利用Radon-Wigner变换的空间目标测距算法  

Range Measuring Algorithm for Space Target Based on Radon-Wigner Transform

作　　者：许建忠[1] 李利[2] 陈成瑶[3] 孙业岐[1] 段平光[1] 

机构地区：[1]河北大学物理科学与技术学院,河北保定071002 [2]北华航天工业学院,河北廊坊065000 [3]北京航空航天大学计算机学院,北京100191

出　　处：《光电工程》2012年第4期44-48,共5页Opto-Electronic Engineering

基　　金：河北省自然科学基金资助项目(F2011409008)

摘　　要：针对雷达对运动目标的测距问题,根据运动目标在宽带线性调频脉冲照射下的回波特点,提出了一种采用Radon-Wigner变换进行运动目标测距的方法。该方法首先研究了运动目标多散射点回波信号经Stretch处理的数学模型,然后针对处理后回波的叠加性和线性调频特点,利用Radon-Wigner变换的时频聚集特性,对其进行调频参数的估计,进而实现匀速运动目标的测距。仿真结果表明,该方法对运动目标的测距是有效的。According to the question of Radar ranging for the moving target,using the echo characteristic of wideband linear frequency modulated pulse,a method of range measuring for moving target based on Radon-Wigner transform is proposed.In this method,firstly,a mathematic model of stretch processing for moving target scatter echo is studied.Secondly,according to the superposition of echo and the characteristic of LFM after stretch processing,the parameter of frequency modulation is estimated with the excellent time-frequency concentration performance of Radon-Wigner transform.Finally,the range of moving target is measured.The results show that this method is effective for range measuring of moving target.

关 键 词：线性调频 STRETCH处理 RADON-WIGNER变换 测距 

分 类 号：TN957.151[电子电信—信号与信息处理]