HIGH-PERFORMANCE SCL BIT-FLIP DECODER FOR CONCATENATED POLAR CODES

Abstract: a method of encoding a concatenated polar code is provided, including evaluating channel reliabilities; selecting channels based on each channel's relative reliability; constructing a polar code of information bits arranged with a front and a rear; attaching additional cyclic redundancy checking (crc) bits to the rear of the information bits; inserting parity bits at proper locations to yield a bit string; feeding the bit string into a polar encoder; and obtaining a codeword. a successive cancellation list and bit flipping decoding method for concatenated polar code also is provided, including initializing a llr of the codeword; screening paths; performing a crc check on the screened paths and if the crc check is not met; determining, in response to the crc check not being met, at least one most unreliable bit based on a revised critical set (rcs); reversing a previous decision if the most unreliable bit was previously selected; and restarting the decoding method.

Inventor(s): Mo HAO, Linglong DAI, Jieao ZHU, Zhongzhichao WAN, Richard MACKENZIE

CPC Classification: H03M13/2906 (CODING; DECODING; CODE CONVERSION IN GENERAL (using fluidic means ; optical analogue/digital converters ; coding, decoding or code conversion, specially adapted for particular applications, see the relevant subclasses, e.g. , , , , , , , , , , , ; ciphering or deciphering for cryptography or other purposes involving the need for secrecy ))

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