Radon-Wigner变换法加速目标多普勒回波提取  

Doppler Echo Extraction of Accelerated Target Based on Radon-Wigner Transform

作　　者：李文臣[1,2] 王雪松[1] 王国玉[1] 

机构地区：[1]国防科技大学电子科学与工程学院 [2]中国人民解放军63880部队

出　　处：《无线电工程》2009年第7期11-13,共3页Radio Engineering

基　　金：国家自然科学基金项目(60875019)

摘　　要：目标加速运动会使雷达回波多普勒频谱展宽,导致傅里叶频谱分析方法信噪比下降、分辨率降低。为此给出了基于Radon-Wigner变换(RWT)的加速目标脉冲多普勒回波提取方法。论述了加速机动目标的脉冲多普勒雷达回波模型和傅里叶变换频谱分析方法,给出了基于RWT的雷达多普勒二次相位信号提取方法。对傅里叶变换和RWT方法进行了仿真比较,表明RWT具有较强的输出信噪比和速度加速度分辨能力。The target＇s accelerated motion causes the spectrum broadening of Doppler echo,which results in the reduction of signal-to-noise ratio and resolution for the Fourier spectral analysis method.The Doppler echo extraction of accelerated target based on Radon-Wigner transform（RWT） is given in this paper.Firstly,the pulse Doppler radar echo model of accelerated target and the Fourier spectral analysis method are given.Secondly,the Doppler quadratic phase extraction of radar echo signal based on RWT is given.Finally,the simulation comparisons of Fourier transformation and RWT method are offered,which indicate that RWT has the strong output signal-to-noise ratio and resolution of velocity and acceleration.

关 键 词：加速目标 脉冲多普勒雷达 RADON-WIGNER变换 速度加速度分辨 线性调频信号 

分 类 号：TN957[电子电信—信号与信息处理]