Pilot Contamination in Massive MIMO Induced by Timing and Frequency Errors

doi:10.1109/TWC.2018.2825982

	Pilot Contamination in Massive MIMO Induced by Timing and Frequency Errors
	Fuqian Yang 1; Penghao Cai 1; Hua Qian 2; Xiliang Luo3
	2018-07
发表期刊	IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
ISSN	1536-1276
卷号	17 期号:7 页码:4477-4492
发表状态	已发表
DOI	10.1109/TWC.2018.2825982
摘要	Pilot contamination in the uplink (UL) puts asymptotic limits on the downlink (DL) spectral efficiency in time-division duplex (TDD) massive multiple-input multiple-output (MIMO) systems relying on TDD channel reciprocity. Pilot contamination can be induced by the UL pilot reuse across different neighboring cells. In this paper, we show that receiver front-end impairments also contribute to pilot contamination. In particular, we consider a TDD multi-user (MU) massive MIMO orthogonal frequency-division multiplexing (OFDM) system, where either time-division multiplexed (TDM) pilots or frequency-division multiplexed (FDM) pilots are utilized for UL channel sounding. We endeavor to characterize the impacts of the residual timing offsets (TOs) and the carrier frequency offsets (CFOs) on the DL performance of the massive MIMO-OFDM system. Closed-form expressions of the asymptotic DL MU spectral efficiencies are derived in the presence of both TOs and CFOs under different scenarios. Our analytical results reveal how the residual TOs and CFOs destroy the orthogonality among the UL training sequences from different users and give rise to pilot contamination. Specifically, we show that the DL spectral efficiencies become bounded even when the number of antennas goes toward infinity. Furthermore, to alleviate the impacts of TOs and CFOs, we propose different pilot decontamination methods based on our analyses for both the TDM pilots and the FDM pilots. Numerical simulation results corroborate our analyses and designs.
关键词	Massive MIMO carrier frequency offset timing offset pilot contamination OFDM
URL	查看原文
收录类别	SCI ; SCIE ; EI
语种	英语
资助项目	Shanghai Municipality of Science and Technology Commission Rising-Star Program[17QA1403800]
WOS研究方向	Engineering ; Telecommunications
WOS类目	Engineering, Electrical & Electronic ; Telecommunications
WOS记录号	WOS:000438727700018
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
WOS关键词	CHANNEL ESTIMATION ; PERFORMANCE ; SYSTEMS ; IMPACT ; SYNCHRONIZATION ; UPLINK
原始文献类型	Article
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/27394
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
作者单位	1.University of Chinese Academy of Sciences, Beijing, China 2.Chinese Academy of Sciences, Shanghai Advanced Research Institute, Shanghai, China 3.School of Information Science and Technology, ShanghaiTech University, Shanghai, China
推荐引用方式 GB/T 7714	Fuqian Yang,Penghao Cai,Hua Qian,et al. Pilot Contamination in Massive MIMO Induced by Timing and Frequency Errors[J]. IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS,2018,17(7):4477-4492.
APA	Fuqian Yang,Penghao Cai,Hua Qian,&Xiliang Luo.(2018).Pilot Contamination in Massive MIMO Induced by Timing and Frequency Errors.IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS,17(7),4477-4492.
MLA	Fuqian Yang,et al."Pilot Contamination in Massive MIMO Induced by Timing and Frequency Errors".IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS 17.7(2018):4477-4492.