摘要
由于雷达分辨单元内一般包括很多随机分布的散射体,他们的介电常数和几何特性都是随机变量;同时散射体或雷达的运动也将引起回波振幅和相位的变化,这些原因导致杂波的雷达散射截面积σο具有随机起伏的性质。在计算杂波功率谱时,用起伏RCS代替平均RCS,对机载PD雷达的地杂波功率谱进行了仿真研究,给出了一种基于起伏RCS的杂波功率谱计算的一般方法,模拟了杂波功率谱的起伏特性,通过比较仿真结果,可以清楚地看到RCS起伏的特性对功率谱的影响,表明方法对地杂波仿真的有效性。
Generally speaking, there are many randomly distributed scatters in every radar resolution cells, and their dielectric constant and geometric features are all random variables. Movement of radar and scatters will also arouse random change of radar echo amplitude and phase. All the random factors lead to the random fluctuant characteristics of radar cross section. In calculating the airborne PD radar ground clutter PSD, authenticity is improved via replacing average RCS by fluctuant RCS in this paper. A general simulation method is also presented. The simulation is carried out by using Matlab platform and the effect of fluctuant RCS can be easily seen from the results. This denotes the effectiveness of this method for simulating ground clutter.
出处
《计算机仿真》
CSCD
2008年第12期38-41,共4页
Computer Simulation
关键词
起伏
雷达散射截面积
地杂波
功率谱
Fluctuant
Radar cross section
Ground clutter
Power spectrum
