Hybrid Beamforming with Variable RF Attenuator for Multi-User mmWave Systems

Jungjoo Lee, Taeseok Oh, Jihwan Moon, Changick Song, Byeongsi Lee, Inkyu Lee

Research output: Contribution to journalArticle

Abstract

In this paper, we propose a novel hybrid beamforming design algorithm in multi-user massive multiple-input-multiple-output millimeter-wave channels. In the proposed structure, we employ variable radio frequency attenuators at each phase shifter which flexibly controls the transmit signal amplitude to achieve the performance of fully digital (FD) precoders. We formulate a power loss minimization problem which can be easily solved via the alternating optimization process. Simulation results demonstrate that the proposed architecture achieves the same performance as the FD scheme with the reduced number of radio frequency chains and the proposed scheme exhibits a 37.4% power gain over conventional methods.

Original languageEnglish
Article number9097913
Pages (from-to)9131-9134
Number of pages4
JournalIEEE Transactions on Vehicular Technology
Volume69
Issue number8
DOIs
Publication statusPublished - 2020 Aug

Keywords

  • Hybrid beamforming
  • millimeter wave systems
  • variable RF attenuator

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Applied Mathematics

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