Title :
Robust beamforming with array shape distortion dependent diagonal loading
Author :
Jiang, Biao ; Zhu, Ye ; Sun, Changyu
Author_Institution :
Signal Inf. Process. Lab., Chinese Acad. of Sci., Beijing, China
fDate :
29 Aug.-1 Sept. 2004
Abstract :
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.
Keywords :
array signal processing; covariance matrices; Lagrange multiplier; array shape distortion dependent diagonal loading; received data covariance matrix; robust beamforming; root-finding method; steering vector error; Acoustic distortion; Adaptive arrays; Array signal processing; Covariance matrix; Optimization methods; Robustness; Sensor arrays; Shape; Sonar; Uncertainty;
Conference_Titel :
Communications, 2004 and the 5th International Symposium on Multi-Dimensional Mobile Communications Proceedings. The 2004 Joint Conference of the 10th Asia-Pacific Conference on
Print_ISBN :
0-7803-8601-9
DOI :
10.1109/APCC.2004.1391703
