Optimization of Multi-UAV-BS Aided Millimeter-Wave Massive MIMO Networks

Lipeng Zhu, Jun Zhang, Zhenyu Xiao, Robert Schober

Research output: Contribution to journalConference articlepeer-review

9 Citations (Scopus)

Abstract

In this paper, we investigate millimeter-wave (mmWave) massive multiple-input multiple-output (MIMO) networks with multiple unmanned aerial vehicle (UAV) mounted base stations (BSs). Uniform planar arrays are equipped at the UAV-BSs to perform hybrid analog-digital beamforming (BF) for compensation of the high path loss of mmWave channels and for mitigation of intra-cell and/or inter-cell interference. We jointly optimize the UAV-BS positioning, user assignment, and hybrid BF for maximization of the achievable sum rate (ASR) of the users, subject to a minimum rate constraint for each user. A sub-optimal solution for the resulting high-dimensional and non-convex problem is developed by exploiting alternating optimization, successive convex optimization, and combinatorial optimization. Our simulation results verify the convergence of the proposed algorithm and demonstrate significant performance gains compared to two benchmark schemes in terms of the ASR.

Original languageEnglish
Article number9348170
JournalProceedings - IEEE Global Communications Conference, GLOBECOM
Volume2020-January
DOIs
Publication statusPublished - Dec 2020
Event2020 IEEE Global Communications Conference, GLOBECOM 2020 - Virtual, Taipei, Taiwan, Province of China
Duration: 7 Dec 202011 Dec 2020

Keywords

  • UAV communication
  • hybrid beamforming
  • millimeter-wave
  • positioning
  • user assignment

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