How to combine 340 sub matrices of 117 by 1 into one matrix of 9945 by 1. I'm working on ofdm(subcarriers=128, cp length=32) and got 117 data carriers. That's why ofdm requires input matrix of 117 by 1

1 次查看(过去 30 天)
kindly tell me how to combine these subsets in one matrix. for example I'm working on following lines.
st=rand(9945,4)
for n=1:85
Baserow = (n-1) * 117;
for n1 = 1:4
Subset = st(Baserow+(1:117),n1, :)
txSig = ofdmMod(Subset);
>> y = awgn(txSig, SNR(k));
>> sigRx = ofdmDemod(y);
end
end
I'm getting 340 sub matrices of "Sigtx" of 117 by 1. How to combine them in a single matrix?
thanku.
  4 个评论
Sajid Sarwar
Sajid Sarwar 2018-11-18
M = 4; % Modulation alphabet
k = log2(M); % Bits/symbol
numSC = 128; % Number of OFDM subcarriers
cpLen = 32; % OFDM cyclic prefix length
ofdmMod = comm.OFDMModulator('FFTLength',numSC,'CyclicPrefixLength',cpLen);
ofdmDemod = comm.OFDMDemodulator('FFTLength',numSC,'CyclicPrefixLength',cpLen);
channel = comm.AWGNChannel('NoiseMethod','Variance', ...
'VarianceSource','Input port');
ofdmDims = info(ofdmMod)
numDC = ofdmDims.DataInputSize(1)
Stephen23
Stephen23 2018-11-19
@Sajid Sarwar: please do NOT post the same question multiple times. It does not make it faster or easier for you to get help on this forum.

请先登录,再进行评论。

回答(1 个)

Stephen23
Stephen23 2018-11-18
编辑:Stephen23 2018-11-18
Add these three lines to your code:
C = cell(4,85);
...
for ii = 1:85
...
for jj = 1:4
sigRx = ...
C{jj,ii} = sigRx;
end
end
V = vertcat(C{:})
  11 个评论
Sajid Sarwar
Sajid Sarwar 2018-11-19
Stephen Cobeldick sir, "combine 340 sub matrices of 117 by 1 into one matrix of 9945 by 4" as follows:
st=rand(9945,4)
for n=1:85
Baserow = (n-1) * 117;
for n1 = 1:4
Subset = st(Baserow+(1:117),n1, :)
txSig = ofdmMod(Subset);
>> y = awgn(txSig, SNR(k));
>> sigRx = ofdmDemod(y);
end
end
then output of sigRx(340 matrices of 117 by 1=9945 by 4
(a_1,1 a_1,2 a_1,3 a_1,4
uptill uptill uptill uptill
a_117,1 a_117,2 a_117,3 a_117,4
uptill uptill uptill uptill
a_9945,1 a_9945,2 a_9945,3 a_9945,4)
i have tried to write a matrix of 9945 by 4, which I required
Stephen23
Stephen23 2018-11-19
编辑:Stephen23 2018-11-19
@Sajid Sarwar: why are you just repeating your comments? So far you have totally ignored anything that I have written: your code does not show any attempt to use what I have shown you in my answer or my comments, so I am not quite sure how I can help you, if you just totally ignore what I write.

请先登录,再进行评论。

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by