A Soft Cancellation Decoder for Parity-Check Polar Codes
Abstract
Polar codes has been selected as the channel coding scheme for 5G new radio (NR) control channel. Specifically, a special type of parity-check polar (PC-Polar) codes was adopted in uplink control information (UCI). In this paper, we propose a parity-check soft-cancellation (PC-SCAN) algorithm and its simplified version to decode PC-Polar codes. The potential benefits are two-fold. First, PC-SCAN can provide soft output for PC-Polar codes, which is essential for advanced turbo receivers. Second, the decoding performance is better than that of successive cancellation (SC). This is due to the fact that parity-check constraints can be exploited by PC-SCAN to enhance the reliability of other information bits over the iterations. Moreover, we describe a cyclic-shift-register (CSR) based implementation "CSR-SCAN" to reduce both hardware cost and latency with minimum performance loss.
Keywords
Cite
@article{arxiv.2003.08640,
title = {A Soft Cancellation Decoder for Parity-Check Polar Codes},
author = {Jiajie Tong and Huazi Zhang and Xianbin Wang and Shengchen Dai and Rong Li and Jun Wang},
journal= {arXiv preprint arXiv:2003.08640},
year = {2020}
}
Comments
8 pages, 14 figures, short version accepted by IEEE PIMRC 2020