PD雷达导引头海杂波回波信号模拟

Simulation of Sea Clutter Echo Signal in PD Radar Seeker

在雷达系统模拟中所面临的一个重要背景环境是杂波,杂波的散射特性直接影响到雷达对目标的检测和跟踪性能。对弹载导引头而言,海杂波成为影响其性能的一个重要因素。文章结合反舰导弹的不同作战背景,对PD雷达体制下的海杂波进行了建模仿真,仿真实现了海杂波的后向散射系数、幅度统计特性、功率谱特性,以及在雷达发射信号为线性调频信号时的海杂波回波信号。仿真结果与理论相符,海杂波的模型可用于目标的检测和跟踪。

Clutter is an important background environment in the simulation of radar system.The scat-tering characteristic of clutter directly affect the detection and tracking performance of radar.Sea clutter plays an important part in the performance of seeker.According to various warfare backgrounds of ASM（an-ti-ship missile）,this paper sets up a sea clutter model and makes simulation for PD seeker.The backscatter-ing,amplitude characteristic,power density characteristic are simulated,as well as the echo signal of sea clutter when the transmitted signal is linear frequency modulated（LFM）signal.The simulation result is coin-cident with the theory.The model of sea clutter can be used in target detection and tracking.