Laverenne, J.-M Friedt
Bitstream clock synchronization in an ACARS receiver: porting gr-acars to GNU Radio 3.8
slides for the Software Defined Radio Academy (SDRA) 2020
video of the presentation

É. Carry, J.-M Friedt
Fonctionnement d'un téléphone mobile sous l'eau
Hackable 35 (Oct.-Nov.-Dec. 2020) manuscrit

D. Rabus, L. Arapan, P. Tanguy, J.-M Friedt, F. Chérioux
Sampling frequency fluctuations of the Sensors & Software SPIDAR GPR when probing passive surface aoustic wave delay lines for pollution sensing
IEEE Geoscience and Remote Sensing Letters vol. 19, 3503005 (2021)
manuscript
Lesson learnt from the anonymous reviewer: never ever forget to remove the signal mean value before computing its Hilbert tranform. Thank you reviewer !

J.-M. Friedt
Introduction à l'analyseur de réseau : le NanoVNA pour la caractérisation spectrale de dispositifs radiofréquences
Hackable 36 (Jan.-Feb.-Mar. 2021)
manuscript

J.-M Friedt, W. Feng
Mesure fine de déplacement par RADAR interférométrique à synthèse d'ouverture (InSAR) par radio logicielle (3/3)
GNU/Linux Magazine France 244 (Jan. 2021)
manuscript

J.-M Friedt, W. Feng
Analyse et réalisation d'un RADAR à synthèse d'ouverture (SAR) par radio logicielle (2/3)
GNU/Linux Magazine France 242 (Nov. 2020)
manuscrit

PlutoSDR+B210 active RADAR controlled by a RaspberryPi4 running GNU Radio

J.-M Friedt, W. Feng
Analyse et réalisation d'un RADAR à bruit par radio logicielle (1/3)
GNU/Linux Magazine France 240 (Sept. 2020)
manuscrit
Noise RADAR implementation using software defined radio hardware
slides for the Software Defined Radio Academy (SDRA) 2020
video of the presentation

J.-M Friedt, O. Testault, É. Carry
Dessiner des carrés avec des ronds : simulation d'un ordinateur mécanique en scriptant sous FreeCAD
Hackable 35 (Oct.-Nov.-Dec. 2020) manuscrit

J.-M. Friedt
Émulation d'un circuit comportant un processeur Atmel avec simavr
manuscrit
Hackable 34 (Jul.-Sept. 2020)

J.-M Friedt
Automatiser les tâches de conception de circuit imprimé : greffons pour KiCAD et FreeCAD
GNU/Linux Magazine France 238 (June 2020)
manuscrit

J.-M. Friedt, W. Feng
Anti-leurrage et anti-brouillage de GPS par réseau d'antennes
manuscrit
MISC 110 (Jul.-Aug. 2020)

P. Durdaut, E. Rubiola, J.-M. Friedt, C. Müller, B. Spetzler, C. Kirchhof, D. Meyners, E. Quandt, F. Faupel, J. McCord, R. Knöchel, M. Höft
Fundamental Noise Limits and Sensitivity of Piezoelectrically Driven Magnetoelastic Cantilevers
IEEE Journal of Microelectromechanical Systems vol. 29, n.5, pp. 1347--1361 (Oct. 2020)
manuscript written by P. Durdaut

D. Rabus, J.-M. Friedt, L. Arapan, S. Lamare, M. Baqué , G. Audouin, F. Chérioux
Sub-surface H₂S detection by a Surface Acoustic Wave passive wireless sensor interrogated with a ground penetrating radar
manuscript published in ACS Sensors vol 5, num 4, 1075--1081 (March 2020)
supplementary material
arXiv.org copy of the manuscript.

M. Paquit, L. Arapan, W. Feng, J.-M Friedt
Long range passive RADAR interrogation of subsurface acoustic passive wireless sensors using terrestrial television signals
manuscript published in IEEE Sensors vol 20, num 13, pp. 7156--7160 (July 2020)

J.-M Friedt
Analyse d'un brouilleur GPS
Hackable 33 (Avril-Mai-Juin 2020)
manuscrit

G. Goavec-Merou, P.-Y. Bourgeois, J.-M. Friedt
Platform independent CPU/FPGA co-design: the OscImp-Digital framework
FOSDEM 2020 (Free Software Radio devroom)
video of the presentation

J.-M Friedt, G. Goavec-Merou
Un oscilloscope pour le traitement de signaux radiofréquences : gr-oscilloscope pour GNU Radio 3.7 et 3.8
GNU/Linux Magazine France 234 (Feb. 2020)
manuscrit
Software Defined Radio based scientific instrumentation using SDR frontends and oscilloscopes for fast measurements
FOSDEM 2020 (Free Software Radio devroom)
video of the presentation

W. Feng, J.-M. Friedt, S. Wang, M. Sato
Passive bistatic radar using digital terrestrial television broadcasting signal subsurface target detection
PIERS2019 conference (Dec. 17-20 2019, Xiamen, China)
published manuscript written by W. Feng

J.-M Friedt, É. Carry, O. Testault
Petites antennes réalisées par impression additive : de la conception à la visualisation des diagrammes de rayonnement (en vrai et en virtuel)
Hackable n.31, pp.80-96 (Oct-Nov. 2019)
manuscript

J. Guo, W. Feng, J.-M. Friedt, Q. Zhao, and M. Sato,
A half-cut compact monopole antenna for SFCW radar based concrete wall monitoring with a passive cooperative target
IEEE Geoscience and Remote Sensing Letters vol 17, num6, pp.973-977 (2020)
manuscript and published version (DOI: 10.1109/LGRS.2019.2937968)

J.-M Friedt
European GNU Radio Days 2019
GNU/Linux Magazine France vol 129 (2019)
manuscript

A. Hugeat, J. Bernard, G. Goavec-Merou, P.-Y. Bourgeois, J.-M. Friedt
Filter optimization for real time digital processing of radiofrequency signals: application to oscillator metrology
manuscript published in IEEE Trans. UFFC (2019)
following the poster presentation
A. Hugeat, J. Bernard, J.-M. Friedt, P.-Y. Bourgeois, G. Goavec-Merou
Optimization of Signal Processing Chains: Application to Cascaded Filters
manuscript for the 27th European Signal Processing Conference EUSIPCO (Coruna, Spain), 2019

W. Feng, J.-M. Friedt, G. Nico, S. Wang, G. Martin and M. Sato
Passive Bistatic Ground-Based Synthetic Aperture Radar: Concept, System, and Experiment Results
manuscript published in MDPI Remote Sensing vol. 11 issue 15 (2019)

J.-M Friedt
Développer sur microcontrôleur sans microcontrôleur : les émulateurs
GNU/Linux Magazine France HS 103 (Juillet-Aout 2019)
manuscript

P. Durdaut, A. Kittmann, E. Rubiola, J.-M. Friedt, E. Quandt, R. Knöchel, M. Höft
Noise Analysis and Comparison of Phase- and Frequency-Detecting Readout Systems: Application to SAW Delay Line Magnetic Field Sensor
IEEE Sensors vol 19, number 18, pp.8000--8008 (Sept. 2019), DOI: 10.1109/JSEN.2019.2914965
manuscript written by P. Durdaut, and supplementary> material

Jean-Michel Friedt, Weike Feng, Stéphane Chrétien, Gwenhael Goavec-Merou, Motoyuki Sato
Passive radar for measuring passive sensors: direct signal interference suppression on FPGA using orthogonal matching pursuit and stochastic gradient descent
SPIE Optical Metrology 2019 -- Multimodal Sensing and Artificial Intelligence: Technologies and Applications (Munich, Germany)
manuscript

W. Feng, J.-M. Friedt, G. Nico, G. Martin, M. Sato
Passive bistatic SAR imaging and interferometry by satellite digital TV signal
IEEE IGARSS 2019 (Yokohama, Japan)
manuscript written by W. Feng

W. Feng, J.-M. Friedt, G. Cherniak, Z. Hu, M. Sato
Direct path interference suppression for short range passive bistatic SAR imaging based on atomic norm minimization and Vandermonde decomposition
IET Radar, Sonar and Navigation (2019), 10.1049/iet-rsn.2018.5214
manuscript written by W. Feng
W. Feng, J.-M. Friedt, G. Nico, M. Sato
Three-dimensional ground based imaging radar based on C-band cross-MIMO array and tensor compressive sensing
IEEE Geoscience and Remote Sensing Letters (2019), 10.1109/LGRS.2019.2906077
manuscript written by W. Feng
J.-M Friedt
Quelques éléments théoriques pour aborder la radio logicielle
GNU/Linux Magazine France 224 (Mars 2019)
manuscrit
J.-M Friedt
Matériel pour la radio logicielle
GNU/Linux Magazine France 224 (Mars 2019)
manuscrit
G. Goavec-Merou, J.-M Friedt, F. Meyer
Leurrage du GPS par radio logicielle
MISC HS (Feb. 2019)
manuscript
Spoofing GPS
FOSDEM 2019 (Free Software Radio devroom)
proceeding manuscript, slides of the oral presentation and its video available from the FOSDEM archive.
J.-M Friedt
Decoding Meteor M2: QPSK, Viterbi, Reed Solomon and JPEG
FOSDEM 2019 (Free Software Radio devroom)
proceeding manuscript (translation of the articles in French below to English) & slides
Décodage d'images numériques issues de satellites météorologiques en orbite basse : le protocole LRPT de Meteor-M2 (en 3 parties)
manuscrit Partie 1/3 GNU/Linux Magazine France 226 (Mai 2019) ,
manuscrit Partie 2/3 GNU/Linux Magazine France 227 (Juin 2019), et
manuscrit Partie 3/3 GNU/Linux Magazine France 228 (Juillet-Aout 2019)

P. Durdaut, M. Höft, J.-M. Friedt, E. Rubiola
Equivalence of Open-Loop and Closed-Loop Operation of SAW Resonators and Delay Lines
MDPI Sensors, written by P. Durdaut (2019)

A.C. Càrdenas-Olaya, C. Calosso, J.-M. Friedt, S. Micalizio, E. Rubiola
Phase Noise and Frequency Stability of the Red-Pitaya Internal PLL
manuscript written by C. Cardenas, IEEE Trans. on Ultrasonics, Ferroelectrics, and Frequency Control (T-UFFC) vol 66, num 2, pp.412-416 (2019)

F. Gégot, J.-M Friedt, W. Feng, G. Goavec-Merou, G. Martin, M. Sato
Noise RADAR and passive RADAR interrogation of passive wireless sensors
SAW Symposium 2018 (Dresden, Germany)
slides of the presentation

PlutoSDR recording of 8 FM stations: initial settings using
too narrow filter transition widths exceed available processing
power (on purpose), yielding discontinous sound. Increasing the
transition bandwidth allows for continuous sound output.

