Robust Adaptive Beamforming of Acoustic Vector-sensor Array Based on Least Squares Estimation

doi:10.3969/j.issn.1000-1093.2014.03.013

Abstract

Abstract: The performance of Capon beamformer of acoustic vector-sensor array degrades sharply in the presence of array steering vector mismatch. A robust beamforming algorithm based on least squares estimation is proposed to solve this problem. Several generalized sidelobe cancellers are designed for acoustic pressure channel and vibration velocity channel in consideration of the different error sources of their steering vectors.The Capon beamformer of acoustic vector-sensor array is converted to a robust least-squares estimation problem based on the principle of worst-case performance optimization. The second-order cone programing is adopted to obtain the optimal solution. The simulation results show the efficiency of the proposed algorithm in the cases of steering vector mismatch, snapshot deficiency and sensor attitude error.

Key words: information processing, robust adaptive beamforming, acoustic vector-sensor array, generalized sidelobe canceller, least squares estimation

CLC Number:

TB566

WANG Yan，WU Wen-feng，LIANG Guo-long. Robust Adaptive Beamforming of Acoustic Vector-sensor Array Based on Least Squares Estimation[J]. Acta Armamentarii, 2014, 35(3): 379-384.

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