Online Millimeter Wave Phased Array Calibration Based on Channel Estimation

Thomas Moon, Junfeng Gaun, Haitham Hassanieh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper proposes a new over-the-air (OTA) calibration method for millimeter wave phased arrays. Our method leverages the channel estimation process which is a fundamental part of any wireless communication system. By performing the channel estimation while changing the phase of an antenna element, the phase response of the element can be estimated. The relative phase of the phased array can also be obtained by collecting all the estimated phase responses with a shared reference state. Hence, the phase mismatches of the phased array can be resolved. Unlike prior work, our calibration method embraces all the array components such as power-divider, phase shifter, amplifier and antenna and thus, spans the full chain. By overriding channel estimation, our proposed technique does not require any additional circuits for calibration. Furthermore, the calibration can be performed online without the need to pause the communication. We tested our method on an eight element phased array at 24GHz which we designed and fabricated in PCB for verification. The measured beam pattens prove the viability of our proposed method.

Original languageEnglish (US)
Title of host publication2019 IEEE 37th VLSI Test Symposium, VTS 2019
PublisherIEEE Computer Society
ISBN (Electronic)9781728111704
DOIs
StatePublished - Apr 2019
Event37th IEEE VLSI Test Symposium, VTS 2019 - Monterey, United States
Duration: Apr 23 2019Apr 25 2019

Publication series

NameProceedings of the IEEE VLSI Test Symposium
Volume2019-April

Conference

Conference37th IEEE VLSI Test Symposium, VTS 2019
CountryUnited States
CityMonterey
Period4/23/194/25/19

Keywords

  • Beamforming
  • Calibration
  • Millimeter Wave
  • Over-the-air measurement
  • Phased Array

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering

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