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MIMO implementation for OFDMA system

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srksp

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zmcscg matlab

Hi all,

I am trying to implement MIMO for OFDMA system. I dont know how should i generate the channel matrix. and what sort of decoding algorithm to use. It would be very helpful if anyone could give some idea on this. I thought of using 2X2 system.
 

Hi,

srksp said:
Hi all,

I am trying to implement MIMO for OFDMA system. I dont know how should i generate the channel matrix. and what sort of decoding algorithm to use. It would be very helpful if anyone could give some idea on this. I thought of using 2X2 system.
Click to expand...
.


First part of ur question. usually we consider MIMO channel matrix as a zero mean circularly symmetric complex Gaussian (ZMCSCG) random variable, so u can generate in MATLAB this complex random variable very easily with one command as below:
>> complex(rand(mean,variance,NT,NR),rand(mean,variance,NT,NR))

I really can not get second part of your question. What do u mean by decoding algorithm? First you have to encode the signal for transmission. But I am not sure what u really want for the second part, plz explain us may be we can help u bit more.

Cheers

MAK
 

    S

    srksp

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1. Channel matrix:
I believe you are trying to build a MIMO system with Tx and Rx.
You can generate a simple AWGN channel, you can use MATLAB for this. The resultant channel matrix you need apply on your Tx signal. In the Receiver you can use the generated channel matrix!

2. For MIMO decoding, if you are doing as a study/understanding purpose, you can use BELL Lab's V-BLAST algorithm.
 

    S

    srksp

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Hi mkhan and itdl, thanks for your posts. It helped me a lot
 

regarding MIMO u can find information in the book fundamentals of wireless communication by pramod viswanath adn D.Tse
 

mkhan said:
Hi,

srksp said:
Hi all,

I am trying to implement MIMO for OFDMA system. I dont know how should i generate the channel matrix. and what sort of decoding algorithm to use. It would be very helpful if anyone could give some idea on this. I thought of using 2X2 system.
Click to expand...
.


First part of ur question. usually we consider MIMO channel matrix as a zero mean circularly symmetric complex Gaussian (ZMCSCG) random variable, so u can generate in MATLAB this complex random variable very easily with one command as below:
>> complex(rand(mean,variance,NT,NR),rand(mean,variance,NT,NR))

I really can not get second part of your question. What do u mean by decoding algorithm? First you have to encode the signal for transmission. But I am not sure what u really want for the second part, plz explain us may be we can help u bit more.

Cheers

MAK
Click to expand...

Must be a typo
complex(randn(mean,variance,NT,NR),randn(mean,variance,NT,NR))
 

m_ratheesh_k said:
regarding MIMO u can find information in the book fundamentals of wireless communication by pramod viswanath adn D.Tse
Click to expand...
hi fundamentals of wireless communication by pramod viswanath adn D.Tse e book avilable anywhere
 

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