Low-Complexity CRC Aided Joint Iterative Detection and SCL Decoding Receiver of Polar Coded SCMA System

As the fifth-generation (5G) wireless networks' key technology, the joint design of SCMA and polar code is concerned by the future communication system. In this paper, a CRC aided joint iterative detection and successive cancellation list (SCL) decoding (CAJIDS) receiver is proposed for the pol...

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Bibliographic Details
Published in:IEEE access Vol. 8; p. 1
Main Authors: Wu, Xi, Wang, Yafeng, Li, Chuanfeng
Format: Journal Article
Language:English
Published: Piscataway IEEE 01.01.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Algorithms
Communications systems
Complexity
Complexity theory
Decoding
distributed CRC aided polar (DCA-polar)
early termination
Error analysis
extrinsic messages
Iterative decoding
Iterative methods
Maximum likelihood decoding
Network latency
NOMA
Polar codes
Receivers
sparse code multiple access (SCMA)
successive cancellation list (SCL)
Wireless networks
ISSN:2169-3536, 2169-3536
Online Access:Get full text
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Summary:As the fifth-generation (5G) wireless networks' key technology, the joint design of SCMA and polar code is concerned by the future communication system. In this paper, a CRC aided joint iterative detection and successive cancellation list (SCL) decoding (CAJIDS) receiver is proposed for the polar coded SCMA (PC-SCMA) system. For the receiver, the SCL decoder's extrinsic messages construction algorithm is designed by using Bayes rule and soft cancellation algorithm. Additionally, the distributed CRC aided polar (DCA-polar) code and variable list size are used to reduce the receiver's decoding latency and complexity. Simulation results demonstrate that the CAJIDS receiver has better error rate performance than the joint iterative detection and decoding (JIDD) receiver. It also outperforms the LDPC coded SCMA (LDPC-SCMA) system. Specifically, when code length N = 256 and code rate R = 1/3, the CAJIDS outperforms the JIDD and LDPC-SCMA 1.2 dB and 1.9 dB over the Rayleigh fading channel, respectively. It also shows that, compared with the fixed-list-size receiver, with a similar error rate performance, the CAJIDS receiver has lower decoding latency and complexity.
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ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2020.3043017