基于少快拍条件均匀圆阵波束域MVDR方法

Research on beam domain MVDR algorithms of uniform circular array based on fewer snapshot conditions

针对在低信噪比条件下,均匀圆阵MVDR性能退化严重的问题,以及波束形成阵元数接近波束数时少快拍波束形成鲁棒性差的问题,提出均匀圆阵波束域MVDR算法:1)通过波束域MVDR提高波束形成的目标分辨率;2)采用对角加载技术提高波束域MVDR波束形成的鲁棒性,实现了在少快拍条件下强鲁棒性的均匀圆阵BMVDR,并通过仿真实验验证。

In view of the serious degradation of uniform circular array MVDR performance under low signal-to-noise ratio(SNR)and the poor robustness of fast-shot beamforming when the number of beamforming elements approaches the number of beams,a uniform circular array beamforming MVDR algorithm is proposed.First,beamforming resolution is improved through beamforming MVDR;second,diagonal loading technology is adopted to improve beamforming resolution.The robustness of MVDR beamforming in high beam domain is achieved,and the uniform circular array BMVDR with strong robustness under the condition of fewer snapshots is realized,which is verified by simulation experiments.