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| Performance Analysis of Robust Capon Beamforming Based on Uncertainty Set |
| Dai Ling-yan①②; Wang Yong-liang③; Li Rong-feng②; Bao Zheng② |
| ①School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China; ②Key Research Lab, Air Force Radar Academy, Wuhan 430019, China; ③Department of Scientific Research, Air Force Radar Academy, Wuhan 430019, China |
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Abstract Since standard Capon beamformer is susceptible to the steering vector mismatches of the Signal Of Interest(SOI), robust Capon beamforming based on steering vector error uncertainty set is investigated. In the cases that the practical steering vector belongs to a spherical uncertainty set, an approximate closed-form solution to the weight vector is derived with a series of approximate deductions. With the solution, the approximate expressions of the target’s power estimation and the output signal-to-interference-plus-noise ratio are presented for analysis evaluation, which provides insights into the influence factors on performace. The simulation results demonstrate the reasonability of the analysis in this paper.
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Received: 05 December 2008
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2009, Vol. 31 
