DL CSI Acquisition and Feedback in FDD Massive MIMO via Path Aligning

doi:10.1109/ICUFN.2017.7993807

	DL CSI Acquisition and Feedback in FDD Massive MIMO via Path Aligning
	Luo, Xiliang1 ; Zhang, Xiaoyu1 ; Cai, Penghao1 ; Shen, Cong 2; Hu, Die 3; Qian, Hua 4
	2017
会议录名称	2017 NINTH INTERNATIONAL CONFERENCE ON UBIQUITOUS AND FUTURE NETWORKS (ICUFN 2017)
ISSN	2165-8536
页码	349-354
发表状态	已发表
DOI	10.1109/ICUFN.2017.7993807
摘要	Unlike the time-division duplexing (TDD) systems, the downlink (DL) and uplink (UL) channels are not reciprocal anymore in the case of frequency-division duplexing (FDD). However, some long-term parameters, e.g. the time delays and angles of arrival (AoAs) of the channel paths, still enjoy reciprocity. In this paper, by ef. ciently exploiting the aforementioned limited reciprocity, we address the DL channel state information (CSI) feedback in a practical wideband massive multiple-input multiple-output (MIMO) system operating in the FDD mode. In particular, the base station (BS) can transmit the FFT-based pilots with the carefully-selected phase shifts to align the DL paths. Then the user can rely on the so-called time-domain aggregate channel (TAC) to derive the estimate of the DL CSI. Next, with the knowledge about the second-order statistics of the DL channels, the user is also able to compute feedback of reduced dimensionality. We demonstrate that each user can just feed back one scalar number per DL channel path for the BS to recover the DL CSIs. Comprehensive numerical results corroborate our designs.
关键词	Massive MIMO Frequency-Division Duplexing FDD Channel State Information CSI Feedback Aligning Pilots Time-Division Duplexing TDD Reciprocity
出版地	345 E 47TH ST, NEW YORK, NY 10017 USA
会议地点	Milan
会议日期	4-7 July 2017
URL	查看原文
收录类别	CPCI ; EI
语种	英语
资助项目	Science and Technology Commission Foundation of Shanghai[16511104204]
WOS研究方向	Engineering
WOS类目	Engineering, Electrical & Electronic
WOS记录号	WOS:000425924400073
出版者	IEEE
EI入藏号	20173504088981
EI主题词	Communication channels (information theory) ; Frequency division multiplexing ; MIMO systems ; Mobile telecommunication systems ; Time delay ; Time division multiplexing
EI分类号	Electronic Circuits:713 ; Information Theory and Signal Processing:716.1
WOS关键词	CHANNEL ESTIMATION ; SYSTEMS ; DESIGN
原始文献类型	Proceedings Paper
来源库	IEEE
引用统计	正在获取...
文献类型	会议论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/13277
专题	信息科学与技术学院信息科学与技术学院_PI研究组_罗喜良组信息科学与技术学院_博士生
通讯作者	Luo, Xiliang
作者单位	1.ShanghaiTech Univ, Shanghai, Peoples R China 2.Univ Sci & Technol China, Hefei, Anhui, Peoples R China 3.Fudan Univ, Shanghai, Peoples R China 4.Chinese Acad Sci, Shanghai Adv Res Inst, Shanghai, Peoples R China
第一作者单位	上海科技大学
通讯作者单位	上海科技大学
第一作者的第一单位	上海科技大学
推荐引用方式 GB/T 7714	Luo, Xiliang,Zhang, Xiaoyu,Cai, Penghao,et al. DL CSI Acquisition and Feedback in FDD Massive MIMO via Path Aligning[C]. 345 E 47TH ST, NEW YORK, NY 10017 USA:IEEE,2017:349-354.