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提出了一种利用非圆特征恢复思想的鲁棒波束形成方法。该方法在特征空间投影技术的基础上,进一步利用波束形成器输出的非圆特征参数构造代价函数,通过角度搜索使代价函数最大化来修正主瓣中心指向,在保证鲁棒性的同时尽可能提升波束形成器的输出性能。同时,该方法不需要设置用户参数,且适用于任意阶非圆信号,对于旁瓣干扰信号的非圆特性不敏感,具有广泛的应用背景。最后分别针对二阶非圆信号情形和高阶非圆信号情形进行了仿真,仿真结果验证了该方法的有效性和优越性。
A robust beamforming method based on non-circular feature restoration is proposed. Based on the feature space projection technique, the method further constructs the cost function by using the non-circular feature parameters output by the beamformer, and modifies the main-lobe center point by maximizing the cost function through angle search. As far as possible, while ensuring the robustness, Boost beamformer output performance. At the same time, this method does not need to set user parameters, and it is suitable for non-circular signals of arbitrary order. It is insensitive to non-circular characteristics of sidelobe interfering signals and has a wide range of applications. Finally, the second-order non-circular signal case and the high-order non-circular signal case are simulated. The simulation results verify the effectiveness and superiority of the method.