Rate-Splitting Multiple Access for Downlink Multiuser MIMO: Precoder Optimization and PHY-Layer Design

doi:10.1109/TCOMM.2021.3138437

	Rate-Splitting Multiple Access for Downlink Multiuser MIMO: Precoder Optimization and PHY-Layer Design
	Anup Mishra 1; Yijie Mao2 ; Onur Dizdar 1; Bruno Clerckx 1
	2022-02-01
发表期刊	IEEE TRANSACTIONS ON COMMUNICATIONS (IF:7.2[JCR-2023],6.3[5-Year])
ISSN	0090-6778
EISSN	1558-0857
卷号	70 期号:2
发表状态	已发表
DOI	10.1109/TCOMM.2021.3138437
摘要	Rate-Splitting Multiple Access (RSMA) has recently appeared as a powerful and robust multiple access and interference management strategy for downlink Multi-user (MU) multi-antenna communications. In this work, we study the precoder design problem for RSMA scheme in downlink MU systems with both perfect and imperfect Channel State Information at the Transmitter (CSIT) and assess the role and benefits of transmitting multiple common streams. Unlike existing works which have considered single-antenna receivers (Multiple-Input Single-Output-MISO), we propose and extend the RSMA framework for multi-antenna receivers (Multiple-Input Multiple-Output-MIMO) and formulate the precoder optimization problem with the aim of maximizing the Weighted Ergodic Sum-Rate (WESR). Precoder optimization is solved using Sample Average Approximation (SAA) together with the proposed vectorization and Weighted Minimum Mean Square Error (WMMSE) based approach. Achievable sum-Degree of Freedom (DoF) of RSMA is derived for the proposed framework as an increasing function of the number of transmitted common and private streams, which is further validated by the Ergodic Sum Rate (ESR) performance using Monte Carlo simulations. Conventional MU-MIMO based on linear precoders and Non-Orthogonal Multiple Access (NOMA) schemes are considered as baselines. Numerical results show that with imperfect CSIT, the sum-DoF and ESR performance of RSMA is superior to those of the two baselines, and is increasing with the number of transmitted common streams. Moreover, by better managing the interference, RSMA not only has significant ESR gains over baseline schemes but is more robust to CSIT inaccuracies, network loads and user deployments.
关键词	MIMO communication NOMA Interference Optimization MISO communication Multiaccess communication Receiving antennas Rate-splitting multiple access (RSMA) interference management imperfect CSIT degree of freedom (DoF) MU-MIMO MIMO MIMO NOMA weighted sum-rate (WSR)
URL	查看原文
收录类别	SCI ; EI ; SCIE
语种	英语
资助项目	U.K. Engineering and Physical Sciences Research Council (EPSRC)["EP/N015312/1","EP/R511547/1"]
WOS研究方向	Engineering ; Telecommunications
WOS类目	Engineering, Electrical & Electronic ; Telecommunications
WOS记录号	WOS:000756827000017
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
来源库	IEEE
引用统计	正在获取...
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/159543
专题	信息科学与技术学院信息科学与技术学院_PI研究组_毛奕婕组
作者单位	1.Department of Electrical and Electronic Engineering, Imperial College London, London, U.K. 2.School of Information Science and Technology, ShanghaiTech University, Shanghai, China
推荐引用方式 GB/T 7714	Anup Mishra,Yijie Mao,Onur Dizdar,et al. Rate-Splitting Multiple Access for Downlink Multiuser MIMO: Precoder Optimization and PHY-Layer Design[J]. IEEE TRANSACTIONS ON COMMUNICATIONS,2022,70(2).
APA	Anup Mishra,Yijie Mao,Onur Dizdar,&Bruno Clerckx.(2022).Rate-Splitting Multiple Access for Downlink Multiuser MIMO: Precoder Optimization and PHY-Layer Design.IEEE TRANSACTIONS ON COMMUNICATIONS,70(2).
MLA	Anup Mishra,et al."Rate-Splitting Multiple Access for Downlink Multiuser MIMO: Precoder Optimization and PHY-Layer Design".IEEE TRANSACTIONS ON COMMUNICATIONS 70.2(2022).