摘要
利用相干视频仿真原理,对天基雷达(SBR)的地杂波进行仿真,在此基础上对杂波信号进行了谱估计,并研究基于不同谱估计方法下的杂波谱,包括经典谱估计和现代谱估计的各种方法;然后分析各种谱估计方法下的杂波谱,找出一种比较精确的谱估计方法,并研究了天基雷达杂波谱的独特特性,分析不同因素对杂波谱的影响,包括观测角、平台运动、天线方向图以及卫星姿态等。给出了仿真结果,提高了谱估计的精确性。
To solve the problem of simulation for ground clutter received by space-based radar（SBR）, a method based on the principle of the cohered video is illustrated. First of all, the ground clutter signal is estimated. Then, the clutter spectrum based on different methods of spectral estimation is investigated which includes all kinds of methods for classical spectral estimation and modern spectral estimation. Also, the clutter spectrum based on all kinds of methods is analyzed. Therefore, a more precise method is proposed. Third, the particular characteristics of SBR clutter spectrum are studied. And then the effects of different factors on the clutter spectrum are analyzed, which include antenna angle of view, earth rotation, orbital moving, antenna pattern and satellite attitude. The simulation result is also given. The accuracy of spectral estimation is improved.
出处
《雷达科学与技术》
2007年第5期324-330,共7页
Radar Science and Technology
基金
军口863项目(No.2006AA701103)
关键词
天基雷达
视频仿真
谱估计
杂波谱
杂波特性
space-based radar（SBR）
cohered video simulation
spectral estimation
clutter spectrum
clutter characteristic
