摘要
宽带雷达利用脉冲串测速时,高速运动目标在脉冲串内通常移动超过多个距离分辨单元,无法直接积累获取速度信息,同时在宽带雷达中,即使目标速度恒定不变,目标的多普勒频率也会随着雷达信号频率的变化而变化,此时利用多普勒频率信息估计目标的速度必然会受到影响。针对宽带脉冲多普勒雷达测速的特点,提出了一种基于Keystone变换的测速方法,能有效解决目标越距离单元徙动和多普勒谱展宽,仿真证明该测速方法能达到很高的测速精度,有一定的应用价值。
In wideband radar,high-velocity targets usually move through several range resolution cells,which is troublesome to estimate target＇s velocity.Also,even the speed of target is invariable,Doppler frequency of target will still change with the variation of radar signal frequency.An accurate velocity measurement method for wideband radar based on Keystone transform is proposed.The method can deal with the range migration and the Doppler spectra broadening the target.The simulation shows that the proposed velocity measurement method can achieve very accurate velocity estimation and is very practical in wideband radar.
出处
《雷达科学与技术》
2010年第6期538-542,共5页
Radar Science and Technology
关键词
宽带雷达
KEYSTONE变换
高速目标
测速
wideband radar
Keystone transform
high-velocity target
velocity measurement
