一种星载单双基地雷达系统混合工作新方式

A New Method of Jointly Applying Monostatic and Bistatic Space-Based Radar

单轨道星载双基地雷达系统的收发机卫星平台位于同一轨道上。该文分析了该系统模式下的杂波角度-归一化多普勒谱,发现目标最小可检测速度与天线扫描角度有很大关系,对某些角度进行检测时性能严重恶化。提出一种单双基地雷达混合工作方式并计算出模式转换的门限,该新方式可以节约雷达发射功率并减小卫星重量。采用空时二维信号处理方法进行仿真,结果表明该方式可以改善检测性能。

Single orbit bistaitc space based radar is composed of two radars in the same orbit. The paper analyzes the clutter angle-Doppler spectrum in this radar system, and finds out that minimum detectable velocity（MDV） is dependent on detecting angles and will degrade a lot in some angles, A new combined monostatic and bistatic radar mode with potential savings in size and weight of the solar array-battery system on-board each satellite is then introduced and angle threshold is calculated. Simulation results with Space-Time Adaptive Processing（STAP） also verify the improved detection performance .