NDLI: Pilot scheduling schemes for multi-cell massive multiple-input

Content Provider	IET Digital Library
Author	Jin, Shi Li, Mingmei Huang, Yongming Du, Yinggang Gao, Xiqi
Abstract	This study addresses the pilot scheduling problem in multiuser multi-cell massive multiple-input–multiple-output (MIMO) systems, aiming at mitigating the inter-cell interference (pilot contamination), which constitutes a bottleneck of the system performance. First, the authors investigate the pilot reuse and scheduling problem in cellular systems with unlimited number of base station antennas, only considering the large fading coefficients. Three low-complexity pilot scheduling schemes are then proposed by maximising the system achievable sum rate, including the greedy algorithm, the tabu search (TS) algorithm and the greedy TS algorithm. Second, they investigate the pilot reuse problem among the inter-cell user terminals (UTs) under spatially correlated channels for massive MIMO transmission, trying to distinguish UTs sharing the same time-frequency resources from the spatial domain. A closed-form expression of the non-asymptotic downlink achievable rate is derived by exploiting the second-order channel statistical information. On the basis of the degree of the UTs’ covariance matrices overlap with each other, they further propose a spatial orthogonality-based greedy pilot scheduling algorithm. The proposed approaches can provide much better performance in the presence of pilot contamination. Theoretical analysis and numerical results both verify the effectiveness of the proposed algorithms.
Starting Page	689
Ending Page	700
Page Count	12
ISSN	17518628
Volume Number	9
e-ISSN	17518636
Issue Number	Issue 5, Mar (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/9/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2014.0842
Journal	IET Communications
Publisher Date	2015-02-09
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Antenna Array Base Station Antenna Cellular Radio Cellular System Closed-form Expression Combinatorial Mathematics Covariance Matrices Fading Coefficient Greedy Algorithm Greedy TS Algorithm Intercell Interference Mitigation Intercell User Terminal Interference Suppression Linear Algebra Low-complexity Pilot Scheduling Scheme Massive MIMO Transmission MIMO Communication Mobile Radio System Multi-access System Multiuser Multicell Massive Multiple Input Multiple Output Transmission Nonasymptotic Downlink Numerical Analysis Optimisation Technique Orthogonality-based Greedy Pilot Scheduling Algorithm Pilot Contamination Pilot Reuse Radio Frequency Interference Search Problem Second-order Channel Statistical Information Spatial Domain Statistical Analysis Statistics Sum Rate Maximisation Tabu Search Algorithm Telecommunication Scheduling Time-frequency Analysis Time-frequency Resource UT Covariance Matrix Wireless Channel
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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