Research Article
Iterative Detection and Decoding for Spatially Coupled Multiuser Data Transmission
@INPROCEEDINGS{10.1007/978-3-319-66625-9_22, author={Xiaodan Wang and Sijie Wang and Zhongwei Si and Zhiqiang He and Kai Niu and Chao Dong}, title={Iterative Detection and Decoding for Spatially Coupled Multiuser Data Transmission}, proceedings={Communications and Networking. 11th EAI International Conference, ChinaCom 2016, Chongqing, China, September 24-26, 2016, Proceedings, Part I}, proceedings_a={CHINACOM}, year={2017}, month={10}, keywords={NOMA Spatially coupling Message-passing Iterative Detection and decoding}, doi={10.1007/978-3-319-66625-9_22} }- Xiaodan Wang
Sijie Wang
Zhongwei Si
Zhiqiang He
Kai Niu
Chao Dong
Year: 2017
Iterative Detection and Decoding for Spatially Coupled Multiuser Data Transmission
CHINACOM
Springer
DOI: 10.1007/978-3-319-66625-9_22
Abstract
Non-orthogonal multiple access (NOMA) is a candidate multiple access scheme for 5G wireless communication. In this paper we consider applying the principle of spatially coupling in a NOMA system, where coupled data streams from different users transmit via the additive white Gaussian noise (AWGN) multiple access channel. A data stream is constructed by replicating each encoded bit for several times and then permuting the replicated bits. We propose an message-passing algorithm (MPA) based iterative multiuser detection combining with channel decoding, which is illustrated and analysed by the factor graph representation and the extrinsic information transfer (EXIT) chart, respectively. Numerical results show that lower node degree of the spatially coupled structure, higher number of iterations of the detector, and an appropriate encoding/decoding scheme jointly contribute to a better performance of the multiuser transmission system.
