DocumentCode :
3331673
Title :
Performance analysis of DOA estimation using uniform circular antenna arrays in the threshold region
Author :
Spencer, N.K. ; Abramovich, Y.I.
Author_Institution :
Signal & Inf. Process. (CSSIP), Cooperative Res. Centre for Sensor, Adelaide, SA, Australia
Volume :
2
fYear :
2004
fDate :
17-21 May 2004
Abstract :
We extend our investigations into the region between "performance breakdown" (threshold) conditions for subspace-based direction-of-arrival (DOA) estimation techniques and maximum likelihood (ML) DOA estimation for uniform circular antenna arrays. Using a new outlier mitigation technique that can be applied to arbitrary geometry arrays, we demonstrate that subspace-based DOA estimation outliers could be reliably rectified up to the point where erroneous DOA estimates start to generate optimally high likelihood ratios (LR). This is a manifestation of the onset of a discontinuity in the ML estimation, which cannot be rectified within the ML paradigm.
Keywords :
antenna arrays; array signal processing; direction-of-arrival estimation; maximum likelihood estimation; DOA estimation; ML estimation discontinuity; arbitrary geometry arrays; direction-of-arrival estimation; maximum likelihood estimation; optimally high likelihood ratios; outlier mitigation technique; performance analysis; performance breakdown; subspace-based estimation; threshold region; uniform circular antenna arrays; Antenna arrays; Australia; Covariance matrix; Direction of arrival estimation; Intelligent sensors; Linear antenna arrays; Maximum likelihood estimation; Multiple signal classification; Performance analysis; Sensor arrays;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on
ISSN :
1520-6149
Print_ISBN :
0-7803-8484-9
Type :
conf
DOI :
10.1109/ICASSP.2004.1326237
Filename :
1326237
Link To Document :
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