基于时频分析的LFM信号检测与参数估计  

Detection and Parameter Estimation of LFM Signal Based on Time-frequency Analysis

作　　者：邵智超 [1] 吴彦鸿 [2] 贾鑫 [2] 

机构地区：[1]装备指挥技术学院,研究生部,北京,101416 [2]装备指挥技术学院,测量控制系,北京,101416

出　　处：《装备指挥技术学院学报》2004年第2期71-75,共5页Journal of the Academy of Equipment Command & Technology

基　　金：国家高技术发展计划项目

摘　　要：基于Radon-Wigner变换、分数阶Fourier变换与时频分布的关系,利用其对线性调频(linearity frqueney modulation,LFM)信号良好的时频聚集性,通过计算Radon Wigner变换或分数阶Fourier变换,对线性调频信号LFM信号进行检测和参数估计.理论分析和计算机仿真证明:2种方法对于LFM信号的分析好于Wigner Ville变换等常用的时频变换.Based on the relationship between the Radon-Wigner transform and fractional Fourier transform and the time frequency distribution, using the property that Radon-Wigner transform has better performance in time and frequency domain, detection and parameter estimation of LFM signal have been done by Radon-Wigner transform or fractional Fourier transform. The theoretical analysis and simulation prove that two techniques are better than generic time-frequency transform, such as Wigner-Ville transform.

关 键 词：时频分析 LFM信号检测 参数估计 WIGNER-VILLE分布 RADON-WIGNER变换 分数阶 

分 类 号：TN911.23[电子电信—通信与信息系统]