摘要
PD(脉冲多普勒)雷达在现代雷达中起着举足轻重的作用,对杂波的正确建模仿真与理解,关系到雷达设计师在雷达系统设计时对整个系统的准确把握。文章针对机载预警雷达的地杂波处理问题,首先介绍了地杂波模拟原理,然后分别介绍了后向散射系数模型以及对数正态分布序列的产生方法,给出了基于起伏RCS(雷达散射截面积)的杂波功率谱模拟方法。最后给出一种分区CFAR(恒虚警检测)方法,并通过模拟杂波数据和实测数据分别做仿真,通过与传统CFAR方法对比,验证了分区检测方法的有效性。
The pulse Doppler(PD)radar plays an important role in development of modern radar.Correct modeling simulation and understanding for clutter is related to accurate mastering whole system when radar designers design radar system.Aiming at ground clutter processing issues of airborne early warning radar,the simulation principle of ground clutter is introduced firstly,and then backscattering coefficient model and method of producing logarithmic normal distribution sequence is presented respectively;a method of simulating clutter power spectrum based on rolling RCS is proposed;finally,a kind of partition CFAR(constant false alarm detection)method is given,and simulation on simulated clutter data and real measured data are carried out respectively,and its effectiveness is verified by comparing with traditional CFAR method.
作者
李小萍
Li Xiaoping(No.38 Research Institute of CETC,Hefei,230088)
出处
《火控雷达技术》
2017年第4期20-23,共4页
Fire Control Radar Technology
