Systematical interpretation method of Reed-Solomon code cascade feedback systematic convolution code
A feedback system and convolutional code technology, applied in the decoding field of channel error correction coding, can solve the problems of insufficient use of soft information and large amount of calculation, and achieve the effect of increasing the amount of effective information, improving performance, and saving the amount of calculation.
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[0048]The semi-soft-decision iterative decoding method of cascaded BCJR and simplified Chase-2 type RS decoding algorithm is characterized in that: first, the convolutional code decoder performs soft-decision decoding to the inner code of the concatenated code; subsequently, The RS code decoder performs the following processing on the deinterleaved APP L value delivered by the convolutional code decoder: (1) reverse the APP L value whose absolute value is within a certain range (if this iteration is the last large iteration , and the previous large iteration did not correct all the errors), then perform BPSK demodulation after hard judgment of the sequence of APP L values; (2) sort the APP L values according to reliability, and get the most unreliable ones ( Generally, it is 2) bits, add an error pattern to these bits each time for decoding, once the decoding result can pass the verification, it is considered that the code word is the correct decoding result, and then convert...
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