Need Help: Diversity simulation using MATLAB

[amir_rastegar2003]

diversity combining in matlab

Hi

Suppose we have a SIMO 1x2 syetem and t ,r are respectively the transmission symbol and received symbol. we have:

r1=h1t+n1
r2=h2t+n2 (n1 and n2 are noise terms)

ok. My problem is this:

having r1 and r2 how can i compute the followings:
1- selection combinig
2- equal gain combining
3- maximal ratio combining.

I mean, when I have r1 r2 and h1 and h2 how can i compute the above by MATLAB.

thanks for your help.

 

[changfa]

calculating diversity matlab

Hi

Suppose we have a SIMO 1x2 syetem and t ,r are respectively the transmission symbol and received symbol. we have:

r1=h1t+n1
r2=h2t+n2 (n1 and n2 are noise terms)

ok. My problem is this:

having r1 and r2 how can i compute the followings:
1- selection combinig
2- equal gain combining
3- maximal ratio combining.

I mean, when I have r1 r2 and h1 and h2 how can i compute the above by MATLAB.

thanks for your help.

Just follow the definition of combining. I believe you already know how to simulate BER in SISO system r=hx+n. Then the genralization to SIMO with combining is staightforward. For example, for selection combining you are equivalently facing a SISO link, but the gain of the link is given by max{h1,h2}.

 

[amir_rastegar2003]

matlab code on diversity

hi

thanks for your answer. but in non-coherence detection we don't use channel coefficients. we just use received signals for detection.
thanks.

 

[Sal]

matlab combining diversity

Hi

In order to implement diversity combining you need information about the channel condition. In your noncoherent case you need to know the snr in r1 and r2, which is either obtained from training signas or previous data symbols. with this information you calculate the necessary weights for each branch.

If you think this info is useful click on "helped me" for statistics

Sal

 

[amir_rastegar2003]

multipath diversity matlab

hi

dear, my question is obvoius. having y1 nad y2 how we can do differet combinig methods??

 

[zacktoni]

delay diversity matlab

Come on guys. give the solution. ok, at least give us the flow chart. we'll try to find out how to get the code. please be helpful. thanks guys...

 

[student007]

Re: multipath diversity matlab

hi

dear, my question is obvoius. having y1 nad y2 how we can do differet combinig methods??

Hi, i saw your post and i have the same problem! i saw you posted that years ago, so i guess u have the solution now and you can help me!
i have to implement MRC and SC for 1x2 SIMO System. I do have the received signals but no idea about h (channels)!
plz help, thx!!

 

[shakeel006]

i need SC help.I have implemented the

h1 = min(abs(h_sr1).^2,abs(h_r1d).^2)
h2 = min(abs(h_sr2).^2,abs(h_r2d).^2)
and plotted BER for amplify and forward but the results are not correct.

any help will be thankful