INCOHERENT SYNTHESIS OF SPARSE BROADBAND ARRAYS BASED ON A PARAMETER-FREE SUBSPACE CLUSTERING

Guy Gubnitsky, Yaakov Buchris, Israel Cohen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, we propose an incoherent design method of sparse broadband arrays that optimizes the number of sensors and their positions simultaneously. We introduce an iterative clustering procedure that merges different groups of sensors with a small distance, in terms of Bhattacharyya distance, between their angle distributions. The iterative clustering procedure is initialized with a large number of groups of sensors, and computes in each iteration a clustering score and a threshold. Then, near groups are merged into joint groups, yielding a new set of groups of sensors. We show that the optimal set of sensors is obtained when the clustering score is larger than the threshold, indicating that the remaining groups are distant. The proposed approach is demonstrated by a design of a superdirective beamformer, and its performance is compared with an existing incoherent approach. Experimental results show improved performance in terms of a more favorable tradeoff between directivity factor and white noise gain.

Original languageEnglish
Title of host publication2022 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2022 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages4968-4972
Number of pages5
ISBN (Electronic)9781665405409
DOIs
StatePublished - 2022
Event47th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2022 - Virtual, Online, Singapore
Duration: 23 May 202227 May 2022

Publication series

NameICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
Volume2022-May
ISSN (Print)1520-6149

Conference

Conference47th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2022
Country/TerritorySingapore
CityVirtual, Online
Period23/05/2227/05/22

Bibliographical note

Publisher Copyright:
© 2022 IEEE

Keywords

  • frequency-invariant beamformers
  • Sparse arrays
  • subspace clustering

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering

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