W. Feng, J.-M Friedt, G. Goavec-Merou, M. Sato
Passive radar delay and angle of arrival measurements of multiple acoustic delay lines used as passive sensors
IEEE Sensors vol 19, num 2, pp. 594--602 (Jan. 2019), doi: 10.1109/JSEN.2018.2872867
manuscript
J.-M Friedt
Quelques éléments de traitement de signaux échantillonnés en temps discret avec GNU Radio
GNU/Linux Magazine France 221 (Dec. 2018)
manuscript English translation
Élément bibliographique aidant à comprendre le traitement du signal effectué sur les données acquises par Airspy (extrait de F.J. Harris, "Multirate Signal Processing for Communication Systems")
J.-M Friedt
Interfaçage d'une radiocommande de modélisme à un simulateur de vol
Hackable 26 (Sept-Oct. 2018), pp.30--43
manuscript
É. Bernard, J.-M Friedt, S. Schiavone, F. Tolle, M. Griselin
Assessment of periglacial response to increased runoff. An Arctic hydrosystem bears witness
Land Degradation and Development, vol 19 num 10 pp3709-3720 (2018)
manuscript published online (Sept. 2018)
W. Feng, J.-M. Friedt, Z. Hu, G. Cherniak, M. Sato
WiFi-based imaging for GPR applications: fundamental study and experimental results
IET International RADAR conference (Nanjing, China, 2018)
proceeding
article published in IET Journal of Engineering (2019) (doi: 10.1049/joe.2019.0209)
J.- M Friedt, W. Feng, G. Goavec-Merou, G. Martin, M. Sato
Passive RADAR acoustic delay line sensor measurement: demonstration using a WiFi (2.4 GHz) emitter and WAIC-band (4.3 GHz)
WiSEE conference (2018)
slides and manuscript ; movie of the experiment including SAR localization of the sensor (not discussed in the manuscript). The presentation should be quite similar to the talk (video) given at the First French GNURadio Days held in Lyon (2-3 July, 2018).
J.- M Friedt
La peinture sur spectre radiofréquence, et l'effet capture de la modulation en fréquence -- ou pourquoi les avions communiquent encore en AM
GNU/Linux Magazine France 216 (Juin 2018)
French manuscrit
English manuscript translation
A. Hugeat, J. Bernard, G. Goavec-Merou, P.Y Bourgeois, J.-M Friedt
Filter optimization for real time digital processing of radiofrequency signals: application to oscillator metrology
manuscript for the IFCS 2018 conference (poster session)

36-hours long GRAVES RADAR recording from Besancon, 40-km
east of GRAVES. X-axis is Doppler shift in Hz.

J.-M Friedt
RADAR passif par intercorrélation de signaux acquis par deux récepteurs de télévision numérique terrestre
GNU/Linux Magazine France 212 pp.36- (Feb. 2018)
manuscript

D. Rabus, F. Minary, G. Martin, J.-M Friedt
A high-stability dual-chip GPR for cooperative target probing
manuscript for the GPR2018 conference proceedings

W. Feng, J.-M Friedt, G. Cherniak, M. Sato
Novel Algorithm for High Resolution Passive RADAR Imaging with ISDB-T Digital TV Signal
IGARSS 2018 Conference
manuscript written by W. Feng. (poster session)
Passive radar imaging by filling gaps between ISDB digital TV channels
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing (JSTARS) vol 12 issue 7, pp 2055-2068 (July 2019) (10.1109/JSTARS.2019.2891114)
manuscript written by W. Feng.

W. Feng, J.-M. Friedt, G. Cherniak, M. Sato
Batch compressive sensing for passive radar range-Doppler map generation
IEEE Transactions on Aerospace and Electronic Systems (2019) (10.1109/TAES.2019.2897474)
manuscript

W. Feng, G. Cherniak, J.-M Friedt, M. Sato
Software defined radio implementation of passive RADAR using low-cost DVB-T receivers
URSI-F#620 meeting (Dec. 13 2017, Tokyo, Japan)
slides of the presentation and manuscript also presented at FOSDEM2018: (Yet another) passive RADAR using DVB-T receiver and SDR
Passive radar range-Doppler map of a landing plane (cross-correlation)
Passive radar range-Doppler map of a landing plane (auto-correlation: many artifact, but only requires one receiver)
Passive radar range-Doppler map of a ship
Video of the oral presentation given at FOSDEM2018.
Extended version of the initial document yielding the manuscript published in Rev. Sci. Instrum. vol.89, 104701 (Sept. 2018)
Gnuradio-companion flowgraph for demonstrating on synthetic signals the principle of passive RADAR.

J.M Friedt, D. Rabus, G. Martin, F. Chérioux, M. Sato
Acoustic wave transducers as Ground Penetrating RADAR cooperative targets for sensing applications
French-Japanese Week on Disaster Risk Reduction (Oct. 05 2017, Tokyo, Japan)
slides of the presentation and manuscript

3D model from photogrammetric processing — Click on image to access the 3D model

J.M. Friedt
Mesure stroboscopique du champ de déplacement d'un diapason à quartz au moyen d'une carte son et d'une webcam
manuscript published in Bulletin de l'Union des Physiciens 999 (Dec. 2017)

J.-M. Friedt, G. Martin, G. Goavec-Merou, D. Rabus, S. Alzuaga, L. Arapan, M. Sagnard, É. Carry
Acoustic transducers as passive cooperative targets for wireless sensing the sub-surface world: challenges of probing with Ground Penetrating RADAR
article published in MDPI Sensors vol 18, num 1, p.246 (Jan. 2018)
G. Goavec-Merou, J.-M. Friedt
Un environnement exécutif visant la compatibilité POSIX : NuttX pour contrôler un analyseur de réseau à base de STM32
GNU/Linux Magazine France (Dec. 2017)
Manuscrit (French)
B. Ossété-Gombé, G. Goavec Merou, K. Breschi, H. Guyennet, J.-M. Friedt, V. Felea & K. Medjaher
A SAW Wireless Sensor Network Platform for Industrial Predictive Maintenance
manuscript
Journal of Intelligent Manufacturing (2017)
A.C. Càrdenas-Olaya, E. Rubiola, J.-M., Friedt, P.-Y. Bourgeois, M. Ortolano, S. Micalizio, & C.E. Calosso
Noise Characterization of Analog to Digital Converters for Amplitude and Phase Noise Measurements
manuscript written by C. Càrdenas-Olaya, Rev. Sci. Instrum. 88 (6), pp.065108 (Jun. 2017)
Q. Macé, J.-M Friedt
FreeRTOS : application à la réalisation d'un analyseur de réseau numérique sur STM32
GNU/Linux Magazine France 207 (Sept. 2017)
manuscrit
RDS decoding without digital clock recovery
(carrier recovery Costas output only)

