一种新的分布式小卫星SAR系统抗干扰方法

A New Anti-Jamming Method For Distributed Microsatellites SAR System

针对分布式小卫星SAR系统中抗干扰时面临的超稀疏问题,提出了一种基于周期性均匀采样和带宽划分的抗干扰方法,即在各小卫星上使用均匀子阵,对采样信号进行带宽划分,进而进行波束形成抑制干扰。该方法使得系统满足窄带要求,提高了自由度数目,发挥了分布式结构的优点。仿真实验对不同阵列结构下的抗干扰结果进行了比较,验证了该方法的良好性能。

For the problem of ultra sparse geometry faced by anti-jamming in distributed microsatellites SAR system, This paper proposes a method based on periodic nonuniform sampling and bandwidth division, which uses a full-filled subarray on each satellite, divides the bandwidth, uses beamforming technique to anti-jamming. It makes the system satisfies narrow band requirement, raises number of freedom, and can remove more jamming and more effectively, it can unites data on all microsatellites to process. Simulation shows anti-jamming performance of different array configuration, anti-jamming result of beamforming, which testifies good performance of the method.