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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Showing Tag: "diversity" (Show all posts)

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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Alamouti Encoding with RX Diversity (MRC), BER Curves

Posted by Ujjval Shah on Saturday, March 28, 2009, In : Simulation 
The following result is for Alamouti Encoding with RX diversity using Maximal Ratio Combining technique at the Recevier

Following curves are the expected theoretical curves for various different TX and RX antennas.
The dotted curve for Na=4 is the curve to be compared with the above simulated curve.

Following is a quick comparison of all the three curves simulated till now:



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RX Diversity

Posted by Ujjval Shah on Saturday, March 28, 2009, In : Theory 
RX Diversity means to have multiple antennas at the receiver.

There are basically three types of method to obtain RX Diversity:

  1. Selection Combining (SC): Here the receiver selects the best branch of all the receiver antennas and decodes the signal coming from that antenna. It is suboptimal and doesnt utilizes the energy of the signals from the other antennas.
  2. Maximal Ratio Combining (MRC): Here, the limitation of the SC technique is removed. In MRC, signals from all the antennas are weighted app...

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Diversity Methods

Posted by Ujjval Shah on Friday, February 27, 2009, In : Theory 

The replica of the transmitted signal can be sent through different means [99]. For example, it can be transmitted in a different time slot, a different frequency, a different polarization, or a different antenna. The goal is to send two or more copies of the signal through independent fades. Then, since it is less likely to have all the independent paths in deep fades, using appropriate combining methods, the probability of error will be lower.

  •  Time slot – repetition
  • Frequency – fdd
  • Pol...


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Diversity

Posted by Ujjval Shah on Friday, February 27, 2009, In : Theory 

The main idea behind “diversity” is to provide different replicas of the transmitted signal to the receiver. If these different replicas fade independently, it is less probable to have all copies of the transmitted signal in deep fade simultaneously. Therefore, the receiver can reliably decode the transmitted signal using these received signals. This can be done, for example, by picking the signal with the highest SNR or by combining the multiple received signals. As a result, the probabi...


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