球载雷达地杂波建模与仿真分析

Modeling and Simulation Analysis of Balloon-borne Radar Ground Clutter

球载雷达由于平台的升高,易受到风的影响,其运动特性具有时变性,面临的强地杂波特性也会发生变化,地杂波不再是固定杂波,为了更好地处理地杂波,本文对球载雷达的地杂波进行建模。首先建立了球载雷达的空间模型和数学模型,重点分析了球载雷达平台受到风的影响对地杂波统计特性的影响,在此基础上考虑了地杂波的各种影响因素,利用零记忆非线性变换法产生随机的序列体现杂波统计特性。最后给出了球载雷达地杂波距离多普勒二维仿真并对仿真结果进行分析,进一步揭示了球载雷达地杂波特性,为下一步探讨球载雷达地杂波抑制方法提供了支撑。

The balloon-borne radar is susceptible to wind due to the rise of the platform,so its motion characteristics are time-varying and the characteristics of strong ground clutter it faces will also change.The ground clutter is no longer a fixed clutter.For better dealing with ground clutter,this paper models the ground clutter of the balloon-borne radar.Firstly,the space model and mathematical model of the balloon-borne radar are established.The influence of the wind on the statistical characteristics of the balloon-borne radar platform is analyzed.On this basis,various influencing factors of ground clutter are taken into consideration and the ZMNL method is used to generate random sequences to represent clutter statistical characteristics.Finally,the range and Doppler two-dimensional simulation of the balloon-borne radar ground clutter is given and the simulation results are analyzed.The clutter characteristics of the balloon-borne radar are further revealed,which provides a support to investigate the ground clutter suppression method for the balloon-borne radar.