Optimum beamformers for uniform circular arrays in a correlated signal environment

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Abstract

By virtue of their geometry, uniform circular arrays (UCAs) are ideally suited to provide 360 degrees of coverage in the azimuthal plane. However, in a correlated signal environment, the well-known technique of spatial smoothing to mitigate the signal cancellation effect as seen in an optimum beamformer will not work since this technique is applicable only to uniform linear arrays. We show how the transformation of Davies (1965) can be adopted to design optimum beamformers for UCAs in a correlated signal environment. We also introduce derivative constraints to improve the robustness of the optimum beamformers to mismatches between the beamformers' look direction and the actual direction-of-arrival of the desired signal. The effectiveness of our design method is illustrated by a numerical example.

Details

Authors
External organisations
  • Curtin University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Electrical Engineering, Electronic Engineering, Information Engineering
Original languageEnglish
Title of host publication2000 IEEE International Conference on Acoustics, Speech, and Signal Processing
PublisherIEEE--Institute of Electrical and Electronics Engineers Inc.
Pages3093-3096
Number of pages4
Volume5
ISBN (Print)0-7803-6293-4
StatePublished - 2000
Peer-reviewedYes
Externally publishedYes
EventIEEE International Conference on Acoustics, Speech and Signal Processing, 2000 - ISTANBUL, TURKEY, Istanbul, Turkey
Duration: 2000 Jun 52000 Jun 9

Conference

ConferenceIEEE International Conference on Acoustics, Speech and Signal Processing, 2000
Abbreviated titleICASSP2000
CountryTurkey
CityIstanbul
Period2000/06/052000/06/09

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