Block Sequential Decoding Techniques for Polar Subcodes
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A reduced complexity sequential decoding algorithm for polar subcodes is described. The proposed approach relies on a decomposition of the polar (sub)code into a number of outer codes, and on-demand construction of codewords of these codes in the descending order of their probability. The proposed algorithm can be also used for decoding of polar codes with CRC and short extended BCH codes. It has lower average decoding complexity compared to the existing decoding algorithms for the corresponding codes.
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