Increasing the Sum-Throughput of Cells With a Sectorization Method for Massive MIMO

In massive multiple-input multiple-output time division duplex systems, the number of users simultaneously served by the base station (BS) is heavily limited if uplink orthogonal pilots are used. This difficulty can be alleviated by introducing non-orthogonal pilots through exploiting second-order c...

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Bibliographic Details
Published inIEEE communications letters Vol. 18; no. 10; pp. 1827 - 1830
Main Authors He, Qiang, Xiao, Limin, Zhong, Xiaofeng, Zhou, Shidong
Format Journal Article
LanguageEnglish
Published IEEE 01.10.2014
Subjects
Antennas
Arrays
Channel estimation
Coherence
MIMO
Uplink
Vectors
massive MIMO
sectorization
sum-throughput
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Summary:In massive multiple-input multiple-output time division duplex systems, the number of users simultaneously served by the base station (BS) is heavily limited if uplink orthogonal pilots are used. This difficulty can be alleviated by introducing non-orthogonal pilots through exploiting second-order channel statistics and sectorization. In this paper, we consider the large uniform linear array and propose a novel sectorization method with low complexity, in which multiple users per sector can be simultaneously served as if there were multiple BS antennas with identical directional characteristics in each sector. Numerical results show that the sum-throughput can be greatly increased compared to the typical massive MIMO architecture.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2014.2346483