MIMO Multiway Relaying With Pairwise Data Exchange: A Degrees of Freedom Perspective

doi:10.1109/TSP.2014.2347924

	MIMO Multiway Relaying With Pairwise Data Exchange: A Degrees of Freedom Perspective
	Rui Wang 1; Xiaojun Yuan2
	2014-10-15
发表期刊	IEEE TRANSACTIONS ON SIGNAL PROCESSING (IF:4.6[JCR-2023],5.2[5-Year])
ISSN	1053-587X
卷号	62 期号:20 页码:5294-5307
发表状态	已发表
DOI	10.1109/TSP.2014.2347924
摘要	In this paper, we study achievable degrees of freedom (DoF) of a multiple-input multiple-output (MIMO) multiway relay channel (mRC) where K users, each equipped with M antennas, exchange messages in a pairwise manner via a common N-antenna relay node. A novel and systematic way of joint beamforming design at the users and at the relay is proposed to align signals for efficient implementation of physical-layer network coding (PNC). It is shown that, when the user number, K = 3, the proposed beamforming design can achieve the DoF capacity of the considered mRC for (M, N) any setups. For the scenarios with K > 3, we show that the proposed signaling scheme can be improved by disabling a portion of relay antennas so as to align signals more efficiently. Our analysis reveals that the obtained achievable DoF is always piecewise linear, and is bounded either by the number of user antennas M or by the number of relay antennas. Further, we show that the DoF capacity can be achieved for M/N is an element of (0, K-1/K(K-2)] and M/N is an element of [1/K(K-1) + 1/2, infinity), which provides a broader range of the DoF capacity than the existing results. Asymptotic DoF as K -> infinity is also derived based on the proposed signaling scheme.
关键词	Multiple-input multiple-output (MIMO) multiway relay channel (mRC) physical-layer network coding (PNC) signal space alignment
URL	查看原文
收录类别	SCI ; EI
语种	英语
资助项目	University Grants Committee of the Hong Kong Special Administrative Region, China[418712] ; University Grants Committee of the Hong Kong Special Administrative Region, China[AoE/E-02/08]
WOS研究方向	Engineering
WOS类目	Engineering, Electrical & Electronic
WOS记录号	WOS:000341982900008
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
EI入藏号	20161002077092
EI主题词	Antennas ; Beamforming ; Channel coding ; Codes (symbols) ; Degrees of freedom (mechanics) ; Electric relays ; Electronic data interchange ; Feedback control ; Network coding ; Network layers ; Piecewise linear techniques ; Telecommunication repeaters
EI分类号	Electric Components:704.1 ; Electromagnetic Waves in Relation to Various Structures:711.2 ; Information Theory and Signal Processing:716.1 ; Computer Software, Data Handling and Applications:723 ; Data Processing and Image Processing:723.2 ; Control Systems:731.1 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4 ; Mechanics:931.1
WOS关键词	INTERFERENCE CHANNEL ; 2-WAY ; ALIGNMENT ; CAPACITY
原始文献类型	Article
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/2368
专题	信息科学与技术学院信息科学与技术学院_PI研究组_袁晓军组
作者单位	1.Institute of Network Coding, The Chinese University of Hong Kong, Hong Kong 2.School of Information Science and Technology, ShanghaiTech University, Shanghai, China
推荐引用方式 GB/T 7714	Rui Wang,Xiaojun Yuan. MIMO Multiway Relaying With Pairwise Data Exchange: A Degrees of Freedom Perspective[J]. IEEE TRANSACTIONS ON SIGNAL PROCESSING,2014,62(20):5294-5307.
APA	Rui Wang,&Xiaojun Yuan.(2014).MIMO Multiway Relaying With Pairwise Data Exchange: A Degrees of Freedom Perspective.IEEE TRANSACTIONS ON SIGNAL PROCESSING,62(20),5294-5307.
MLA	Rui Wang,et al."MIMO Multiway Relaying With Pairwise Data Exchange: A Degrees of Freedom Perspective".IEEE TRANSACTIONS ON SIGNAL PROCESSING 62.20(2014):5294-5307.