Thresholded Wirtinger Flow for Fast Millimeter Wave Beam Alignment

Chao Gan, Jing Yang, Cong Shen

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

Abstract

The objective of this paper is to estimate millimeter wave (mmWave) channels based on the magnitude of the received complex measurements. This is motivated by the observation that in practice, a random carrier frequency offset usually occurs for each transmission and corrupts the phase of the measurement. The problem is cast into a non-convex optimization framework, and solved through a thresholded Wirtinger flow (TWF) based approach. Due to the complex signals involved in the problem, and the constraints imposed by phase shifters, existing design and analysis of TWF are not directly applicable. To overcome these challenges, a structured design of the combiner (precoder) is investigated, which naturally leads to a novel initialization scheme for the TWF algorithm. Simulation results indicate that the proposed approach can successfully recover multiple paths in an mmWave channel and the required number of measurements scales mildly with the dimension of the array size.

Original languageEnglish (US)
Title of host publicationConference Record of the 54th Asilomar Conference on Signals, Systems and Computers, ACSSC 2020
EditorsMichael B. Matthews
PublisherIEEE Computer Society
Pages32-36
Number of pages5
ISBN (Electronic)9780738131269
DOIs
StatePublished - Nov 1 2020
Event54th Asilomar Conference on Signals, Systems and Computers, ACSSC 2020 - Pacific Grove, United States
Duration: Nov 1 2020Nov 5 2020

Publication series

NameConference Record - Asilomar Conference on Signals, Systems and Computers
Volume2020-November
ISSN (Print)1058-6393

Conference

Conference54th Asilomar Conference on Signals, Systems and Computers, ACSSC 2020
Country/TerritoryUnited States
CityPacific Grove
Period11/1/2011/5/20

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Computer Networks and Communications

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