天空双基雷达回波空时二维建模与分析

天空双基地雷达作为一种新型预警雷达体制,具有探测范围大、抗干扰能力强等优点。本文首先建立了天空双基地雷达的几何模型,然后对目标回波、杂波及直达波进行建模,并分别分析了三者的距离特性与多普勒特性,最后对有无地球自转情况下多普勒频率与目标飞行速度角度的关系、空时二维杂波谱以及目标回波与直达波的空时二维谱进行了仿真。综合理论与仿真结果,表明所建模型是合理的,能为天空双基地雷达关键技术研究提供参考。

Modeling and analysis of echo for space-air based bistatic radar

Space-air based bistatic radar (SABBR), as one kind of new early warning radar, has many virtues such as big detecting area and strong anti-jamming ability. Firstly, the geometric model of SABBR is built. Then the models of target echo, clutter and through wave are built, their range and Doppler properties are analyzed respectively. Finally the relation between Doppler frequency and angle of target flying velocity, space-time clutter spectrum, space-time spectrum of target echo and through wave are simulated. The theory and simulation results show that the built models are reasonable and can provide reference for the study of SABBR key techniques.