摘要
针对传统的多分量LFM信号检测与参数估计中存在的精度不高和交叉项问题,将小波重排与Hough变换结合起来,首先对信号进行小波变换,克服交叉项干扰,再经过时频重排保证精度,以重排后的时频分布作为图像,利用Hough变换通过查表的方式,实现对各分量的依次截取和参数估计。仿真实验表明,该方法能够有效地提取多分量LFM信号中各分量的特征参数。
Aiming on the problem of low precision and crossterm in the conventional method of Multi-component LFM Signal detection and parameter estimation.A time-frequency associated analyzed method based on wavelet transform and time-frequency reassignment and Hough transform is proposed.Overcome the interferences of crossterm by wavelet transform,guarantee the accuracy by time-frequency reassignment,use the distribution of time-frequency after reassignment as the image, then achieves the interception of component a...
出处
《现代防御技术》
北大核心
2008年第3期122-126,共5页
Modern Defence Technology
基金
国防预研基金资助项目(J1442050204JB4901)
关键词
多分量线性调频信号
小波变换
时频重排
HOUGH变换
multi-component LFM signal
wavelet transform
time-frequency reassignment
Hough transform
