一种新的分布式小卫星SAR系统抗干扰方法

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。

A New Anti-Jamming Method For Distributed Microsatellites SAR System

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 heamforming 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.