RDS decoding WITH digital clock recovery
Décodage RDS avec asservissement de l'horloge
du signal numérique
J.-M Friedt
Radio Data System (RDS) -- analyse du canal numérique transmis par les stations radio FM commerciales, introduction aux codes correcteurs d'erreur
GNU/Linux Magazine France 204 (May 2017)
archive contenant un exemple d'acquisition en sortie du block de correction d'horloge, et script GNU/Octave de traitement.
archive including an acquisition following the digital clock recovery block, and GNU/Octave for processing.
manuscript (French) and English translation of the article.
Erreur : contrairement à ce qui est dit dans l'article, le décodage de 2 bits erronés ne fonctionne pas toujours. Des lignes dans la matrice de décodage pour le cas 2 bits sont redondantes (e.g. le cas des bits 3 et 8 est identique au cas où 26 et 15 sont modifiés lors de la transmission).
Erratum publié dans GLMF 214 (Avril 2018) en complément de l'article de G. Royer.
J.-M Friedt
Creating georeferenced digital elevation models from unmanned aerial vehicle images
FOSDEM2017: Video of the presentation and slides.
J.-M. Friedt, C. Eustache, E. Rubiola
Décodage logiciel du signal de transfert de temps par DCF77 : introduction à la radio définie par logiciel au moyen d'une carte son
manuscrit conférence CETSIS 2017
FOSDEM2017 presentation.
Video of the FOSDEM2017 talk entitled Monitoring the ionosphere altitude variation with a sound card: software defined radio processing of DCF-77 signals
J.-M Friedt, C. Eustache, É. Carry, E. Rubiola
Software defined radio decoding of DCF77: time and frequency dissemination with a sound card
manuscript of the article published in Radio Science Vol 53, Num. 1, pp.48-61 (Jan 2018)
Datasets collected from beginning of Nov. 2016 until Apr. 2019: time delay between 1-PPS and DCF77 phase correlation maximum (1-s marker) in the moyenne4 file, and frequency offset between the sound card local oscillator and DCF77 carrier. See readme file for a detailed description. Also includes a GNU/Octave script for plotting data (go.m).
É. Carry, J.-M. Friedt
L'environnement Arduino est-il approprié pour enseigner l'électronique embarquée ?
manuscrit conférence CETSIS 2017
E. Bernard, J.-M. Friedt, C. Marlin, F. Tolle, M. Griselin, A. Prokop
Investigating snowpack volumes and icing dynamics in the moraine of an Arctic catchment using UAV/photogrammetry and LiDAR
Photogrammetric Record 32 (160), (2017)
manuscript (low resolution, small size)
C. Marlin, F. Tolle, M. Griselin, E. Bernard, A. Saintenoy, M. Quenet, J.-M. Friedt
Change in Geometry of a High Arctic glacier from 1948 to 2013 (Austre Lovénbreen, Svalbard)
manuscript and published version Geografiska Annaler: Series A, Physical Geography (2017)
J.-M Friedt, A. Hugeat, S. Lamare, F. Chérioux, D. Rabus, L. Arapan, S. Alzuaga
Subsurface wireless chemical sensing strategy compatible with Ground Penetrating RADAR
manuscript for the proceedings IWAGPR2017 (June 2017) and slides.
R. Boudot, G. Martin, J.-M Friedt, E. Rubiola
Frequency flicker of 2.3 GHz AlN-Sapphire high-overtone bulk acoustic resonators
manuscript and published version, J. Appl. Phys. vol. 120, issue 22, p.224903 (2016)
J.-M Friedt, É. Carry
Dissémination de données géoréférencées -- qgis-server et openlayers
GNU/Linux Magazine France 200 (Janvier 2017), pp.12-22
Exemple de serveur qgis sur qgis.sequanux.org.
Exercice : lancer firebug et dans console -> all, observer les erreurs liées à la requête vers les données stockées sur jmfriedt.free.fr (same origin policy).
manuscrit
Exemple de client openlayers3 (source) pour rechercher toutes les couches WFS et WMS sur le serveur qgis.sequanux.org/ (la fonction LayerSwitcher ne fonctionnait pas avec OpenLayers3 au moment de la rédaction du manuscrit).
Idem pour MNT et orthophotos à Besançon
Exemple en HTML incluant des photographies géoréférencées au travers d'un fichier de description en KML tel que décrit dans Openlayers3: beginner's guide.
J.-M Friedt
Modification des appels systèmes du noyau Linux : manipulation de la mémoire du noyau
Hors Série 87 GNU/Linux Magazine France, Novembre 2016
manuscrit et codes associés
J.-M Friedt
Modélisation et utilisation d'une parabole : application au wifi
Opensilicium 20 (Octobre-Novembre-Décembre 2016), pp.44-55
manuscrit
Sébastien Euphrasie a noté une erreur sur la simulation hors-axe du réflecteur sphérique : la bissectrice (normale à la surface) doit être la même dans ou hors axe, ce qui n'est pas le cas. La version corrigée de cette figure (erreur d'addition au lieu de soustraction de l'angle hors-axe). Le cas de la parabole semble correct (attention aux axes qui n'ont pas la même taille en abscisse et ordonnée).
E. Bernard, J.M. Friedt, F. Tolle, Ch. Marlin, M. Griselin
Using a small COTS UAV to quantify moraine dynamics induced by climate shift in Arctic environments.
International Journal of Remote Sensing (IJRS) vol. 38, (8-10), pp.2480-2494 (2017), 10.1080/01431161.2016.1249310
manuscript (Nov. 2016) and published version
F. Minary, D. Rabus, G. Martin, J.-M. Friedt
Note: a dual-chip stroboscopic pulsed RADAR for probing passive sensors
Review of Scientific Instruments vol.87, p.096104 (2016), DOI: http://dx.doi.org/10.1063/1.4963745
manuscrit
J.-M Friedt
Recherche de motifs géométriques dans une image : la transformée de Hough
GNU/Linux Magazine France 197 (Octobre 2016), pp.22-33
Page complémentaire au manuscrit
N. G. Semaltianos, J. M. Friedt, R. Chassagnone, V. Moutarlier, V. Blondeau-Patissier, G. Combe, M. Assoul, G. Monteil
Oxide or carbide nanoparticles synthesized by laser ablation of a bulk Hf target in liquids and their structural, optical and dielectric properties
manuscript J. Appl. Phys., Vol.119, Issue 20 (2016), DOI: 10.1063/1.4951740 (with my contribution being the measurement of the capacitance of the nanoparticle layer for the computation of its relative permittivity).
Now rather than allowing for providing the formatted article, AIP kindly allows to share our own manuscript: "In accordance with our License to Publish Agreement with Authors, AIP Publishing encourages you to post and share the Accepted Manuscript immediately after acceptance, enabling you to remain fully compliant with institutional, government and funding agency requirements and open access mandates."
J.-M Friedt, L. Francis
Combined surface acoustic wave and surface plasmon resonance measurement of collagen and fibrinogen layers
Sensing and Bio-sensing Research, 2016, available online.
manuscript or arXiv physics/0310096
A. Godet, J.-M Friedt, S. Dembélé, N. Piat, A. Khelif, P. Vairac, J. Agnus, P.Y. Bourgeois, G. Goavec-Merou
Mapping acoustic field distributions of VHF to SHF SAW transducers using a Scanning Electron Microscope
proceeding and poster for the 30th EFTF conference (York, England, April 4th-7th 2016).
J.-M Friedt
Passive cooperative targets for subsurface physical and chemical measurements
manuscript for the GPR2016 proceedings (Hong Kong)
Passive cooperative targets for subsurface physical and chemical measurements: a systems perspective
manuscript, IEEE Geoscience and Remote Sensing Letters vol 14, issue 6, pp.821-825 (2017)
J.-M Friedt, E. Bernard, F. Tolle
Utilisation de Micmac pour la génération de modèle numérique d'élévation par traitement d'images acquises par microdrone
manuscript (in French) for GNU/Linux Magazine 191 (March 2016), pp.48-57 and slides of an internal presentation (in French), FOSS4G-fr tutorial web page [in French].
An example web page using qgis-server for exporting georeferenced data through the web.
English translation of the article.
J.-M Friedt
Wideband measurement strategies: from RADAR to passive wireless sensors ... and how passive wireless sensors were/are used by intelligence agencies.
slides of the presentation at FOSDEM2016 (Brussels, Belgium): oral presentation.
tarball of the GRC graph, associated processing blocks, and Atmega32U4 PWM/RS232 generating code.
T. Daugey, J.-M. Friedt, G. Martin, and R. Boudot
A HBAR-oscillator-based 4.596 GHz frequency source: Application to a coherent population trapping Cs vapor cell atomic clock
Rev. Sci. Instrum. vol 86, num. 11, p. 114703 (2015)
manuscript and supplementary material including one of the answers to the reviews concerning the phase noise of the amplifier (figure not included in the main article).
D. Rabus, J.M. Friedt, S. Ballandras, T. Baron, E. Lebrasseur, and É. Carry
High-overtone Bulk-Acoustic Resonator gravimetric sensitivity: towards wideband acoustic spectroscopy
J. Appl. Phys. 118, 114505 (2015)
manuscript with minor corrections in red
J.-M Friedt
Cartographier le bout du monde
GNU/Linux Magazine France 185 (Sept. 2015)
manuscript
J.-M Friedt, G. Cabodevila
Exploitation de signaux des satellites GPS reçus par récepteur de télévision numérique terrestre DVB-T
OpenSilicium 15, Juillet-Sept. 2015, cours d'automatique G. Cabodevila en référence de l'article, et manuscrit (in French)

English translation of the article, entitled "Decoding GPS satellite signals received by terrestrial digital video-broadcast (DVB-T) receivers" for the European Frequency and Time Seminar (EFTS) + slides presented during the lab sessions of EFTS. Some extension on the use of DVB-T -- limited to 2.4 MS/s or practically 2.046 MS/s to exactly match the Nyquist sampling rate of GPS signals -- is concerned with the use of the (now discontinued) GN3S v.2 dongle. Although "retired", the authors of gnss-sdr have kept the driver up to date which has been used in our latest (July 2015) experiments as summarized here.
This article is a sequel to the presentation:
S. Martinez Gutierrez, J.-M Friedt, G. Cabodevila, P.Y Bourgeois, E. Rubiola
Software Defined Radio for processing GNSS signals
slides presented at FOSDEM 2015 and archive of data and scripts. Video recorded during the talk.
Sound from the ISS/Signal depuis l'ISS

Multiplexed broadcast FM reception
Réceptions simultanées sur la bande FM commerciale
J.-M Friedt
La réception de signaux venus de l'espace par récepteur de télévision numérique terrestre
OpenSilicium 13(Dec 2014/Jan-Fev 2015)
manuscrit
erreur sur la Fig. 14 : 136,8+1,4=138,2 et non 140,2 ! Mais NOAA18 reste sous cette borne, donc le texte reste juste.
J.-M Friedt, A. Hugeat
A low cost approach to acoustic filters acting as GPR cooperative targets for passive sensing
manuscript for the proceedings of IWAGPR 2015 (Firenze, Italy), and associated slides.
An extended version of the slides prepared for an internal seminar at ISTerre laboratory (Grenoble, France).
A. Bontempi, D. Teyssieux, J.-M. Friedt, L. Thiery, D. Hermelin, P. Vairac
Photo-thermoelastic Quartz Tuning Fork excitation for Dynamic Mode Atomic Force Microscope
Appl. Phys. Lett. vol. 154104, p.154104 (2014)
manuscript Laser output power used during the experiment: 70 mW
B. François, J.-M. Friedt, G. Martin, S. Ballandras
High temperature packaging for surface acoustic wave transducers acting as passive wireless sensors
Sensors and Actuators A: Physical, vol. 224 (2015), pp.6-13
manuscript
Un film résumant l'insertion d'un nuage de points 3D
issu de Micmac dans QGis.
A movie illustrating how to insert a 3D point cloud generated
by Micmac in QGis.

J.-M Friedt
Reconstruction de structures tridimensionnelles par photographies : le logiciel MicMac
OpenSilicium 12 (Sept-Oct-Nov 2014)
manuscrit et transparents pour une présentation à Sequanux.
English translation for the 13th International Circumpolar Remote Sensing Symposium (2014, Reykjavik, Iceland) and the slides of the presentation we gave about "Assessment of photogrammetry Structure-from-Motion compared to terrestrial LiDAR scanning for generating Digital Elevation Models -- Example in a polar basin, Spitsbergen 79oN" (E. Bernard, J.-M Friedt, A. Prokop, F. Tolle, M. Griselin).
"Gestion d'Informations Spatialisées : outils libres pour l'exploitation de données géolocalisées -- au-delà des aspects géographiques" pour la conférence CETSIS2014.

