Problem with Y vector scaling in an equation for MRC in Matlab

[awan]

I am doing MRC for MIMO in matlab. I mean, this is a very basic question but I am stuck. I am trying to simulate a 2 x 2 systems BER. The equation at receiver I am using is:

y = sqrt(d/M)*s + n

where d is the channel eigen value obtained after SVD. After this I am comparing this y with s symbol by symbol. Idealy the theoratical and practical BER has to match but I am getting always a big difference between matched and theoratical BER.

I know there is something wrong with the Y vector scaling.
So comment how can I improve this thing.

 

[Shwan]

matlab mrc

Hi awan'
To simulate MRC in Matlab should be as follow:
R(t)=y.*conj(fade);
where y is the received signal
fade is the signal passed through multipath channel and AWGN.
If you not understand, please send me your all program in order to correct it.
I hope this will help
shwan

 

[vkekk]

mimo mrc matlab

Hi awan

Pls upload ur main paper....

 

[admoon]

matlab mrc

please i want programe for MRC

thanks

 

[lastminuteproject]

Re: MRC In matlab

Hi,

I programed a MIMO simulator in Matlab but only for MIMO schemes where number of antennas in Tx are the same than in Rx (multiplexing).

I want to improve the model and I'm starting with receive diversity (easier first ), like for example a 1x2 or 1x4 antenna configuration (always for downlink).

To apply receive diversity I can apply MRC, and as Shwan explain this is solved by the next equation:
R(t)=y.*conj(fade);
where y is the received signal
fade is the signal passed through multipath channel and AWGN.

I obtain 'y' thanks to a postprocessing SNR function and I also have a multiphat channel that is only a matrix complex gaussian variables (as many columns and rows as tx and rx).

Sorry but I still don't know how to apply the formula.

For example, for 1x2, i have two received signals, so two 'y', how i can see the SNR gain? the Tx only send one stream, no? so how i can see that the throughput in the receiver is bigger than for a 1x1 configuration?

Thank you in advance

 

[Sadaf Iqbal]

MRC In matlab

hello m sadaf
doing MS in Computer engineering
i have a problem i have 2 tx antenna n 2 rx
now as tx 1 send data to rx1 and rx2 and similiarly tx2 send signal to rx1 and rx2 now rx1 contain two signals now how i could add these two signals in such a way that our data is not lost