CAJ | 학술논문

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.
분포식성재뢰체돌파료단성뢰체수공솔공경적적한제,구유경원적탐측거리;돌파료단성뢰체수천선기선장도적한제,구유경착적파속관도,단시회산생교다적공경간섭책판.문중연구료일충분포식성재뢰체적책판억제방법,해방법채용유전산법래학정초희소적비균균분포식성재뢰체진렬적위치시량,이용개체적실치편마제고료유전산법적계산효솔.＃재급정위성진렬기선장도화위성간최소간거약속적조건하,통과방진실험험증료해방법억제책판적유효성.위성개수월다,책판억제효과월호.수착소위성기술적발전이급소위성성본적강저,문중기우비균균분포진렬적책판억제방법대소위성적분포설계구유일정적삼고개치.
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 suppresses grating lobes.It improves effectively the GA's performance through real-valued coding of chromosome.When the baseline of satellites array and the minimum spacing are given,the effectiveness of this grating lobes suppression method was validated by simulated results.As the development of the small satellite technology,the cost of small satellite is reduced,and this study will have certain reference value for the design of distribution of small satellite.