WebGL based point cloud browser: WARNING, chances are that your web browser will crash when accessing this webpage (Chromium 35.0.1916.153 to 52.0.2743.116 works fine on a Debian/GNU Linux computer, Iceweasel 30.0 crashes on the same computer and 45.2 is unable to render the display).
Two tutorials on processing UAV pictures for DEM extraction, over the Besancon observatory and in Spitsbergen.
J.-M. Friedt, R. Boudot, G. Martin, S. Ballandras
Probing a dielectric resonator acting as passive sensor through a wireless microwave link
Rev. Sci. Instrum. vol. 85, num. 9, pp. 024409RSI (2014)
manuscript and proof of the article.
G. Heider, J.-M Friedt, G.W. Bres-Saix, G. Goavec-Merou, A. Hugeat
Delay line interrogation (revisited) and industrial temperature sensing in HV environments
SAW Symposium 2014 (Vienna, Austria)
J.-M Friedt
Le télescope à particules cosmiques : principe de la mesure par coincidence
Opensilicium 11 (Juin-Juillet-Aout 2014) manuscript [in French]
G. Goavec-Merou, J.-M Friedt
GNURadio as a general purpose digital signal processing environment
FOSDEM 2014
slides of the presentation and link to the video. Notice that Sylvain Munault and Harald Welte mentioned a mistake in my statement: although the Elonics E4000 is no longer available, osmosdr will keep on running with all the other DVB-T chips and most significantly the R820T.
G. Matten, J.-M Friedt, É. Carry
Prototypage de traitements numériques de signaux au moyen d'un outil libre : GNURadio
document for the CETSIS2014 conference, published in Journal sur l'enseignement des sciences et technologies de l'information et des systèmes (J3EA, in French).
N. Chrétien, J.-M. Friedt, G. Martin
Local oscillator phase noise limitation on the resolution of acoustic delay line wireless passive sensor measurement
Rev. Sci. Instrum., vol. 85, n.6, 065001 (2014)
manuscript and published article.
N. Chrétien, J.-M. Friedt, G. Martin, S. Ballandras
Acoustic transducers as passive sensors probed through a wireless radiofrequency link
Instrumentation, Mesure, Métrologie (I2m), vol 13, num3-4 (2013), pp.159-178
manuscript
J.-M Friedt
Quelques considérations sur les particules ionisantes présentes en haute altitude -- aspects expérimentaux et d'analyses de données
Opensilicium vol. 9 (Dec 2013-Jan-Fev 2014), pp.28-39
Le programme geiger.c utilisé pour enregistrer les coups du compteur sur un port série virtuel (convertisseur USB-série) sous GNU/Linux, modifié pour réinitialiser le module noyau du port série lors d'une déconnexion alors que le compteur tourne (cas fréquent lorsque le compteur et l'ordinateur sont dans un sac à dos). Remplacer le nom du module noyau si un autre adaptateur est utilisé (ici PL2303).
manuscript
J.-M Friedt
Correction géométrique d'images prises en vue oblique -- projection sur modèle numérique d'elévation pour exploitation quantitative de photographies numériques
GNU/Linux Magazine France n.167, Janvier 2014, pp.42-57
manuscrit Complements concerning the cast shadow calculation.
Référence manquante/missing reference worth checking (new 25-m European DEM + r.sun usage), added following the manuscript submission..
Three free sources of DEM are available for these tests: SRTM, EU-DEM which combines SRTM with ASTER, and the French mapping agency IGN BDalti database (for the latter, Lambert 93 projection is indicated to QGis using the epsg2154 coordinate transformation system). Difference between each 2 of these DEM shows small (less than 5 m) discrepencies over flat areas -- Mer de Glace and Chamonix valley -- the discrepencies can be up to 190 m in the steepest part of the Mont Blanc area.
G. Goavec-Merou, N. Chrétien, J.-M Friedt, P. Sandoz, G. Martin, M. Lenczner, S.Ballandras
Fast contactless vibrating structure characterization using real time FPGA-based digital signal processing: demonstrations with a passive wireless acoustic delay line probe and vision
Rev. Sci. Instrum Vol 85, issue 1, Jan. 2014, pp.015109
published version. "Under AIP policy, you have the right to post this article on your personal web page or your employer's website, provided you include the appropriate copyright and a web link to AIP's official online abstract, as indicated by the URL above."
J.-M Friedt
Hacking the radiofrequency spectrum: GNURadio as a signal processing prototyping tool
OHM 2013 (Observe, Hack, Make) (The Netherlands, 31 Jul-04 Aug. 2013)
slides of the presentation and recorded talk on Youtube online thanks to the organizers of the conference.
J.-M Friedt, A. Saintenoy, T. Baron, E. Lebrasseur, T. Laroche, S. Ballandras, M. Griselin
High-overtone Bulk Acoustic Resonator as passive sensor acting as buried cooperative target interrogated by Ground Penetrating RADAR
Manuscript for the proceedings and slides of 2013 IFCS (Prague, Czech Rep.)
D. Teyssieux, T. Baron, J.-M. Friedt, G. Martin, P. Vairac
Absolute phase and amplitude mapping of surface acoustic wave fields
Manuscript for the proceedings of 2013 IFCS (Prague, Czech Rep.)
N. Chrétien, J.-M. Friedt, G. Martin, S. Ballandras
A stroboscopic approach to surface acoustic wave delay line interrogation
Manuscript for the proceedings of 2013 IFCS (Prague, Czech Rep.)
J.-M Friedt
GNURadio as a digital signal processing environment: application to acoustic wireless sensor measurement and time & frequency analysis of periodic signals
Manuscript for the proceedings and poster presented at 2013 IFCS (Prague, Czech Rep.)
J. Marc, C. Canard, A. Vailly, V. Pichery, J.-M. Friedt
Le diapason à quartz comme capteur : utilisation de la carte son de PC pour l'instrumentation
Bulletin de l'Union des Physiciens n.958, pp.1051-1076 (2013)
manuscript
Film de la manip (signal généré par GNURadio, affichage sur oscilloscope).
J.-M Friedt, A. Saintenoy, S. Chrétien, T. Baron, E. Lebrasseur, T. Laroche, S. Ballandras, M. Griselin
High-overtone Bulk Acoustic Resonator as passive Ground Penetrating RADAR cooperative targets
manuscript J. Appl. Phys., vol 113, num. 13, pp. 134904 (2013)
published version ("We are also pleased to send you a complimentary copy of your article in PDF form. Under AIP policy, you have the right to post this article on your personal web page...") with the direct link to the AIP web page.
E. Bernard, J.-M. Friedt, A. Saintenoy, F. Tolle, M. Griselin, C. Marlin
Where does a glacier end ? GPR measurements to identify the limits between the slopes and the real glacier area. Application to the Austre Lovénbreen, Spitsbergen -- 79o N
manuscript International Journal of Applied Earth Observation and Geoinformation (special issue on "Polar regions in transformation"), vol 27, pp. 100-108 (2014)
(online 19 August 2013))
Recording ACARS messages
and voice communication:
with narrowband filter.

