An Adaptive Fusion Successive Cancellation List Decoder for Polar Codes with Cyclic Redundancy Check

Yuhuan WANG  Hang YIN  Zhanxin YANG  Yansong LV  Lu SI  Xinle YU  

IEICE TRANSACTIONS on Communications   Vol.E103-B   No.1   pp.43-51
Publication Date: 2020/01/01
Publicized: 2019/07/08
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2019EBP3031
Type of Manuscript: PAPER
Category: Fundamental Theories for Communications
polar codes,  Gaussian approximation,  adaptive fusion successive cancellation list decoder,  probability threshold,  

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In this paper, we propose an adaptive fusion successive cancellation list decoder (ADF-SCL) for polar codes with single cyclic redundancy check. The proposed ADF-SCL decoder reasonably avoids unnecessary calculations by selecting the successive cancellation (SC) decoder or the adaptive successive cancellation list (AD-SCL) decoder depending on a log-likelihood ratio (LLR) threshold in the decoding process. Simulation results show that compared to the AD-SCL decoder, the proposed decoder can achieve significant reduction of the average complexity in the low signal-to-noise ratio (SNR) region without degradation of the performance. When Lmax=32 and Eb/N0=0.5dB, the average complexity of the proposed decoder is 14.23% lower than that of the AD-SCL decoder.