Widely linear generalized sidelobe canceling beamforming with variable diagonal loading |
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| Affiliation: | 1. School of Science, Dalian Jiaotong University, Dalian 116028, China;2. Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, China;1. National Research Center of Railway Safety Assessment, Beijing Jiaotong University, Beijing 100044, China;2. State Key Lab of Rail Traffic Control & Safety, Beijing Jiaotong University, Beijing 100044, China;1. Department of Mathematics and Industrial Engineering, École Polytechnique – Gerad, Montréal, Canada;2. Department of Electrical Engineering, École de Technologie Supérieure, Montréal, Canada |
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| Abstract: | We propose a robust widely linear (WL) beamformer for noncircular (NC) signals in the presence of angle of arrival (AOA) errors or array random perturbations. In our beamformer, the block conjugate structure of covariance matrix is exploited to avoid updating the full weight vector, which reduces the computational loads. We add a variable diagonal loading term in the weight vector to improve the robustness of the WL beamformer. Moreover, the orthogonality constraint of block matrix is not required to calculate the amount of diagonal loading. Computer-simulation results show that the proposed WL beamforming provides improved performance over the conventional linear beamformers for NC signals in the presence of AOA errors and array random perturbations. |
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| Keywords: | Adaptive beamforming Widely linear Mismatch Variable diagonal loading |
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