基于波束赋形的鲁棒Capon波束形成
Robust Capon Beamforming via Shaping Beam Pattern
摘要:
Capon波束形成的两个主要缺点是旁瓣电平高和波达方向(DOA)估计灵敏度高。针对这些问题,本文综述了一系列基于波束赋形的稳健Capon波束形成方法,包括稀疏Capon波束形成、加权稀疏Capon波束形成、基于混合范数的Capon波束形成、基于总变差最小化的Capon波束形成、基于主副瓣功率比最大化的Capon波束形成。通过这些附加的结构诱导约束,抑制了旁瓣,提高了对DOA失配的鲁棒性。仿真结果表明,所得到的波束形成器优于标准Capon波束形成器。
英文摘要:
High sidelobe level and direction of arrival (DOA) estimation sensitivity are two major disadvantages of the Capon beamforming. To deal with these problems, this paper gives an overview of a series of robust Capon beamforming methods via shaping beam pattern, including sparse Capon beamforming, weighted sparse Capon beamforming, mixed norm based Capon beamforming, total variation minimization based Capon beamforming, mainlobe-to-sidelobe power ratio maximization based Capon beamforming. With these additional structure-inducing constraints, the sidelobe is suppressed, and the robustness against DOA mismatch is improved too. Simulations show that the obtained beamformers outperform the standard Capon beamformer.
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