Recording ACARS messages
and voice communication:
no narrowband filter.
J.-M Friedt, G. Goavec-Merou
La réception radiofréquence définie par logiciel (Software Defined Radio -- SDR)
GNU/Linux Magazine France 153 (Octobre 2012), pp.4-33
manuscrit
The article (also translated to English) focuses on implementations of digital processing algorithms on GNURadio 3.6: a port of the ACARS decoding software to GNURadio 3.7 is available at Sourceforge web site. Although the detailed implementation has changed, the basics remain the same and so does the general development method described.
J.-M Friedt
Radiofrequency communication on a budget: a software approach
Invited at First EPS conference "Physics for Development" Research in Physics - Physics applications - Education 11-12 October Palais des Académies (Brussels, Belgium)
slides and a quick addition concerning the use of opensource software for data processing
G. Goavec-Merou, K. Breshi, G. Martin, S. Ballandras, J. Bernard, C. Droit, J.-M Friedt
Multipurpose use of radiofrequency sources for probing passive wireless sensors and routing digital messages in a wireless sensor network
eWise workshop, at IEEE iThings conference, Besançon, Nov. 2012
slides and manuscript of the proceeding.
J.-M Friedt, N. Chrétien, T. Baron, E. Lebrasseur, G. Martin, S. Ballandras
High-overtone Bulk Acoustic Resonator (HBAR) as passive sensor: towards microwave wireless interrogation
eWise workshop, at IEEE iThings conference, Besançon, Nov. 2012
slides and manuscript of the proceeding.
J.-M Friedt
Introduction au langage PostScript
GNU/Linux Magazine France 152 (Septembre 2012), pp.60-70
manuscrit de l'article corrigé de l'absence des codes d'exemple de la fractale de Mandelbrot et du diagramme de bifurcation de Feigenbaum .
Un fascicule rédigé pour Science en Fete 1997, dont une section (pp.11-14) par E. Jalade décrit le pavage de Penrose, et code postscript associé par C. Papazian.
T. Laroche, G. Martin, W. Daniau, S. Ballandras, J.-M. Friedt, J.-F. Leguen
A Coupled-Mode Filter Structure for Wireless Transceiver-Sensors using Reactive Loads
IFCS 2012 (Baltimore, USA)
manuscript for the proceedings (by S. Ballandras)
P. Varshney, B.S. Panwar, P. Rathore, S. Ballandras, B. Francois, G. Martin, J.-M. Friedt, T.Rétornaz
Theoretical and experimental analysis of high Q SAW resonator transient response in a wireless sensor interrogation application
IFCS 2012 (Baltimore, USA)
poster and manuscript for the proceedings
T. Rétornaz, N. Chrétien, J.-M Friedt, G. Martin, S. Ballandras
Time reversal: a flexible approach for identifying and measuring surface acoustic wave delay lines acting as wireless, passive sensors
IFCS 2012 (Baltimore, USA)
poster and manuscript for the proceedings
N. Chrétien, J.-M Friedt, S. Ballandras, B. Francois, G. Martin, P. Varshney
On the need for low phase noise oscillators for wireless passive sensor probing
manuscript Sensorcomm 2012 (Rome, Italy, Aug. 2012) following an internal lab presentation on the influence of oscillator phase noise on wireless passive sensor measurement resolution using a wireless link.
C. Droit, J.-M.Friedt G. Goavec-Merou, G. Martin, S. Ballandras, K. Breschi Jimenez-Ramirez, J. Bernard, H. Guyennet
Radiofrequency transceiver for probing SAW sensors and communicating through a wireless sensor network
manuscript Sensorcomm 2012 (Rome, Italy, Aug. 2012)
J.- M Friedt, G. Goavec-Merou
Traitement du signal sur système embarqué -- application au RADAR à onde continue
manuscript
GNU/Linux Magazine France n.149 (Mai 2012)
Une photographie de la manip avec le ventilateur dont les pales sont couvertes d'adhésif métallisé
G. Goavec-Merou, J.-M Friedt
Le microcontroleur STM32 : un coeur ARM Cortex-M3
manuscript
GNU/Linux Magazine France n.148 (Avril 2012)
J.-M Friedt, C. Droit, S. Ballandras, S. Alzuaga, G. Martin, P. Sandoz
Remote vibration measurement: a wireless passive surface acoustic wave resonator fast probing strategy
manuscript of the article published in Rev. Sci. Instrum. vol. 83, p.055001 (May 1st 2012)
Link to the AIP web site.
Error in the caption of Fig. 1: C1 is 0.56 fF (as correctly noted in the supplementary material). Possible error in the caption of Fig. 3: I am not sure where the 362 Hz comes from, the calculation in the text is correct and so is the stress value mentioned in the caption.
T. Rétornaz, J.-M Friedt, S. Alzuaga, T. Baron, E. Lebrasseur, G. Martin, T. Laroche, S. Ballandras, M. Griselin, J.-P. Simonnet
Piezoelectric radiofrequency transducers as passive buried sensors
manuscript and proof of Nondestructive Testing and Evaluation -- Special Issue on Civil Eng. Applications of GPR vol.27 num.3 pp.209-218 (10/2011, revised 01/2012, online May 21 2012)
E. Bernard, J.-M Friedt, G. Martin, M. Griselin, C. Marlin
La photographie terrestre haute résolution pour quantifier les dynamiques nivales de versants : l'exemple d'un bassin glaciaire arctique (Loven Est, Spitsberg, 79oN)
La Houille Blanche Num. 5, pp. 20-28, Nov. 2011
manuscript
D. Rabus, T. Baron, E. Lebrasseur, S. Alzuaga, G. Martin, S. Ballandras, J.-M. Friedt
Novel Narrowband Acoustic Sensors for Sub-GHz Wireless Measurements
IEEE Sensors conference (Limerick, Ireland from 28-31 October 2011)
manuscript for the proceedings
slides of the oral presentations
A slightly extended version prepared for an Energy Harvesting Workshop organized by the French embassy in Japan (7-9 Nov. 2011) and the Indo-French Symposium on Sensors Technologies and Systems (IIT Delhi, 1-4 March 2012)
E. Bernard, J.-M Friedt, F. Tolle, M. Griselin, G. Martin, D. Laffly, C. Marlin
Monitoring seasonal snow dynamics using ground based high resolution photography (Austre Lovénbreen, Svalbard, 79oN)
ISPRS Journal of Photogrammetry and Remote Sensing Vol. 75, January 2013, pp. 92-100
manuscript
F. Vernier, R. Fallourd, J.-M. Friedt, E. Trouvé, J.-M. Nicolas, L. Moreau
Fast Correlation Technique for Glacier Flow Monitoring by Digital Camera and Space-borne SAR Images
EURASIP Journal on Image and Video Processing Vol. 11, doi:10.1186/1687-5281-2011-11
manuscript
J.-M Friedt
Auto et intercorrélation, recherche de ressemblance dans les signaux : application à l'identification d'images floutées
GNU/Linux Magazine France 139 (Juin 2011)
manuscrit
Une référence qui mérite à être citée et oubliée dans la biblio.
E. Bernard, J.-M Friedt, F. Tolle, C. Marlin, M. Griselin
Using ground based high resolution photography for seasonal snow and ice dynamics (Austre Lovénbreen, Svalbard, 79oN)
Alpine Glaciological Meeting (AGM) 2011, Munchen, Germany
slides of the presentation
A. Saintenoy, J.-M. Friedt, F. Tolle, E. Bernard, D. Laffly, C. Marlin, M. Griselin
High density coverage investigation of The Austre LovénBreen (Svalbard) using Ground Penetrating Radar
6th International Workshop on Advanced Ground Penetrating Radar (IWAGPR), 2011 (22-24 June 2011, Aachen, Germany)
article for the proceedings of the conference
A. Saintenoy, J.-M. Friedt, A. D. Booth, F. Tolle, E. Bernard, D. Laffly, C. Marlin, M. Griselin
Deriving ice thickness, glacier volume and bedrock morphology of the Austre Lovénbreen (Svalbard) using Ground-penetrating Radar
Manuscript, Near Surface Geophysics vol. 11, num. 2, April 2013, pp.253-261
T Rétornaz, J.-M Friedt, A. Saintenoy, L. Reindl, S. Chrétien, S. Alzuaga, G. Martin, S. Ballandras, M. Griselin, J.-M. Simonnet
Piezoelectric radiofrequency transducers as passive buried sensors
RADCOM 2011, Hamburg, Germany
slides of the oral presentation
T Rétornaz, J.-M Friedt, S. Alzuaga, T. Baron, G. Martin, T. Laroche, S. Ballandras, M. Griselin, J.-M. Simonnet,
Piezoelectric radiofrequency transducers as passive buried sensors
European Geophysical Union (EGU) 2011, Vienna, Austria
abstract and associated poster
F. Kardous, L. El Fissi, J-M Friedt, F. Bastien, W. Boireau, R. Yahiaoui, JF. Manceau, S. Ballandras
Integrated active mixing and biosensing using low frequency vibrating mixer and Love-wave sensor for real time detection of antibody binding event
Journal of Applied Physics vol. 109, 094701 (2011)
manuscript including corrections following the comments of the reviewer, and final copy.
direct link to AIP
G. Goave-Merou, J.-M Friedt
Développement pour iPod Touch sous GNU/Linux : application à la communication par liaison Bluetooth
GNU/Linux Magazine France Hors Série 51 (Dec 2010-Jan 2011), pp.34-53
sample software
As an example of a MobileTerminal application (grabbed using uishoot), SatTrack compiled for iPod Touch 3G using the iphonedevonlinux toolchain: put the SatTrack directory in $HOME (either /var/mobile or /var/root, depending on which user you are using), cd SatTrack/run and ./sattrack to predict NOAA 18 passes (default configuration, see data/defaults0.dat)
manuscript
J.-M Friedt
Introduction à SPICE3 : simulation de circuits électroniques, et au-delà
OpenSilicum 1 (Janvier-Mars 2011)
archive des exemples
transparents de Rémi Brendel (professeur ENSMM) sur WinSpice, dont la trame a servi de référence à mon document
manuscript
J.-M Friedt, T. Rétornaz, S. Alzuaga, T. Baron, G. Martin, T. Laroche, S. Ballandras, M. Griselin, J.-P. Simonnet
Surface Acoustic Wave Devices as Passive Buried Sensors
Journal of Applied Physics vol. 109, issue 3, p. 034905 (02/2011)
manuscript
proof of the article
error in item 3 of the 7th page of the article: the FSPL cannot be λ^2/d^4 (not homogeneous). I have forgotten to include the radar cross section ~ λ^2 in the equation, which should read FSPL ~ λ^4/d^4 (will not change the conclusion)
Oct. 2016: possible error in the computation of the peak power. I use 360V (avalanche transistor bias voltage) squared/70 ohms. However the capacitor at the collector of the avalanche transistor accumulates charges through the current limiting resistor until the avalanche threshold voltage is reached, typically around 60V. If such a condition is met, then the peak power is only 60*60/70~50 W.
R. Fallourd, F. Vernier, J.-M. Friedt, G. Martin, E. Trouvé, L. Moreau, J.-M. Nicolas
Monitoring temperate glacier with high resolution automated digital cameras: application to the Argentière glacier
Photogrammetric Computer Vision and Image Analysis (PVC2010, Paris, France)
proceeding of the conference
D. Laffly, E. Bernard, M. Griselin, F. Tolle, J-M. Friedt, G. Martin and C. Marlin
High temporal resolution monitoring of snow cover using oblique view ground-based pictures
The 11th International Circumpolar Remote Sensing Symposium (Cambridge UK, Sept. 2010)
Slides of the presentation
Manuscript of an article published in the associated special issue of Polar Record Vol. 48, Num. 01, pp 11-16 (Jan. 2012), and final published version
J-M. Friedt, F. Tolle, E. Bernard, M. Griselin, D. Laffly and C. Marlin
Assessing the relevance of digital elevation models to evaluate glacier mass balance: application to Austre Lovénbreen (Spitsbergen, 79oN)
The 11th International Circumpolar Remote Sensing Symposium (Cambridge UK, Sept. 2010)
Slides of the presentation
Manuscript of an article published in the associated special issue of Polar Record Vol. 48, Num. 01, pp 2-10 (Jan. 2012), and final published version

