Advanced

Optimum beamformers for uniform circular arrays in a correlated signal environment

Lau, Buon Kiong LU and Leung, Yee Hong (2000) IEEE International Conference on Acoustics, Speech and Signal Processing, 2000 In 2000 IEEE International Conference on Acoustics, Speech, and Signal Processing 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:
author
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
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
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
2007-12-27 08:59:13
date last changed
2018-06-13 12:03:27
@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          = {http://dx.doi.org/10.1109/ICASSP.2000.861191},
  volume       = {5},
  year         = {2000},
}