Silicon DSP Corporation has developed all the C code for a full implementation of a multiple MIMO OFDM Block Diagram Modeling and Simulation Systems for both Open Loop and Closed Loop MIMO OFDM systems. The modular architecture uses individual blocks (written in C) for the implementation of the various stages in modulation and demodulation. Subroutines ( C code) are also supplied with Include files shared between blocks and subroutines. See the Block Diagram of a full system here.

The majority of blocks were written in 2006-2007 with major enhancements throughout the years.

In addition, the Capsim® MIMO OFDM Block Diagram system was extensively used in developing the tutorials on MIMO OFDM.

Click here for the MIMO OFDM Tutorial Videos on .

For the development of the fixed point CORDIC Beam Forming MIMO-OFDM the methodology used by Nariankadu D. Hemkumar was used. See the reference below.

      Nariankadu D. Hemkumar, Efficient VLSI Architectures for Matrix Factorization, Ph.D. Dissertation, Rice University, April 1994.

The primary author of the Open-Loop and Closed Loop floating point and fixed point MIMO work was Dr. Sasan Ardalan at Silicon DSP Corporation. See the OFDM repository at for credits on the OFDM blocks and subroutines.

We highly recommend the following paper for the analysis of the performance of MIMO-OFDM systems:

     Jie Gao, O. C. Ozdural, S. H. Ardalan and Huaping Liu, "Performance modeling of MIMO OFDM systems via channel analysis," in IEEE Transactions on Wireless Communications, vol. 5, no. 9, pp. 2358-2362, September 2006

Also see the results of block diagram simulations floating point (LAPACK) versus fixed point CORDIC 2x2 SVD Beam Forming MIMO-OFDM here in this page.

Note that blocks are also provided where instead of fixed point CORDIC, the trigonomic functions are computed in floating point. The blocks help validate the fixed point algorithms.

Note: this repository supports the Text Mode Kernel version of Capsim®. The graphical block diagram is from the soon to be released Capsim® Version 7 which uses Qt® for interactive graphical interface. However, the topology in this Repository are the same. You can use the block names in the screen shot and then use the Capsim® command "to blockname" to go the the block, change parameters and run the simulation. There is a lot of benefit to the non graphical mode in portability and flexibility. The graphical version also supports the text mode operation.

An updated link to Capsim® Version 7 using Qt® will be provided in the Repostory on GitHub. Stay tuned.

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Version 6.2
Running topology  mimo_2x3_eq_equal.t 
model name:  mimo_2x3_eq_equal
...
scatter created file: Scatter0.sct 
scatter created file: Scatter2.sct