Journal of Systems Engineering and Electronics ›› 2009, Vol. 31 ›› Issue (1): 74-77.

• 传感器与信号处理 • 上一篇    下一篇

基于重排小波-Radon变换的LFM雷达信号参数估计

李利, 司锡才, 柴娟芳, 张雯雯   

  1. 哈尔滨工程大学信息与通信工程学院, 黑龙江, 哈尔滨, 150001
  • 收稿日期:2007-10-21 修回日期:2008-02-20 出版日期:2009-01-20 发布日期:2010-01-03
  • 作者简介:李利(1982- ),男,博士研究生,主要研究方向为宽带信号检测、识别和处理.E-mail:lili804@hrbeu.edu.cn

Parameters estimation for LFM radar signal based on reassigned wavelet-Radon transform

LI Li, SI Xi-cai, CHAI Juan-fang, ZHANG Wen-wen   

  1. School of Information and Communication Engineering, Harbin Engineering Univ., Harbin 150001, China
  • Received:2007-10-21 Revised:2008-02-20 Online:2009-01-20 Published:2010-01-03

摘要: 小波变换是一种兼顾时频分辨率的线性变换,对多分量情况不会引入交叉项。针对此问题,提出基于重排小波-Radon变换的多分量线性调频信号的参数估计法。该方法先将小波尺度图转为时频分布图,为提高聚集性引入了时频重排,再将重排图进行Radon变换以进行参数估计。对单分量和双分量的情况进行了仿真,结果表明,该方法有效提高了时频分布图的聚集性,大大节省了后续Radon变换的时间,同时也抑制了噪声干扰,辨识效果明显提高。

Abstract: The wavelet transform is a linear transform which has the time-frequency resolution,and it has no cross-terms to multi-component LFM signals.This paper proposes a parameter estimating method for multi-component LFM signals based on wavelet reassignment and Radon transform.This method firstly transforms the wavelet scale into the time-frequency distribution.For improving aggregation,the reassignment is involved,and then a Radon transform is done for parameter estimation.The results of simulations for single and double LFM signals show that this method is effective to improve the aggregation of time-frequency distribution.It saves time mostly for the following Radon transform and inhibits the noise at the same time.The effectiveness is improved obviously.

中图分类号: