最差性能最优的稳健宽带Capon波束形成算法

针对常规Capon波束形成易受期望信号导向矢量失配的影响，提出了一种基于广义特征值分解的稳健宽带Capon波束形成算法。算法利用空间响应偏差约束实现宽带频率不变波束形成，同时增加期望信号导向矢量的不确定集约束，改善了算法对导向矢量偏差的稳健性，推导出自适应权矢量的两类近似闭式解。仿真结果表明，与现有的稳健宽带波束形成算法相比，算法在改善波束频响一致性的同时，提高了阵列输出信干噪比，对期望信号导向矢量的误差具有很好的稳健性。

Robust Broadband Capon Beamforming Algorithm Based on Worst Case Performance Optimization

Since standard Capon beamformer is susceptible to the steering vector mismatch of the desired signal, a novel robust broadband Capon beamforming algorithm based on generalized eigenvalue decomposition is proposed. The algorithm incorporates the spatial response variation (SRV) constraint into Capon beamformer to design the frequency invariant beampattern and improve the robustness against the steering vector mismatch by employing steering vector uncertainty set constraint, and two approximate closed form solutions to the adaptive weight vector are derived by using the generalized eigenvalue decomposition. Simulation results show that the proposed beamformer increases the output signal to interference plus noise ratio (SINR) and has good robustness against the steering vector error of the desired signal while it improves the frequency response consistency compared with current robust broadband beamforming algorithms.