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5G NR CA-Polar Maximum Likelihood Decoding by GRAND

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arxiv 1907.01077 v2 pith:DWGAAR4X submitted 2019-07-01 cs.IT math.IT

5G NR CA-Polar Maximum Likelihood Decoding by GRAND

classification cs.IT math.IT
keywords grandca-polarcodesdecodingclasscomputationallydecodershere
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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CA-Polar codes have been selected for all control channel communications in 5G NR, but accurate, computationally feasible decoders are still subject to development. Here we report the performance of a recently proposed class of optimally precise Maximum Likelihood (ML) decoders, GRAND, that can be used with any block-code. As published theoretical results indicate that GRAND is computationally efficient for short-length, high-rate codes and 5G CA-Polar codes are in that class, here we consider GRAND's utility for decoding them. Simulation results indicate that decoding of 5G CA-Polar codes by GRAND, and a simple soft detection variant, is a practical possibility.

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