Frequency-invariant robust adaptive beamforming based on interference covariance matrix reconstruction

查看全文 作　　者：FAN [1]Zhan;LIANG [1]Guolong

机构地区：[1]Science and Technology on Underwater Acoustic Laboratory,Harbin Engineering University

出　　处：《Chinese Journal of Acoustics》索引2014年第33卷第4期,共10页

基　　金：supported by the National Natural Science Foundation of China(51279043,61201411);the Fundamental Research Funds for the Central Universities(HEUCF120502);the National Key Laboratory on Underwater Acoustic Technology Foundation of China(9140C200203110C2001) 摘　　要：Consider the problems of frequency-invariant beampattern optimization and robustness in broadband beamforming.Firstly,a global optimization algorithm,which is based on phase compensation of the array manifolds,is used to construct the frequency-invariant beampattern.Compared with some methods presented recently,the proposed algorithm is not only available to get the global optimal solution,but also simple for physical realization.Meanwhile,a robust adaptive broadband beamforming algorithm is also derived by reconstructing the covariance matrix.The essence of the proposed algorithm is to estimate the space-frequency spectrum using Capon estimator firstly,then integrate over a region separated from the desired signal direction to reconstruct the interference-plus-noise covariance matrix,and finally caleulate the adaptive beamformer weights with the reconstructed matrix.The design of beamformer is formulated as a convex optimization problem to be solved.Simulation results show that the performance of the proposed algorithm is almost always close to the optimal value across a wide range of signal to noise ratios. 关键词：自适应波束形成器协方差矩阵鲁棒性频率干扰全局优化算法宽带波束形成波束形成算法

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Frequency-invariant robust adaptive beamforming based on interference covariance matrix reconstruction

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