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  

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

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Summary: 
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.