About the Turbo Encoder/Decoder in Communication tool box

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snowfish
snowfish 2015-11-26
回答： Mochan Yang 2019-11-15
I ran the simulation using the comm.TurboEncoder/comm.TurboDecoder in Communication tool box with code rate 1/3. But it always shows some error bits after decoding, which makes me confused. Could anybody help me with this issue? Thanks in advance!
I attached my codes below:
N = 10000; bits = randint(N,1); pattern = randperm(N); maxIter = 5;
hTurboEnc = comm.TurboEncoder('TrellisStructure', poly2trellis(4, [13 15], 13),'InterleaverIndicesSource','input port');
hTurboDec = comm.TurboDecoder('TrellisStructure', poly2trellis(4, [13 15], 13),'InterleaverIndicesSource','Input port', 'NumIterations', maxIter);
codedBits = step(hTurboEnc, bits, pattern);
decBits = step(hTurboDec, codedBits, pattern);
e = sum(xor(decBits,bits))

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回答（1 个）

Mochan Yang
Mochan Yang 2019-11-15
  • - codedBits ,,,,, Miuns (-) should be added?????

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