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Optimum beamformers for uniform circular arrays in a correlated signal environment

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Author

Summary, in English

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.

Publishing year

2000

Language

English

Pages

3093-3096

Publication/Series

2000 IEEE International Conference on Acoustics, Speech, and Signal Processing

Volume

5

Document type

Conference paper

Publisher

IEEE - Institute of Electrical and Electronics Engineers Inc.

Topic

  • Electrical Engineering, Electronic Engineering, Information Engineering

Conference name

IEEE International Conference on Acoustics, Speech and Signal Processing, 2000

Conference date

2000-06-05 - 2000-06-09

Conference place

Istanbul, Turkey

Status

Published

ISBN/ISSN/Other

  • ISBN: 0-7803-6293-4