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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Browsing Archive: April, 2009

Solutions / Workarounds / Tweaks

Posted by Ujjval Shah on Wednesday, April 22, 2009, In : Query/Problem/Solution 
Solutions

The solutions provided here mainly discuss how to decrease the processing time. It also addresses some of the issues listed in the previous section.

Reentrant VIs

LabVIEW is a data flow programming tool. It can execute data independent codes in parallel if programmed in such a way. In the simulation there are several instances where a same chunk of code is repeated a number of times. This code is defined as a VI and is called every time the main code wants to utilize it. However by def...

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Simulation Problems and Challenges - A summary

Posted by Ujjval Shah on Wednesday, April 22, 2009, In : Query/Problem/Solution 

Large processing time

The simulation model aims in finding the BER value for various SNR values and plots them on a chart. The processes involving in finding a BER value for a single SNR value are random generation of a large number of symbols, modulation of these symbols using one of the modulation schemes such as PSK, MIMO- STC scheme encoding, generating and applying a Rayleigh flat fading profile to it, generating and adding AWGN to it, decoding, demodulation and BER calculation. Each of...


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SMUX BER vs. SNR curves

Posted by Ujjval Shah on Wednesday, April 22, 2009, In : Simulation 

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MIMO MISO SIMO SISO BER vs. SNR curves

Posted by Ujjval Shah on Wednesday, April 22, 2009, In : Simulation 

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RX Diversity BER vs. SNR curves

Posted by Ujjval Shah on Wednesday, April 22, 2009, In : Simulation 

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SC, MRC BER vs. SNR curves

Posted by Ujjval Shah on Wednesday, April 22, 2009, In : Simulation 

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2x1, 2x2 Alamouti BER vs. SNR curve

Posted by Ujjval Shah on Wednesday, April 22, 2009, In : Simulation 

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GUI - The Front Panel

Posted by Ujjval Shah on Wednesday, April 22, 2009, In : Simulation 

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Generalized Complex Orthogonal Space Time Block Codes

Posted by Ujjval Shah on Tuesday, April 14, 2009, In : Theory 
Some important results:

  1. Rate one generalized complex orthogonal designs do not exist for more than two transmit antennas
  2. The rate of a generalized complex orthogonal design cannot exceed R = 3/4 for more than two antennas
  3. Rate half, R = 0.5, generalized complex orthogonal designs exist for any number of transmit antennas 
  4. For a generator matrix for a given rate and number of antennas, a generator matrix of same rate for number of tranmist antennas less by one can be obtained by simply removin...

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Selection Combining

Posted by Ujjval Shah on Tuesday, April 14, 2009, In : Query/Problem/Solution 
Selection combining involves the process of selecting one of the multiple receiver antennas and thus the communication channel which is least affected by noise.

The question: Is it possible to use this technique if there are more than two transmitter antennas?

My instinct says no, however i need to find out the answer and the reason for it as well.

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edited on 22nd April

well the answer is yes as well as know.
for STBC you need to lock into one receiver antenna only during the tran...
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Spatial Multiplexing

Posted by Ujjval Shah on Friday, April 3, 2009, In : Theory 
Till now most of the concentration was on diversity gains achieved by using both transmit and receive antennas in a multiple-input multiple-output (MIMO) channel. However, multiple transmit antennas can be utilized to achieve other goals as well. A higher capacity and as a result a higher transmission rate is possible by increasing the number of transmit antennas. Assume a MIMO channel with equal number of transmit and receive antennas. Then in a rich scattering environment the capacity incre...

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