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.
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
