Achievable Degrees of Freedom of MIMO Multiway Relaying with Pairwise Data Exchange
2014
会议录名称2014 IEEE GLOBAL COMMUNICATIONS CONFERENCE (GLOBECOM 2014)
页码1692-1697
发表状态已发表
DOI10.1109/GLOCOM.2014.7037052
摘要We study achievable degrees of freedom (DoF) of a multi-input multi-output (MIMO) multiway relay channel (mRC) where K users, each equipped with M antennas, exchange messages in a pairwise manner with the help of a single N-antenna relay node. A novel and systematic way of designing beamforming vectors and matrices at the user and at the relay is proposed to realize signal alignment and to implement physicallayer network coding (PNC). It is shown that, for the considered mRC with K = 3 users, the proposed beamforming design achieves the DoF capacity for any (M; N) setups. For the scenarios with K > 3, we show that the proposed 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 N. Asymptotic DoF as K -> infinity is also derived based on the proposed signal alignment scheme.
关键词Relays MIMO Antennas Vectors Uplink Downlink Spatial databases
出版地345 E 47TH ST, NEW YORK, NY 10017 USA
会议地点Austin, TX
会议日期8-12 Dec. 2014
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收录类别CPCI ; EI
语种英语
WOS研究方向Computer Science ; Engineering ; Telecommunications
WOS类目Computer Science, Theory & Methods ; Engineering, Electrical & Electronic ; Telecommunications
WOS记录号WOS:000376235500143
出版者IEEE
EI入藏号20151100632654
EI主题词Antennas ; Beamforming ; Degrees of freedom (mechanics) ; Electronic data interchange ; Mechanics ; MIMO systems ; Network layers ; Piecewise linear techniques ; Television antennas
EI分类号Electronic Circuits:713 ; Telecommunication; Radar, Radio and Television:716 ; Computer Software, Data Handling and Applications:723 ; Data Processing and Image Processing:723.2 ; Automatic Control Principles and Applications:731 ; Control Systems:731.1 ; Control Devices:732 ; Mechanics:931.1 ; Systems Science:961
WOS关键词CHANNEL
原始文献类型Proceedings Paper
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文献类型会议论文
条目标识符https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/2426
专题信息科学与技术学院_PI研究组_袁晓军组
通讯作者Wang, Rui
作者单位
1.Chinese Univ Hong Kong, Inst Network Coding, Hong Kong, Hong Kong, Peoples R China
2.ShanghaiTech Univ, Sch Informat Sci & Technol, Shanghai 200031, Peoples R China
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GB/T 7714
Wang, Rui,Yuan, Xiaojun. Achievable Degrees of Freedom of MIMO Multiway Relaying with Pairwise Data Exchange[C]. 345 E 47TH ST, NEW YORK, NY 10017 USA:IEEE,2014:1692-1697.
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