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Puncturing in turbo coder

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awatefawatef

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j'ai une problème :comment faire le puncturing dans turbo coder avec matlab.j'ai le code de turbo code seulemnt sans spuncturing mais j'arrive pas a le développer avec puncture :
len=4;
msg = randi([0 1], len, 1);% Random data
s = RandStream('mt19937ar', 'Seed', 11);
intrlvrIndices = randperm(s, len);

t = poly2trellis(4,[13 15 17], 13);
hTEnc = comm.TurboEncoder('TrellisStructure',t,'InterleaverIndices', intrlvrIndices, PuncturePattern);
code = step(hTEnc,msg);
hTDec = comm.TurboDecoder('TrellisStructure',t,'InterleaverIndices', intrlvrIndices,...
'NumIterations', 4);


decode = step( hTDec, code);
msge=msg'
codee=code'
decodee=decode'
jai besion urgent quelqu'un peut m'aider et merci d'avance
 

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