一种卫星导航接收机固定多波束抗干扰方法

自适应波束形成抗干扰性能受先验信息、通道幅相误差等因素影响较大,在工程应用中实现复杂,鲁棒性较差。针对这一问题,提出了一种卫星导航接收机固定多波束抗干扰方法,该方法将信号空间分为多个子空间,通过最优分配策略选取多个子空间分别实现固定波束指向,并相应地在每个波束后配置独立的卫星捕获跟踪通道组,然后依据最高信噪比准则在所有的子空间中优选卫星进行定位解算。该方法无需先验信息辅助,在抑制干扰信号的同时对卫星信号形成接收增益,在存在工程误差的实际条件下可达到与典型自适应波束形成算法相当的抗干扰性能,且具有鲁棒性强、更易工程实现等优点。最后,通过计算机仿真验证了该方法的有效性。

The Invention Relates to a Fixed Multi-beam Forming Anti-jamming Method for Satellite Navigation Receiver

The anti-jamming performance of adaptive beamforming is strongly affected by prior information, amplitude and phase error of channel and so on. Thus, the implementation of engineering application is complex and the robustness is poor. In order to solve this problem, this paper proposes a fixed multi-beam forming anti-jamming method for satellite navigation receiver. This method divides the signal space into multiple subspaces, which are selected by optimal allocation strategy to achieve fixed beam pointing. And correspondingly, an independent satellite acquisition tracking channel group is configured after each beam, and then the satellites are selected and located in all spatial diversity according to the highest signal to noise ratio criterion. The method does not require prior information assistance, and forms an acceptance gain for the satellite signal while suppressing the interference signal, and has the advantages of strong robustness and easier engineering implementation. Finally, the effectiveness of the method is verified by computer simulation.