[英]bit error rate calculation 15,11 hamming code graph
下面,我的代碼中是假設找到模擬BER。 但是我在此代碼上遇到錯誤,其中nErrors = biterr(dataIn,dataDec2)
此行給出矩陣尺寸不匹配。
有誰可以幫助我嗎?
close all;
clear all;
M = 2; % Modulation order
k = log2(M); % Bits per symbol
EbNoVec = -4:2:0; % Eb/No values (dB)
No = -10;
numSymPerFrame = 100; % Number of PSK symbols per frame
berEst2 = zeros(size(EbNoVec));
G2=[1 1 0 0 1 0 0 0 0 0 0 0 0 0 0;
0 1 1 0 0 1 0 0 0 0 0 0 0 0 0;
0 0 1 1 0 0 1 0 0 0 0 0 0 0 0;
1 0 1 0 0 0 0 1 0 0 0 0 0 0 0;
1 0 0 1 0 0 0 0 1 0 0 0 0 0 0;
0 1 0 1 0 0 0 0 0 1 0 0 0 0 0;
1 1 1 0 0 0 0 0 0 0 1 0 0 0 0;
0 1 1 1 0 0 0 0 0 0 0 1 0 0 0;
1 0 1 1 0 0 0 0 0 0 0 0 1 0 0;
1 1 0 1 0 0 0 0 0 0 0 0 0 1 0;
1 1 1 1 0 0 0 0 0 0 0 0 0 0 1 ];
H2= gen2par(G2);
decoding2 = syndtable(H2);
Pt2 = zeros(size(EbNoVec));
for n = 1:length(EbNoVec)
% Convert Eb/No to SNR
snrdB = EbNoVec(n) + 10*log10(15/11);
% Reset the error and bit counters
numErrs = 0;
numBits = 0;
Pt2(n)= 10^((snrdB-10)/10);
while numErrs < 100
% Generate binary data and convert to symbols
dataIn = randi([0 1],numSymPerFrame,k)
dataSym = bi2de(dataIn)
dataEnc2 = encode(dataIn,15,11,'linear/binary',G2)
% PSK modulation
txSig = pskmod(dataEnc2,M);
% Pass through AWGN channel
rxSig = awgn(txSig,snrdB,'measured');
% Demodulate the noisy signal
rxSym = pskdemod(rxSig,M);
% Convert received symbols to bits
dataOut = de2bi(rxSym,k);
dataDec2 =decode(rxSym,15,11,'linear/binary',G2, decoding2);
% Calculate the number of bit errors
nErrors = biterr(dataIn,dataDec2);
% Increment the error and bit counters
numErrs = numErrs + nErrors;
numBits = numBits + numSymPerFrame*k;
end
% Estimate the BER
berEst2(n) = numErrs/numBits;
end
berTheory2 = berawgn(EbNoVec,'psk',M,'nondiff');
hold on
semilogy(EbNoVec,berEst1,'r','LineWidth',2);
我在第46行[nErrors = biterr(dataIn,dataDec2)]上使用斷點調試了您的代碼。 似乎dataIn數組是100 x 1,dataDec2是110 x 1數組。 'biterr'函數計算長度相等的兩個向量不同的位置數。
這將為您提供更好的解釋。 https://www.mathworks.com/help/comm/ref/biterr.html
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