Notwithstanding the assignment of copyright in their contribution, all contributors retain the following non-transferable rights: The right to post the definitive version of the contribution as published at Cambridge Journals Online (in PDF or HTML form) on their personal or departmental web page, no sooner than upon its appearance at Cambridge Journals Online, subject to file availability and provided the posting includes a prominent statement of the full bibliographical details, a copyright notice in the name of the copyright holder (Cambridge University Press or the sponsoring Society, as appropriate), and a link to the online edition of the journal at Cambridge Journals Online.
N. Chrétien, M. Lamothe, G. Goavec-Merou, J.-M Friedt
Development of libraries for radiofrequency instrumentation using FPGAs
10eme Rencontres Mondiales du Logiciel Libre (6-10/07/2010, Bordeaux, France)
slides
G. Goavec-Merou, J.-M Friedt
Developing for Apple iPod under GNU/Linux
10eme Rencontres Mondiales du Logiciel Libre (6-10/07/2010, Bordeaux, France)
slides
D. Rabus, J.-M. Friedt, S. Ballandras, G. Martin, É. Carry, and V. Blondeau-Patissier
A high sensitivity open loop electronics for gravimetric acoustic wave-based sensors
2010 EFTF (Noordwijk, The Netherlands)
manuscript for the proceedings
manuscript IEEE Trans. UFFC (2013) vol 60, num 6, 1219-1226 and proof of the document.
G. Goavec-Merou, J.-M Friedt, E. Pamba Capo-Chichi, H. Guyennet
Porting the FAT16 filesystem to TinyOS-2.x: non-volatile mass storage for low power sensor network nodes
rejected 8th SENSYS (November 2010, Zurich Switzerland)
rejected manuscript
C. Droit, G. Martin, S. Ballandras, J.-M Friedt
A frequency modulated wireless interrogation system exploiting narrowband acoustic resonator for remote physical quantity measurement
Rev. Sci Instrum. Vol 81, Issue 5, 056103 (2010)
manuscript and supplementary material
I am delighted to notice that AIP allows me to put a copy of the formatted article on my web site: "We are also pleased to send you a complimentary copy of your article in PDF form. Under AIP policy, you have the right to post this article on your personal web page or your employer's website, provided you include the appropriate copyright and a web link to AIP's official online abstract, as indicated by the URL above."
G. Goavec-Merou, J.-M Friedt
Etude d'un système d'exploitation pour microcontroleur faible consommation (TI MSP430) : pilote pour le stockage de masse au format FAT sur carte SD
GNU/Linux Magazine France Hors Série 47 (Avril-Mai 2010), pp.58-77
manuscript
J.-M Friedt
Controle d'instruments scientifiques : les protocoles GPIB, VXI11 et USBTMC
GNU/Linux Magazine France 124, 26-39 (Férier 2010), pp.60-66
manuscript
Complément à l'article : lecture des traces sur un oscilloscope Tektronix TDS20xx. Les commandes GPIB ne sont pas documentées dans le manuel de l'utilisateur. J'ai testé la séquence suivant (lire voie 2)
```
echo "*IDN?" > /dev/usbtmc0
cat < /dev/usbtmc0
echo "DATA:ENC ASCII" > /dev/usbtmc0
echo "DATA:SOURCE CH2" > /dev/usbtmc0
echo "CURVE?" > /dev/usbtmc0
cat < /dev/usbtmc0 >> t
cat < /dev/usbtmc0 >> t
```
donne les coordonnées des pixels, qu'il faut convertir en tension par
```
echo "WFMPRE:YMULT?" > /dev/usbtmc0
cat < /dev/usbtmc0
echo "WFMPre:YZERO?" > /dev/usbtmc0
cat < /dev/usbtmc0
echo "WFMPre:XINCR?" > /dev/usbtmc0
cat < /dev/usbtmc0
```
Pour sauver dans une image au format Postscript :
```
echo "HARDCOPY:FORM EPSIMAGE" > /dev/usbtmc0
echo "HARDCOPY STAR" > /dev/usbtmc0
cat < /dev/usbtmc0 > image.eps
```
J.-M Friedt
Tomtom Go : une plateforme pour l'acquisition sans fil de mesures géoreférencees
GNU/Linux Magazine France 122, 26-39 (Décembre 2009)
manuscript
J.-M Friedt, C. Droit, G. Martin, and S. Ballandras
A wireless interrogation system exploiting narrowband acoustic resonator for remote physical quantity measurement
Rev. Sci. Instrum. vol. 81, 014701 (2010)
manuscript
erroneous assumption: I compute the bias using a parabolic fit on a BvD model, while the actual receiver stage of the SAW interrogation unit uses a logarithmic power detector (Analog Devices AD8362). Hence, the error between parabolic fit and "true" resonance shape should be performed on the log(BvD), not the BvD model itself.
L. El Fissi, J.-M. Friedt, F. Chérioux, S. Ballandras
Amine functionalized SU-8 layer guiding Love mode surface acoustic wave
Sensors and Actuators B vol 144, issue 1 (January 2010), pp.23-26
manuscript
L. El Fissi, J.-M. Friedt, F. Chérioux, V. Luzet, S. Ballandras
Fabrication and Packaging Technologies of Love-wave-based Microbalance for Fluid Analysis
Sensors and Actuators A vol 162 (2010) pp.304-309 (preliminary version in Procedia Chemistry vol.1, issue 1, Proceedings of Eurosensors XXIII conference, September 2009, pp.52-55)
manuscript of the article
T. Rétornaz, J.-M. Friedt, G. Martin, S. Ballandras
USRP and GNURadio for prototyping radiofrequency communication algorithms
RMLL 2009
Abstract and slides
J.-M Friedt, G. Goavec-Merou
Interfaces matérielles et OS libres pour Nintendo DS : DSLinux et RTEMS
GNU/Linux Magazine France Hors Série 43, aout 2009
manuscrit
exemple en espace utilisateur et exemples en espace noyau pour DSLinux, ainsi que quelques exemples pour RTEMS
Un patch rtems_nds_wireless.patch pour rendre le wifi fonctionnel pour RTEMS 4.9.1 et 4.9.2
A patch reorganizing a data structure in the NDS BSP of RTEMS 4.9.1 et 4.9.2 needed to make the wifi interface functional

complements suite aux RMLL2009 : utilisation d'un eeePC701 en access point pour connexion directe DS-eeePC (explications de Fred. Tronel)
slides de la présentation aux RMLL 2009 (Nantes)
slides and article for Hacking at Random (HAR2009) discussing the same topic in English (YouTube video of the presentation).
J.-M Friedt, É. Carry
Développement sur processeur à base de coeur ARM7 sous GNU/Linux
GNU/Linux Magazine France 117 (Juin 2009), pp.40-59
exemples associés à l'article (carte SD et format FAT, écran LCD, bases) + compression sans pertes au moyen de SLZW porté à l'ADuC7026.
schéma et implémentation du circuit contenant un ADuC7026 et AD9954 (Cadsoft Eagle 4).
manuscrit
update: binary archive of the gcc-4.3.3 toolchain which seems to have corrected the IRQ code generation bugs.
J.-M Friedt, T. Rétornaz, G. Martin, T. Laroche, J.-P. Simonnet, É. Carry, S. Ballandras
Surface Acoustic Wave Resonators as Passive Buried Sensors
2009 EFTF/IFCS (Besançon, France, April 2009)
slides of the presentation
article for the proceedings . Warning: some mistakes in this paper, as was pointed out to us by a reviewer when submitting this paper for publication in IEEE Trans. Ultrasonics, Ferroelectrics and Freq. Control: we model the propagation of the wave with a loss model following a 1/d2 law. This is wrong in the case of a radar, where the target acts as a point like source and hence only 1/d2 fraction of the energy reaching the target is used as the new source, yielding a 1/d4 behaviour (the classical radar equation). This analysis has been corrected in a version of the paper presented at Sensor Devices
J.-M Friedt, T. Rétornaz, G. Martin, T. Laroche, S. Alzuaga, J.-P. Simonnet, É. Carry, S. Ballandras
Surface Acoustic Wave Resonators as Passive Buried Sensors
article for the proceedings .
The First International Conference on Sensor Device Technologies and Applications -- SENSORDEVICES 2010 (Venice, Italy, July 2010)
S. Guinot, J.-M Friedt
GNU/Linux sur Playstation Portable
GNU/Linux Magazine France 114 , Mars 2009, pp.30-40
manuscrit
archive du bootloader (jeu PSP) pour firmware 1.50 (placer pspboot et pspboot% dans psp/game du MS, placer l'image compressée du noyau linux nommé vmlinux.bin dans eboot)
un exemple de noyau fonctionnel
slides and article for Hacking at Random (HAR2009) discussing the same topic in English.
