针对分布式小卫星SAR系统抗干扰时编队构形的限制,研究了优化阵列在超稀疏构形抗干扰中的应用.使用优化阵列确定编队构形中小卫星的相对位置,可以提高方向分辨率,减小达到一定波束形成性能所需要的孔径长度,减小所需小卫星数目,降低硬件开销.分析了卫星位置偏差对抗干扰性能的影响.仿真证明,采用优化阵列构形可以使分布式小卫星SAR系统获得良好抗干扰性能.

Based on the limitation of formation of distributed microsatellite SAR system, this paper studies application of coarray in anti-jamming technique for ultra-sparse arrays. Using positions of small satellites provided by coarray, resolution in direction can be improved, number of satellites required to attain expected beamforming performance as well as cost of hardware can be reduced. Effect of satellite position deviation on anti-jamming performance is analyzed. Simulation results show good anti-jamming performance of distributed microsatellite SAR system with coarray.

TN959

“十五”国防预研基金资助项目（41307020203）