Optimum beamformers for uniform circular arrays in a correlated signal environment
(2000) IEEE International Conference on Acoustics, Speech and Signal Processing, 2000 5. p.3093-3096- 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... (More)
- 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. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/794716
- author
- Lau, Buon Kiong LU and Leung, Yee Hong
- publishing date
- 2000
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- 2000 IEEE International Conference on Acoustics, Speech, and Signal Processing
- volume
- 5
- pages
- 4 pages
- publisher
- IEEE - Institute of Electrical and Electronics Engineers Inc.
- conference name
- IEEE International Conference on Acoustics, Speech and Signal Processing, 2000
- conference location
- Istanbul, Turkey
- conference dates
- 2000-06-05 - 2000-06-09
- external identifiers
-
- scopus:0033692690
- ISBN
- 0-7803-6293-4
- DOI
- 10.1109/ICASSP.2000.861191
- language
- English
- LU publication?
- no
- id
- ca026bdd-0798-4ebd-8d02-9574dcfbcf50 (old id 794716)
- date added to LUP
- 2016-04-04 09:54:35
- date last changed
- 2022-02-13 18:57:36
@inproceedings{ca026bdd-0798-4ebd-8d02-9574dcfbcf50, 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.}}, author = {{Lau, Buon Kiong and Leung, Yee Hong}}, booktitle = {{2000 IEEE International Conference on Acoustics, Speech, and Signal Processing}}, isbn = {{0-7803-6293-4}}, language = {{eng}}, pages = {{3093--3096}}, publisher = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}}, title = {{Optimum beamformers for uniform circular arrays in a correlated signal environment}}, url = {{https://lup.lub.lu.se/search/files/45967803/2248_3.pdf}}, doi = {{10.1109/ICASSP.2000.861191}}, volume = {{5}}, year = {{2000}}, }