Optimal DoF Region for the Asymmetric Two-Pair MIMO Two-Way Relay Channel

doi:10.1109/TSP.2016.2639458

	Optimal DoF Region for the Asymmetric Two-Pair MIMO Two-Way Relay Channel
	Kangqi Liu 1; Meixia Tao 1; Xiaojun Yuan2
	2017
发表期刊	IEEE TRANSACTIONS ON SIGNAL PROCESSING
ISSN	1053-587X
卷号	65 期号:7 页码:1700-1711
发表状态	已发表
DOI	10.1109/TSP.2016.2639458
摘要	In this paper, we study the optimal degrees of freedom (DoF) region for the two-pair MIMO two-way relay channel (TWRC) with asymmetric antenna setting, where two pairs of users exchange information with the help of a common relay. Each user i is equipped with M-i antennas, for i=1,2,3,4, and the relay is equipped with N antennas. First, we prove the converse of the DoF region by using the cut-set theorem and the genie-message approach. Then, we present new transmission schemes to achieve the optimal DoF region at different antenna configurations. Due to the asymmetric data exchange, where the two users in each pair can communicate a different number of data streams, we not only need to form the network-coded symbols but also need to process the additional asymmetric data streams at the relay. This is realized through the joint design of relay compression matrix and source precoding matrices. After obtaining the optimal DoF region, we study the optimal sum DoF by solving a linear programing problem. Our DoF analysis reveals that in the asymmetric antenna setting, some antennas at certain source nodes are redundant and cannot contribute to enlarge the DoF region. It is also found that there is no loss of optimality in terms of the sum DoF by enforcing symmetric data exchange within each user pair. © 2016 IEEE.
关键词	Multiple-input multiple-output two-way relay channel interference alignment physical-layer network coding signal alignment degrees of freedom
URL	查看原文
收录类别	CPCI ; SCI ; EI
语种	英语
资助项目	Norsk Sykepleierforbund[] ; Norsk Sykepleierforbund[61322102] ; Norsk Sykepleierforbund[61329101] ; Norsk Sykepleierforbund[61471241]
WOS研究方向	Engineering
WOS类目	Engineering, Electrical & Electronic
WOS记录号	WOS:000395484200005
出版者	Institute of Electrical and Electronics Engineers Inc.
EI入藏号	20171103439050
EI主题词	Antennas
EI分类号	Electric Components:704.1 ; Information Theory and Signal Processing:716.1 ; Computer Software, Data Handling and Applications:723 ; Algebra:921.1 ; Mechanics:931.1
WOS关键词	Y CHANNEL ; INTERFERENCE ALIGNMENT ; ACHIEVABLE DEGREES ; FREEDOM ; CAPACITY ; COMMUNICATION ; PERSPECTIVE ; NETWORKS
来源库	IEEE
引用统计
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/1448
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.Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, China 2.School of Information Science and Technology, ShanghaiTech University, Shanghai, China
推荐引用方式 GB/T 7714	Kangqi Liu,Meixia Tao,Xiaojun Yuan. Optimal DoF Region for the Asymmetric Two-Pair MIMO Two-Way Relay Channel[J]. IEEE TRANSACTIONS ON SIGNAL PROCESSING,2017,65(7):1700-1711.
APA	Kangqi Liu,Meixia Tao,&Xiaojun Yuan.(2017).Optimal DoF Region for the Asymmetric Two-Pair MIMO Two-Way Relay Channel.IEEE TRANSACTIONS ON SIGNAL PROCESSING,65(7),1700-1711.
MLA	Kangqi Liu,et al."Optimal DoF Region for the Asymmetric Two-Pair MIMO Two-Way Relay Channel".IEEE TRANSACTIONS ON SIGNAL PROCESSING 65.7(2017):1700-1711.