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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doaj-2dc23e8aa6df402e8eb7067ddadae4a62021-03-30T04:46:32ZengIEEEIEEE Access2169-35362020-01-01822010822012010.1109/ACCESS.2020.30430179285274Low-Complexity CRC Aided Joint Iterative Detection and SCL Decoding Receiver of Polar Coded SCMA SystemXi Wu0https://orcid.org/0000-0002-1467-4845Yafeng Wang1https://orcid.org/0000-0002-2241-8155Chuanfeng Li2https://orcid.org/0000-0002-0102-2354Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing, ChinaKey Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing, ChinaChina Academy of Information and Communications Technology, Beijing, ChinaAs 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.https://ieeexplore.ieee.org/document/9285274/Sparse code multiple access (SCMA)distributed CRC aided polar (DCA-polar)successive cancellation list (SCL)extrinsic messagesearly termination |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Xi Wu Yafeng Wang Chuanfeng Li |
spellingShingle |
Xi Wu Yafeng Wang Chuanfeng Li Low-Complexity CRC Aided Joint Iterative Detection and SCL Decoding Receiver of Polar Coded SCMA System IEEE Access Sparse code multiple access (SCMA) distributed CRC aided polar (DCA-polar) successive cancellation list (SCL) extrinsic messages early termination |
author_facet |
Xi Wu Yafeng Wang Chuanfeng Li |
author_sort |
Xi Wu |
title |
Low-Complexity CRC Aided Joint Iterative Detection and SCL Decoding Receiver of Polar Coded SCMA System |
title_short |
Low-Complexity CRC Aided Joint Iterative Detection and SCL Decoding Receiver of Polar Coded SCMA System |
title_full |
Low-Complexity CRC Aided Joint Iterative Detection and SCL Decoding Receiver of Polar Coded SCMA System |
title_fullStr |
Low-Complexity CRC Aided Joint Iterative Detection and SCL Decoding Receiver of Polar Coded SCMA System |
title_full_unstemmed |
Low-Complexity CRC Aided Joint Iterative Detection and SCL Decoding Receiver of Polar Coded SCMA System |
title_sort |
low-complexity crc aided joint iterative detection and scl decoding receiver of polar coded scma system |
publisher |
IEEE |
series |
IEEE Access |
issn |
2169-3536 |
publishDate |
2020-01-01 |
description |
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. |
topic |
Sparse code multiple access (SCMA) distributed CRC aided polar (DCA-polar) successive cancellation list (SCL) extrinsic messages early termination |
url |
https://ieeexplore.ieee.org/document/9285274/ |
work_keys_str_mv |
AT xiwu lowcomplexitycrcaidedjointiterativedetectionandscldecodingreceiverofpolarcodedscmasystem AT yafengwang lowcomplexitycrcaidedjointiterativedetectionandscldecodingreceiverofpolarcodedscmasystem AT chuanfengli lowcomplexitycrcaidedjointiterativedetectionandscldecodingreceiverofpolarcodedscmasystem |
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1724181196137562112 |