J.-M Friedt
Affichage et traitement de données au moyen de logiciels libres
GNU/Linux Magazine France, 111 (Dec. 2008)
manuscrit
Circuit pour l'ecoute des chauves souris (Nouvelle Electronique Janvier 1996)
Exemple de fichier son de sonar de chauve souris
Données acquises avec le circuit précédent, modifié pour une bande passante de 50 kHz, et spectrogrammes résultant.
J.-M Friedt
Analyse des étiquettes d'identification par radiofréquence (RFID)
GNU/Linux Magazine France, Hors Série 39 (Nov.-Dec. 2008)
manuscrit
P.Sandoz, J.-M Friedt, É. Carry
Vibration amplitude of a tip-loaded quartz tuning fork during shear force microscopy scanning
Rev. Sci. Instrum., vol 79, issue 8 (08/2008), p.086102, DOI: 10.1063/1.2965137
proof of the article
J. Garcia, J.-M Friedt
Communication asynchrone et interface graphique portables sous Qt
Hors série GNU/Linux Magazine France n.38 (08/2008)
manuscript
codes sources associés
T. Rétornaz, J.-M Friedt
Instrumentation scientifique reconfigurable
Hors série GNU/Linux Magazine France n.38 (08/2008)
manuscript
codes sources associés (compteur réciproque et acquisition d'images depuis un capteur CMOS OV6620 sur Armadeus APF9328)
Présentation Temps Frequence sur les compteurs FPGA et asservissement sur GPS
Présentation orale aux Rencontres Mondiales du Logiciel Libre (RMLL) 2008
J.-M Friedt, G. Martin, S. Ballandras
Wireless and Mobile Acoustic Sensor Interrogation for (Bio)Chemical Sensing and Industrial Control
2008 IEEE International Frequency Control Symposium (Honolulu, USA, 18-21 May 2008)
slides of the tutorial
L. El Fissi, J-M. Friedt, S. Ballandras, L. Robert, F. Chérioux
Acoustic characterization of thin polymer layers for Love mode surface acoustic waveguide
2008 IEEE International Frequency Control Symposium (Honolulu, USA, 18-21 May 2008)
manuscript and slides
J.-M Friedt, C. Ferrandez, G. Martin, L. Moreau, M. Griselin,E. Bernard, D. Laffly, C. Marlin
Automated high resolution image acquisition in polar regions
12th Alpine Glaciological Meeting (Chamonix, France, 6-7 March 2008)
European Geosciences Union (Vienna, Austria, 13-18 April 2008)
Slides of the AGM presentation
Poster of the AGM presentation
Slides of the EGU presentation
Abstract of the EGU presentation
E. Mboungou, C. Mavon, J.-M. Friedt, C. Bergeon and M. Fromm
Impact of Water Content on the Electrical Behavior of Epoxy Insulators
IEEE Transactions on Dielectrics and Electrical Insulation, Vol 15, Issue 2, 2008, pp.311-318
manuscript
L. El Fissi, J.-M Friedt, S. Ballandras
Modeling The Rf Acoustic Behavior Of Love-wave Sensors Loaded With Organic Layers
2007 IEEE Ultrasonic Symposium (New York, USA)
manuscript
P. Sandoz, J.-M. Friedt, É. Carry, B.Trolard, J. Garzon Reyes
Frequency domain characterization of tuning-fork mechanical vibrations by vision and digital image processing
American Journal of Physics, vol. 77, issue 1, (January 2009), pp.20-26
Java software required for running the lab experiment (dual channel function generator using a PC sound card, running under Windows and GNU/Linux). Requires the additional installation of Jsyn available at http://www.softsynth.com/jsyn/ for best performances.
Demonstration routines for Matlab: run by executing Shift_demo.m.
manuscript
proof
J.-M. Friedt, A. Masse, F. Bassignot
Les microcontroleurs MSP430 pour les applications faibles consommations -- asservissement d'un oscillateur sur le GPS.
GNU/Linux Magazine France 98 , October 2007
manuscrit
archive des programmes contenus dans l'article
Picture geopositioning and display in QGis
J.-M. Friedt
Géolocalistion de photographies numériques
GNU/Linux Magazine France 96 , July/August 2007
manuscrit
script photos_asc.php pour tracer un chemin et y ajouter les photos prises pendant le trajet -- mise à jour juillet 2014 pour API Google Maps v3.
Conversion de nos trames GPS (corrompues) en GPX :
grep -a ^\$GPGGA 070522short.nmea |grep -v $'\xff' | gpsbabel -i nmea,GPGGA=1,date=20070101 -f - -o gpx -F -
Exemple1 : Paris
Exemple2 : Nice
Exemple3 : Besançon
Exemple4 : RMLL07 (Amiens)
Exemple5 : Spitsberg (Norway), including a trip to Kvadehuk (Sept. 2011) or another trip to Kvadehuk (Sept. 2013).
I no longer use the Perl script which is no longer functional due to the loss of some of the modules used. exiftool provides all the needed functionalities for extracting picture position from an NMEA-formatted GPS log. As an example
```
exiftool -geosync=-0:08:30 -geotag=GPS_logfile.nmea .
```
will search for the timestamp (Date/Time Original) of each image and the associated position in the GPS record. I am confused with the timezone issue: in my example, GPS time 11:46:27 was matching EXIF creation date header 13:53:46 (more or less) and yet I must not include the two hour offset since my computer seems to be set to the French timezone (UTC+2). The time offset 8 min 30 sec was obtained by taking a picture of the GPS-synchronized clock at Besançon observatory.
J.-M. Friedt, L. El Fissi, F. Chérioux, B. Guichardaz, V. Blondeau-Patissier, S. Ballandras
Design and Use of Wafer Level Fluidic Packaging for Surface Acoustic Wave Sensors
IFCS/EFTF, Geneva, Switzerland, May 29 - June 1, 2007
article for the proceedings
P. Sandoz, É. Carry, J.-M. Friedt, S. Ballandras
Digital image processing for measuring 2D vibration amplitudes with subpixel resolution: application to the quartz tuning fork
IFCS/EFTF, Geneva, Switzerland, May 29 - June 1, 2007
article for the proceedings
P. Sandoz, J. M. Friedt, É. Carry,
In-plane displacement measurement with sub-pixel resolution: application to vibration characterization of a shear-force scanning probe
SPIE Europe Optical Metrology, Munich, Germany 17-21 June 2007
G. Weisenhorn, E. Pamba Capo-Chichi, J.-M. Friedt
Communications de données et d'images issues de la carte Fox par Bluetooth
GNU/Linux Magazine France 95 , June 2007
manuscrit slides of the 2007 RMLL conference
J.-M Friedt, C. Ferrandez, G. Martin, S. Guinot, É. Carry, P. Berthelot, M. Griselin
Instrumentation pour l'acquisition automatique de données : application à la capture autonome d'images haute résolution
Société Hydrotechnique de France (SHF), Section de Glaciologie-Nivologie
Grenoble 15 et 16 mars 2007
SHF, Grenoble 2007
including the introduction by M. Griselin (>60 MB)
J.-M Friedt
Introduction à la programmation sur PlayStation Portable
GNU/Linux Magazine France 92 , March 2007
Manuscript
archive des logiciels présentés dans l'article
J.-M Friedt, É. Carry
Introduction to the quartz tuning fork
American Journal of Physics (May 2007), pp.415-422
Manuscript
Proof
I have checked on a network analyzer that the 180 kHz torsional mode (Fig 2) is not observed on an actual tuning fork and is only visible in the model due to ideal electrode geometries which are not patterned practically: the fundamental (32768 Hz) and 3rd overtone (190 kHz) are well resolved though.
P. Sandoz, J.-M Friedt, É. Carry
In-plane rigid-body vibration mode characterization with a nanometer resolution by stroboscopic imaging of a microstructured pattern
Review of Scientific Instruments, vol 78, p.023706 (02/2007)
Manuscript
C. Ferrandez, J.-M Friedt, K.P. Yew, D. Fuin, H. Guyennet
An autonomous sensor platform including a high resolution camera for harsh environments
Rencontres Mondiales du Logiciel Libre 2006 (Nancy)
transparents de la présentation
J.-M Friedt, É. Carry
Prises de vues automatiques
GNU/Linux Magazine France, Hors Série 27 (Octobre 2006)
Manuscript
archive gphoto cross-compilee pour architecture CRIS , a placer sur cle USB pour carte FOX de ACME.
J.-M Friedt, É. Carry
Acquisition et dissémination de trames GPS à des fins de cartographie libre
GNU/Linux Magazine France, Hors Série 27 (Octobre 2006)
Manuscript
Transparents de la présentation faite à Marmottux (2006) et à l'association Gulliver (Rennes, 16/10/2008).

