Simulation of a Multiple Input Multiple Output (MIMO) system using various Space Time Coding (STC) techniques in LabVIEW
(Undergraduation Major Project Thesis)

Click Here to  view the top level graphical user interface of the MIMO Simulation Model.

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Download the stand-alone software developed as a part of the undergraduate thesis.

Required: LabVIEW Runtime Engine 2009 or later

MIMO Simulation Model.rar MIMO Simulation Model.rar
Size : 2.351 Kb
Type : rar

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BER Curves for Alamouti scheme, smoothed out

Posted by Ujjval Shah on Wednesday, March 18, 2009 In : Simulation 
The BER curves in the previous posts were plotted with the Fading and AWGN profile varying with each iteration and Eb/No value. Hence the graph had abrupt changes when the channel used to suddenly dive deep blotting out the signal, thus making the comparison for various Eb/No value difficult. Moreover a number of iterations had to be taken and mean was required to find out to get the most suitable reading; this resulted into lot of compuatational time.

Hence to avoid this a constant fading pro...

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BER Curves for Alamouti scheme

Posted by Ujjval Shah on Monday, March 16, 2009 In : Simulation 
The BER curves donot follow exactly as per the ones published in the book i am referring to, however they do resemble them. moreover the performance after using alamouti scheme does increases but not significantly as per the book. i have attached the pics of simulated curves. they were taken with 3.5K no of symbols, 10Hz symbol rate, 1 Hz doppler spread, 8 samples per symbol and mean of 20 iterations per SNR value. These values gives a very good result but the time taken for it outrageously l...

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Alamouti Encoding-Decoding 2

Posted by Ujjval Shah on Sunday, March 8, 2009 In : Simulation 
The simulation is complete.
As discussed in previous post, the entire simulation of a siso and mimo (with alamouti scheme) has been done.

Entire simulation is done for QAM Modulation. But the same can be realised for other modulation schemes too as only the values of the complex symbols (values I and Q) are going to change with modulation scheme and the Alamouti encoding remaining constant.

Two major impairments are included in the simulation- The Additive White Guassian Noise (AWGN) and Rayleig...

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Alamouti Encoding-Decoding

Posted by Ujjval Shah on Sunday, March 1, 2009 In : Query/Problem/Solution 
Previously, i had already developed a code to encode complex constellation symbols into alamouti codes for two transmit antennas.

For the decoding process at the receiver (only one antenna currently) i am using the maximum likelihood receiver (mlr) algorithm for finding the original transmitted symbols. To find the advantage of using alamouti code i am comparing it with a siso transmission system. in this case i am using the QAM transreceiver example provided by NI. however besides the given A...

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Meeting with Prof A. S. Ranade

Posted by Ujjval Shah on Saturday, February 28, 2009 In : Meetings/Phone Conversations/Mails 

Today I had an hour long meeting with Prof. A. S. Ranade. It was the first official meeting where we discussed the project. I started off from point 0 – explaining what MIMO is. Then we moved on to ‘Diversity’- i.e. in a nutshell- sending replicas of signal to achiever better performance, which is the main idea behind mimo. Space Diversity being the area of interest in this project, we discussed what physical ways of achieving it are. Following that we discussed the two techniques of Ma...


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