基于拉伸处理的宽带宽角波束形成技术

为了抑制宽带干扰信号,提出了一种宽带大扫描角接收波束形成新方法.该方法对接收线性调频信号做拉伸处理和窄带滤波,然后把宽带相位补偿权和窄带权相结合形成最优权.最优权在目标方向形成主瓣的同时在干扰方向形成宽、深的凹口,从而提高了输出信干比.经拉伸处理和窄带滤波的目标信号带宽大大降低,数据采样率也大大降低,因此计算量减小,利于工程实现.仿真结果表明,该算法可有效抑制宽带干扰信号,并具有较好的稳健性.

Beamforming Techniques of Wideband and Large Scan Angle Based on Stretch Processing

In order to restrain wideband interference signal effectively, a new receiving beamforming method of wideband and large scan angle was presented. The received linear frequency modulated signal was carried through stretch processing and narrowband filtering, and then optimal weight was produced by combining wideband phase with narrowband weight, such that the mainlobe was formed in the target direction while a wide and deep notch was formed in the direction of the interference, and the output signal interference ratio was increased. The bandwidth of target signal after stretch processing and narrowband filtering, the data sample ratio and computing burden are reduced greatly and the method is easy for engineering implementation. Simulation results demonstrate that the method can restrain interference effectively and robustly.