Le circuit électronique incluant le module GPS d'enregistrement des trames (256 heures d'autonomie mémoire, 20 heure d'autonomie en énergie sur 4 piles NiMH rechargeables) est décrit sur ce site
archive des programmes pour ADuC814 et exploitations des donnees NMEA.
Google Earth track example as obtained from my GPS receiver connecter to a MultiMediaCard (MMC), and panorama pictures taken during the trip in Grenoble, France . The same trip presented with the javascript Google Maps interface which does not require the (painful) installation of Google Earth under Linux: this HTML page generated using mostly sed commands and manual editing.
Another example of GPS data processing using a generic KML to Google Maps interface walk near Orleans and in Paris .
Rather than simply displaying the track one can encode a physical quantity in the color of the track, the following example encodes the velocity in the color of the line during a trip in the volcanos (center of France) . The kml file (Google Earth) of the volcano track is also available for comparison.
Finally a direct NMEA to Google Maps interface for displaying this short walk next to the Loire river (France) (and the original NMEA file for generating this path).
L. Francis, J.-M. Friedt, C. Zhou, P. Bertrand
In situ evaluation of density, viscosity and thickness of adsorbed soft layers by combined surface acoustic wave and surface plasmon resonance
Analytical Chemistry 2006; vol. 78(12) (2006), pp. 4200-4209. DOI: ac051233h
manuscript
arXiv cond-mat/0311660
link to ACS web site (requires a subscription)
J.-M. Friedt, L. El Fissi,L. Robert, G. Martin, W. Daniau, S. Ballandras
Capteurs autour des ondes de Love
8ème Congrès Français d'Acoustique), 24-27 April 2006 (Tours, France)
article and slides of the presentations (in French)
S. Guinot, J.-M Friedt
Stockage de masse non-volatile : un block device pour MultiMediaCard
GNU/Linux Magazine France, Hors Série 25 (Avril 2006)
manuscript
archive of all Coldfire 5282 QSPI modules for MMC management for uClinux and SPI emulation on a PC parallel port.
PCB of the MMC to PC parallel port adapter. References on the PCB are from Farnell France (4/4/2006)
Complement to the article: rather than powering the circuit from the PS2 port as presented in the manuscript, we also powered the circuit from a USB port by connecting the two sidemost pins which provide the ground and +5V signals. The PCB also uses an MMC connector rather than an ISA connector.
S. Guinot, J.-M Friedt
La réception d'images météorologiques issues de satellites : utilisation d'un système embarqué
GNU/Linux Magazine France, Hors Série 24 (Février 2006)
manuscript
archive of all Coldfire 5282 QADC modules for uClinux and some sample programs.
J.-M Friedt, S. Guinot
La réception d'images météorologiques issues de satellites : principes de base
GNU/Linux Magazine France, Hors Série 24 (Février 2006)
manuscript
digital version of the images presented in this article
J.-M Friedt, É. Carry
Enregistrement de trames GPS -- développement sur microcontroleur 8051/8052 sous GNU/Linux
GNU/Linux Magazine France, vol 81 (Février 2006)
manuscript
Software archive for programming and using the ADuC814+MMC+GPS receiver (9600 bauds)
J.-M Friedt, S. Guinot
Programmation et interfacage d'un microcontroleur par USB sous linux : le 68HC908JB8
GNU/Linux Magazine France, Hors Série vol 23 (November/Décembre 2005)
manuscript and associated archive including all 68HC908JB8 related software and programming tools. The PCB layout (Cadsoft Eagle file) for the final board used in this project.
J.-M Friedt, S. Guinot
Introduction au Coldfire 5282
GNU/Linux Magazine France, vol 75 (September 2005)
manuscript
J.-M Friedt, C. Mavon, S. Ballandras, V. Blondeau-Patissier, M. Fromm
Quartz resonator based low-energy ionizing radiation detection
RADECS 2005, Cap d'Agde, France, (19-23 September 2005)
poster
article in the proceedings
J.-M. Friedt, L. A. Francis, S. Ballandras
Thickness and Viscosity of Organic Thin Films Probed by Combined Surface Acoustic Love Wave and Surface Plasmon Resonance
2005 IEEE International Ultrasonics Symposium (UFFC), Rotterdam, The Netherlands (18-21 September 2005)
article for the proceedings
slides of the presentation
J.-M. Friedt, S. Alzuaga, N. Ratier, N. Vercelloni, R. Boudot, B. Guichardaz, W. Daniau, V. Laude, S. Ballandras
Design of Asynchronous STW Resonators for Filters and High Stability Source Applications
2005 IEEE International Ultrasonics Symposium (UFFC), Rotterdam, The Netherlands (18-21 September 2005)
article for the proceedings
slides of the presentation
J.-M Friedt, S. Guinot
Introduction to uClinux: low cost embedded-device development environments
What the Hack, Liempde, The Netherlands (5-9 July 2005)
slides
talk (424 MB !)
J.-M Friedt, S. Guinot
Introduction to uClinux: low cost embedded-device development environments
6eme Rencontres Mondiales du Logiciel Libre, Dijon, France (5-9 July 2005)
slides
J.-M Friedt
Satellite image eavesdropping: a multidisciplinary science education project
European Journal of Physics, vol 26 (August 2005) pp.969-984
proof of the article
J.-M Friedt, S. Guinot, É. Carry
Introduction au Coldfire 5272
GNU/Linux Magazine France, vol 73 (June 2005) pp.26-33
manuscript and English translation (with some errors corrected)
A couple of posters in French and in English summarising the same results.
J.-M Friedt, É. Carry
Introduction au diapason à quartz
Bulletin de l'Union des Physiciens n.879 (December 2005)
manuscript
preprint
J.-M Friedt, É. Carry, Z. Sadani, B. Serio, M. Wilm, S. Ballandras
Quartz tuning fork vibration amplitude as a limitation of spatial resolution of shear force microscopes
19th EFTF, Besançon, France (21-24 April 2005)
slides
article for the proceedings
L. Huang, G. Reekmans, D. Saerens, J.-M Friedt, F. Frederix, L. Francis, S. Muyldermans, A. Campitelli, C. Van Hoof,
Prostate-specific antigen immunosensing based on mixed self-assembled monolayers, camel antibodies and colloidal gold enhanced sandwich assays
Biosensors & Bioelectronics, vol. 21, n. 3, (15 September 2005), pp. 483-490
K. Bonroy, J.-M. Friedt, F. Frederix, W. Laureyn, S. Langerock, A. Campitelli, M. Sara, G. Borghs, B. Goddeeris, P. Declerck
Realization and Characterization of Porous Gold for Increased Protein Coverage on Acoustic Sensors
Analytical Chemistry, Vol. 76, n. 15, pp. 4299-4306 (2004)
Proof of the article
C. Zhou, J.-M. Friedt, A. Angelova, K.-H. Choi, W. Laureyn, F. Frederix, L. A. Francis, A. Campitelli, Y. Engelborghs, G. Borghs
Human Immunoglobulin Adsorption Investigated by Means of Quartz Crystal Microbalance Dissipation, Atomic Force Microscopy, Surface Acoustic Wave, and Surface Plasmon Resonance Techniques
Langmuir, Vol. 20, n. 14, pp. 5870-5878 (June 2004)
Proof of the article
error: E. Gizeli mentioned to me an error whose exact expression I cannot remember. I believe this document states that the acoustic losses in an organic layer is independent on the thickness, while the loss should be related to the layer thickness as later stated by L. Francis and al. (whether the viscoelastic or gravimetric effect is predominant is related to the loss/phase shift ratio, not the insertion loss itself).
L. Francis, J.-M Friedt, R. de Palma, C. Zhou, C. Bartic, P. Bertrand, A. Campitelli
Techniques to evaluate the mass sensitivity of Love mode surface acoustic wave biosensors
UFFC, Montreal (Canada), 24-27 August 2004, pp. 241-249
abstract
poster (best student poster award)
L. Francis, J.-M. Friendt, C. Bartic, P. Bertrand, A. Campitelli
A novel biosensor platform integrating Love mode acoustic wave and surface plasmon resonance for the investigation of protein layers
Biosensors 2004, Granada (Spain), 24-26 May 2004
abstract
slides
L. Francis, J.-M Friedt, C. Bartic, A. Campitelli
A SU8 liquid cell for surface acoustic waves biosensors
SPIE Photonics Europe 2004, Strasbourg (France), 26-30 Avril 2004
poster
article for the proceedings
J.-M. Friedt, R. De Palma, W. Laureyn and A. Campitelli
Multiple wavelengths, multiple angles surface plasmon resonance measurements
rejected from Sensors and Actuators A and Applied Optics
text
figure
L. Francis, J.-M. Friedt, R. De Palma, P. Bertrand, A. Campitelli
Influence of electromagnetic interferences on the gravimetric sensitivity of surface acoustic waveguides
Eurosensors XVIII (September 13-15, 2004 - Italy - Rome),
Sensors and Actuators A, Vol. 123-124, pp.360-369 (September 2005)
arXiv physics/0307122
abstract
proof of the article
J.-M Friedt
Cartographie du potentiel électrostatique
Bulletin de l'Union des Physiciens n.864 (May 2004), pp. 691-703
article (in French)
J.-M Friedt
Realization of an optical profiler: introduction to scanning probe microscopy
American Journal of Physics, Vol. 72, n. 8, pp. 1118-1125
manuscript (April 2004)
proof of the article
F. Frederix, J.-M. Friedt, K.-H. Choi, W. Laureyn, A. Campitelli, D. Mondelaers, G. Maes, G. Borghs
Biosensing Based on Light Absorption of Nanoscaled Gold and Silver Particles
Analytical Chemistry 2003; 75(24); 6894-6900 (DOI: ac0346609)
J.-M Friedt, L. Francis, K.-H. Choi, A. Campitelli
The metrology of biosensors: a multiparameter approach to characterizing protein layers
Leiden/Delft/IMEC nanotechnology workshop in Egmond (NL) 1-3 June 2003
poster
J.-M Friedt, L. Francis, G. Reekmans, R. De Palma, A. Campitelli and U.B. Sleytr
Simultaneous surface acoustic wave and surface plasmon resonance measurements: electrodeposition and biological interactions monitoring
Journal of Applied Physics 15 February 2004 -- Volume 95, Issue 4, pp. 1677-1680
manuscript
arXiv cond-mat/0307105
J.-M. Friedt, K.H. Choi, F. Frederix and A. Campitelli
Simultaneous Atomic Force Microscope and Quartz Crystal Microbalance Measurements: Methodology Validation using Electrodeposition
Journal of the Electrochemical Society October 2003 -- Volume 150, Issue 10, pp. H229-H234
final article
12/2013: possible mistake pointed out by H. Perrot (LISE, UPMC) in my assumption that copper sulfate reduction is 100% efficient. He points out that I should have used a Cu counter electrode to keep the concentration of copper ions constant, and a Pt reference electrode (or even better, a true reference electrode, but that was hardly feasible in the allocated space).
J.-M. Friedt, Q. Le Masne, N. Coq, M. Myotte
Réalisation d'un profilomètre optique : introduction à la microscopie à sonde locale
Bulletin de l'Union des Physiciens n.861 (February 2004), pp.265-277
manuscript (in French)
article (in French)
J.-M. Friedt
Introduction à la microbalance à quartz : aspects théoriques et experimentaux
Bulletin de l'Union des Physiciens n.852 (March 2003), pp.429-440
preprint (in French) (color pictures)
article (in French)
J.-M. Friedt, K.-H Choi, L. Francis, F. Frederix, A. Campitelli
Simultaneous AFM and QCM measurements of biological and electrochemical processes
QCM2002, Brighton, UK (24th-25th July 2002)
abstract
poster
J.-M. Friedt, D. Gillet✝, M. Planat
Simultaneous amplitude and frequency noise analysis in Chua's circuit
International Journal of Bifurcation and Chaos (IJBC) in Applied Sciences and Engineering Vol 13, No 8, pp2301-2308 (August 2003)
article
text
figures
A few more pictures of the evolution of the amplitude return map with increasing value of the inductor, obtained after the paper was accepted for publication: graph 1 and graph 2 . Also a picture of the experimental setup
K. H. Choi, J.-M Friedt, F. Frederix, ...
Simultaneous Atomic Force Microscope and Quartz Crystal Microbalance Measurement
Applied Physics Letters (Vol 81, No 7, 12 Aug 2002)
article
K.-H. Choi, J.-M. Friedt, W. Laureyn, F. Frederix, A. Campitelli and G. Borghs
Investigation of protein adsorption with simultaneous measurements of atomic force microscope and quartz crystal microbalance
JVST B (Vol 21, Issue 4, July-Aug. 2003, p.1433)
article
J.-M. Friedt, L. Francis, K.-H. Choi, A. Campitelli
Combined Atomic Force Microscope and Acoustic Wave Devices: Application to Electrodeposition
49th AVS meeting (November 4-8, 2002, Denver, Colorado)
JVST A (Vol 21, Issue 4, July-Aug. 2003, p.1500)
abstract
slides
proof of the article
electronic circuit of the potentiostat used in this work
J.-M Friedt, K. H. Choi, L. Francis, A. Campitelli
Simultaneous Atomic Force Microscope and Quartz Crystal Microbalance measurements: interactions and displacement field of a QCM
Japanese Journal of Applied Physics (Vol 41, No 6A (June 2002), pp.3974-3977)
article
A small tutorial on modulef I wrote while performing the simulation presented in this article.
J.-M. Friedt, K.-H. Choi, F. Frederix, L. Francis, A. Campitelli, G. Borgs
Simultaneous AFM and QCM measurements: application to the adsorption of proteins on metallic surfaces,
IVth Annual Linz Winter Workshop, Linz, Austria (February 1st-4th 2002)
slides
Projet Aurore
Films accélérés : méthodes d'acquisition et traitements
Bulletin de l'Union de Physiciens n.842 (Mars 2002), p.543
preprint (in French) (color pictures)
article (in French)
J.-M Friedt, C. Thiébaud
Micro-nanomanipulation à distance avec rétroaction visuelle et tactile sous MEB par utilisation d'un levier d'AFM piézorésistif [in French]
NMT (2000)
article (in French)
Lancer d'un ballon sonde
Bulletin de l'Union de Physiciens (Juillet-Aout-Septembre 2000), p.1317
article (in French)
J.-M. Friedt, O. Teytaud, M. Planat
Learning from noise in Chua's oscillator
16 th International Conference on Noise in Physical Systems and 1/f Fluctuations (ICNF 2001), Gainesville, Floride, USA (22-25 Octobre 2001) pp.491-496
article
O. Teytaud, J.-M. Friedt, M. Planat
Neural network based prediction of Chua's chaotic circuit frequency -- possible extension to quartz oscillators
15 th EFTF, Neuchatel, Suisse (6-8 Mars 2001), proceedings pp.129-133
J.-M. Friedt, O. Teytaud, D. Gillet✝, M. Planat
Simultaneous amplitude and frequency noise analysis in Chua's circuit -- neural network based prediction and analysis
VIII. Van Der Ziel symposium on quantum 1/f noise ..., St. Louis, Missouri, USA (5-6 Juin 2000)
abstract
proceeding/a>

Jean-Michel Friedt, Michel Planat
Mesures instantanées en fréquence et en amplitude dans le circuit de Chua
Rencontre du non-linéaire 2000 (Paris, France)
abstract (French)
poster (French)
article (in French)
Jean-Michel Friedt, Daniel Gillet✝, Michel Planat
Simultaneous amplitude and frequency noise analysis in Chua's circuit
14th EFTF, Turin, Italie (14-16 Mars 2000)
article
abstract
poster
All data (signal period and amplitude) obtained from my implementation of Chua's circuit and used in these articles are available upon request to friedtj_at_free.fr

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