Robust beamforming with array shape distortion dependent diagonal loading

A simple method to adaptively determine the diagonal loading factor for robust beamforming is proposed. The loading factor is acquired based on the information of the steering vector error caused by the array shape distortion, which can be extracted from the received data covariance matrix. Lagrange...

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Bibliographic Details
Published in2004 Joint Conference 10th Asia-Pacific Conference on Communications and 5th International Symposium on Multi-Dimensional Mobile Communications Vol. 1; pp. 305 - 308 vol.1
Main Authors Biao Jiang, Ye Zhu, Changyu Sun
Format Conference Proceeding
LanguageEnglish
Published IEEE 2004
Subjects
Acoustic distortion
Adaptive arrays
Array signal processing
Covariance matrix
Optimization methods
Robustness
Sensor arrays
Shape
Sonar
Uncertainty
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ISBN0780386019
9780780386013
DOI10.1109/APCC.2004.1391703

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Summary:A simple method to adaptively determine the diagonal loading factor for robust beamforming is proposed. The loading factor is acquired based on the information of the steering vector error caused by the array shape distortion, which can be extracted from the received data covariance matrix. Lagrange multiplier and root-finding method are used to optimize the diagonal loading factor. Accordingly, the proposed method is efficient in computation. Simulation and sonar experiment results showed the effectiveness of the proposed method.
ISBN:0780386019
9780780386013
DOI:10.1109/APCC.2004.1391703