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학술지 SINR Maximization Beam Selection for mmWave Beamspace MIMO Systems
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저자
Igbafe Orikumhi, 강정완, 좌혜경, 나지현, 김전우
발행일
202010
출처
IEEE Access, v.8, pp.185688-185697
ISSN
2169-3536
출판사
IEEE
DOI
https://dx.doi.org/10.1109/ACCESS.2020.3029257
협약과제
20HH2800, 5G NR 기반 지능형 오픈 스몰셀 기술 개발, 나지현
초록
Beamspace multiple-input multiple-output (MIMO) systems employ beam selection algorithms based on the sparsity of the beamspace channel to reduce the number of radio-frequency chains required in multi-user systems. In this article, we address the problem of selecting multiple beams to each user. Specifically, we propose a beam selection scheme subject to signal to interference plus noise ratio (SINR) maximization. The proposed beamspace beam selection algorithm is developed in two stages. In the first stage, each user is assigned a non-overlapping beam determined by Kuhn-Munkres assignment algorithm. In the second stage, the selected beams in the previous stage are augmented with additional beams from an M-dominant beam set subject to a sum-rate maximization criterion. The performance of the proposed scheme is verified by simulations, and the results show a near-optimal performance in terms of the achievable sumrate. Also, a significant improvement in terms of energy efficiency is achieved compared to the conventional beam selection scheme.
키워드
Beam selection, Beamforming, Beamspace, Massive MIMO, Millimeter wave communications, Multi-user interference
KSP 제안 키워드
Beam space MIMO, Energy Efficiency, First stage, Kuhn-Munkres, Multiuser Interference(MUI), Multiuser system, Radio Frequency(RF), SINR maximization, Sum-rate maximization, beam selection, massive mimo
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