channel coding using convolutional code
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clc;
clear;
N=20;
BITS=randint(1,N);
constlength=9;
traceback=5*constlength;
polynomial=[657 435];
trellis = poly2trellis(constlength,polynomial);
x=convenc(BITS,trellis);
SNR=0:2:30;
r1=(pskmod(x,2));
%for k=1:16
Rx_sequence= awgn(r1,0,'measured'); %signal with noise
SNR_of_level=0
r2=pskdemod(Rx_sequence,2);
error=xor(x,r2); %getting number of errors
number_errors=sum(error)
%end
l=vitdec(r2,trellis,traceback,'trunc','hard')
what's wrong
回答（1 个）
Image Analyst
2012-12-15
0 个投票
Well, the failure to tell us what those functions (vitdec, etc.) are or what toolbox they can be found in is one thing that's wrong. Lack of sufficient comments is another. Not telling us what causes you to think there's something wrong is a third. There could be more....
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在 帮助中心 和 File Exchange 中查找有关 Matched Filter and Ambiguity Function 的更多信息
2012-12-15
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