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

Long Dinh Nguyen, Hoang Duong Tuan, Trung Q. Duong, H. Vincent Poor, Lajos Hanzo

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish (US)
Article number9222119
Pages (from-to)914-928
Number of pages15
JournalIEEE Transactions on Communications
Volume69
Issue number2
DOIs
StatePublished - Feb 2021

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Keywords

  • Multi-cell massive MIMO system
  • beamformer design
  • energy efficiency
  • nonconvex optimization
  • quality-of-service
  • user service scheduling

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