星载SAR地基侦察信号建模与仿真

Modeling and Simulation of Ground-based Reconnaissance Signal of Satellite-borne SAR

对星载合成孔径雷达(SAR)的侦察可以为合成孔径雷达电子战提供有力的支援。在地基侦收站跟踪侦察星载SAR的背景下,建立了星载SAR地基侦察信号的数学模型。该模型利用真实卫星的天线参数及轨道参数,充分考虑了脉内多普勒频率因素。在侦察场景模型基础上,计算了条带模式下方位向的天线增益,通过仿真分析了星载SAR地基侦察信号,为星载SAR参数估计等研究奠定了基础。

The reconnaissance to satellite-borne synthetic aperture radar（SAR） can support electronic warfare of SAR strongly.This paper establishes a mathematical model of ground-based reconnaissance signal of satellite-borne SAR under the background that the ground-based reconnaissance and receiving station tracks and reconnoiters the satellite-borne SAR.The model uses the antenna and orbit parameters of real satellites,concludes Doppler frequency of intra-pulse adequately.Based on the reconnaissance scene model,this paper calculates the antenna gain in the azimuth,analyzes the ground-based reconnaissance signal of satellite-borne SAR through the simulation,which lays a foundation for the studies of parameters estimation of satellite-borne SAR.