天线主瓣大地照射圆内的多普勒谱分布

Doppler Spectrum from the Ground Circle Radiated by Antenna Mainlobe

安装在高速运动载体上的雷达高度表 ,其地面回波被一宽带多普勒信号所调制 ,从而使回波表现出新的特征 ,如何提取和充分利用这些特征对于雷达高度表的设计是非常重要的。首先介绍了大地回波宽带多普勒信号模型的建立 ,然后给出了在MATLAB下建立的仿真框架 ,最后对仿真结果进行了初步分析。

The radar altimeter mounted on high speed vehicle will demonstrate Doppler modulation characteristics, for the design of radar altimeter, it is important to make research on and take full advantage of these characteristics. This paper first introduces ground echo modeling for wide band Doppler, followed by a simulation scheme established under MATLAB environment. Finally, some simulation results are given and analyzed in a raw manner.\;