摘要
针对分布式小卫星SAR系统抗干扰时面临的超稀疏问题,提出了一种空/频域抗干扰方法。该方法利用目标和干扰源的空间独立性,通过对编队构形优化,结合频率分集,实现了抗干扰功能,且方向分辨率提高1倍以上,栅瓣数目大为减少。仿真证明,该种方法可以实现分布式小卫星SAR系统的抗干扰,对构形和系统设计有重要意义。
Ultra sparse structure limits anti-jamming performance of distributed micro-satellite SAR system. This paper details an anti-jamming technique based on space/frequency info. This technique takes advantage of spatial independence of target and jammer, uses coarray with frequency diversity method, increases the spatial resolution more than one time, and decreases the number of grating lobes greatly. Simulation testifies benefits of this technique to formation and system design.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2006年第3期469-473,共5页
Journal of Astronautics
基金
'十五'国防预研基金资助(41307020203)
关键词
分布式
SAR
抗干扰
优化阵列
频率分集
Distributed system
SAR
Anti-jamming
Coarray
Frequency diversity
