摘要
地杂波是影响机载雷达性能的主要因素,机载下视雷达的地杂波模拟大多是采用距离-多普勒网格划分和统计特性分析的方法,为研究特定真实场景下的地杂波,利用数字高程模型(DEM)数据,对机载雷达系统进行地杂波建模,对各小面单元进行遮挡判断,并利用PD雷达的回波信号模型,计算出各DEM单元的雷达回波,最终得到总的雷达地杂波,实现整个地面的地杂波时域幅度回波的计算,同时采用了一系列简化方法,减少了仿真时间,算法速度有了很大的提升。
The ground clutter is the main factor of affecting the performance of airborne radar.The simulation of the ground clutter of airborne radar in look-down mode mostly adopts distance-Doppler grid partition and statistical characteristics analysis.To research the ground clutter in particular and real scenes,the ground clutter modeling and simulation of airborne radar is discussed in this paper.Based on DEM data,and the shadow effect for each cell is also judged.Then the ground clutter returned from this specific scene for airborne pulse-Doppler radar can be simulated.The time domain waveform calculation of the ground clutter is realized.By using some different simplified methods,the computation time has been reduced,and the speed of simulation has been improved.
出处
《雷达科学与技术》
北大核心
2015年第6期646-649,共4页
Radar Science and Technology
关键词
数字高程模型
机载雷达
地杂波仿真
遮挡判断
digital elevation model（DEM）
airborne radar
land clutter simulation
shadow judgement
