摘要
对单散射点和多散射点转动目标产生的雷达回波进行建模,分析了转动散射点对雷达回波的调制,使用CLEAN算法思想分离多散射点的信号;使用不同的带有加速度和加加速度调制的信号对回波信号进行匹配傅里叶变换,通过搜索的方式提取出与目标信号匹配最好的加速度与加加速度值;使用最小二乘法估计目标的转动频率,进而提取出目标的其他转动参数,在存在多普勒混叠的情况下通过提取目标的加速度估计值实现了对多散射点的转动目标的参数估计。最后,通过仿真实验验证了方法的有效性。
The signal model of the target with single and multiple scattering points is established.And the modulation of the radar echoes from rotating scattering point is analyzed.The echo signal of multi-scattering points is separated by the“CLEAN”method.Use different Doppler modulated signal by acceleration and jerk to perform match Fourier transform for the echo signal.Then,the acceleration and jerk parameters are estimated by matching pursuit criterion.The least square method is utilized to estimate rotation frequency of the target and other rotation parameters of the target may be estimated afterwards.This method can work well when Doppler frequency aliasing exists.In the end,the simulation and experiment verify the effectiveness of the method.
作者
宋鑫华
叶春茂
杨健
SONG Xinhua;YE Chunmao;YANG Jian(Beijing Institute of Radio Measurement,Beijing 100854,China;Department of Electronic Engineering,Tsinghua University,Beijing 100084,China)
出处
《太赫兹科学与电子信息学报》
北大核心
2018年第6期1087-1092,共6页
Journal of Terahertz Science and Electronic Information Technology
基金
国家自然科学基金资助项目(61490693)
关键词
微动
参数估计
多普勒混叠
匹配傅里叶变换
micro-motion
parameters estimation
Doppler frequency aliasing
match Fourier transform
