非均匀分布式星载雷达栅瓣抑制技术研究

分布式星载雷达突破了单星雷达受功率孔径积的限制,具有更远的探测距离;突破了单星雷达受天线基线长度的限制,具有更窄的波束宽度,但是会产生较多的孔径干涉栅瓣.文中研究了一种分布式星载雷达的栅瓣抑制方法,该方法采用遗传算法来确定超稀疏的非均匀分布式星载雷达阵列的位置矢量,利用个体的实值编码提高了遗传算法的计算效率.＃在给定卫星阵列基线长度和卫星间最小间距约束的条件下,通过仿真实验验证了该方法抑制栅瓣的有效性.卫星个数越多,栅瓣抑制效果越好.随着小卫星技术的发展以及小卫星成本的降低,文中基于非均匀分布阵列的栅瓣抑制方法对小卫星的分布设计具有一定的参考价值.

Grating Lobes Suppression for Non-uniform Distributed Space-based Radar

Compared to single-satellite radar,a great power-aperture product with longer detection range can be achieved by distributed space-based radars.A long baseline with narrower beamwidth can also be provided by distributed space-based radars at the cost of appearing grating lobes.A method of grating lobe suppression for distributed space-based radars is introduced.This method uses genetic algorithm(GA) to determine the satellite position vector of the big sparse distributed space-based radar array,then suppres...