Scrambling Function, what I am doing wrong
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Hi,
I am trying write a scrambling program,Summary is as follow -Random data -Scrambling function with x^32 polynomial and e being initial states of 32 bit length. -Modulation -Demodulation -DeScrambling,
Now if I compare the output after the deScrambling it matches for first run but failed for rest. I have tried to clear/release the deScrambling handler and all possible solutions which I can think of.
I need to put Scrambling block into my already build physical layer simulation with other coding and modulation schemes. Code below is just test code which fails to return which is expected from deScrambling object
clc
clear all
N = 2;
px=[1,1,1,0,1,1,0,1,1,0,1,1,1,0,0,0,1,0,0,0,0,0,1,1,0,0,1,0,0,0,0,0,1;];
e= [1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0;];
hSCR = comm.Scrambler(N,px,e);
p=4;
data = randint(p, 5);
for ii=1:p
scrData(ii,:) = step(hSCR, data(ii,:)');
end
hModulator = comm.BPSKModulator;
for ii=1:p
modData(ii,:) = step(hModulator, scrData(ii,:)');
end
hDemod = comm.BPSKDemodulator;
hDSCR = comm.Descrambler(N,px,e);
for ii=1:p
DemodData(ii,:) = step(hDemod, modData(ii,:)');
end
release(hDemod);
hDSCR = comm.Descrambler(N,px,e);
for ii=1:p
deScrData(ii,:) = step(hDSCR, DemodData(ii,:)');
release(hDSCR);
a(ii,:)=isequal(data(ii,:),deScrData(ii,:));
[data(ii,:)' deScrData(ii,:)']
% clear hDSCR;
end
a
1 Comment
Walter Roberson
on 5 Dec 2011
http://www.mathworks.com/matlabcentral/answers/13205-tutorial-how-to-format-your-question-with-markup
Answers (1)
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