Energy-Efficient Multi-Cell Massive MIMO Subject to Minimum User-Rate Constraints

The capability of massive multiple-input multiple-output (mMIMO) systems supporting the throughput requirement of as many users as possible is investigated. The bottleneck of serving small numbers of users by a large number of transmit antennas in conventional mMIMO is unblocked by a new time-fracti...

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Bibliographic Details
Published in:IEEE transactions on communications 2021-02, Vol.69 (2), p.914-928
Main Authors: Nguyen, Long Dinh, Tuan, Hoang Duong, Duong, Trung Q., Poor, H. Vincent, Hanzo, Lajos
Format: Article
Language:English
Subjects:
Antennas
Array signal processing
beamformer design
Beamforming
energy efficiency
Intercell interference
Massive MIMO
Multi-cell massive MIMO system
nonconvex optimization
Quality of service
Signal transmission
Throughput
Transmitting antennas
user service scheduling
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Summary:The capability of massive multiple-input multiple-output (mMIMO) systems supporting the throughput requirement of as many users as possible is investigated. The bottleneck of serving small numbers of users by a large number of transmit antennas in conventional mMIMO is unblocked by a new time-fraction-wise beamforming technique, which focuses signal transmission in fractions of a time slot. Based on this time-fraction-wise signal transmission, a new user service scheduling scheme for multi-cell mMIMO, whose cell-edge users suffer not only poor channel conditions but also multi-cell interference, is proposed to support a large user-population. We demonstrate that the numbers of users served by our multi-cell mMIMO within a time-slot may be as high as twice the number of its transmit antennas.
ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2020.3030780