CRC-Aided Adaptive Belief Propagation Decoding of NR LDPC Codes
Xianwen Zhang, Ming Jiang, Mingyang Zhu, Kailin Liu, Chunming Zhao · 2022 IEEE 95th Vehicular Technology Conference: (VTC2022-Spring) · 2022
In this paper, we focus on how to further improve the performance of short block-length low-density parity-check (LDPC) codes, especially the short LDPC codes in 5th generation (5G) New Radio (NR) systems. We propose an enhanced adaptive belief propagation (ABP) decoding algorithm with the assistance of partial cyclic redundancy check (CRC) bits. Meanwhile, the error detection ability can still be guaranteed by the remaining CRC bits and adaptive decoder parameters. Moreover, the proposed partial CRC-aided ABP (CA-ABP) decoding can be combined with the conventional BP decoding to further improve the performance. Simulation results show that compared with the BP decoding our proposed decoding method achieves an improvement in the error-correction performance.