Cyclic decoding for cascaded forward error-correction FEC codes
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United States of America Patent
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May 10, 2016
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Oct 16, 2014
app pub date -
Apr 10, 2014
filing date -
Apr 11, 2013
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Abstract
A computer implemented method for a cyclic (forward-backward) decoding for a forward error-correction FEC scheme includes decoding a given k−1th codeword in a block code of length N in an optical communication system, forwarding M symbols' enhanced log likelihood ratios LLRs produced by decoding the k−1th codeword, decoding the kth codeword together with forwarded M symbols' enhanced LLRS, and feeding backward, to the initial step i) decoding, corresponding overlapped M symbols' enhanced LLRs for decoding of the k−1th codeword again.
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