摘要
线性正则变换是一种有用的信号处理工具,它是Fourier变换、分数阶Fourier变换更为广义的形式.Wigner分布和模糊函数是2种经典的时频分布描述方法.利用Wigner分布和模糊函数的性质并借助于线性正则变换矩阵分解形式讨论和描述了线性正则变换与时频分布的关系,给出了几何图形解释,为进一步研究线性正则变换在时频信号分析中的应用奠定了理论基础.
The linear canonical transtrorm is a useful tool for signal processing. It is the generalization of the Fourier transform and the fractional Fourier transform. The Wigner distribution function and the ambiguity function are both well - known time - frequency representations. Originally using the properties of Wigner distribution function and the ambiguity function, as well as with the help of the decomposition of the linear canonical transform matrix, it is discribed the relations between the time -frequency distributions and the linear canonical transform and gave geometric interpretation for it. All of these work will help to research the applications of the linear canonical transform on the time -frequency signal analysis.
出处
《云南大学学报(自然科学版)》
CAS
CSCD
北大核心
2009年第1期27-31,共5页
Journal of Yunnan University(Natural Sciences Edition)
基金
国家自然科学基金资助项目(60603009)
关键词
线性正则变换
时频分布
WIGNER分布
模糊函数
linear canonical transform
time - frequency distributions
Wigner distribution
the ambiguity function
作者简介
向强(1973-),男,四川人,博士生.主要从事时频信号分析与测试理论方面的研究.
通讯作者:秦开宇(1967-),男,四川人,教授,博士生导师,主要从事复杂电子系统仿真、测试、验证与评估技术(微波测量仪器、导航与宽带无线通信测试技术),空间复杂电子系统(飞行器测控通信与有效载荷技术、精确制导与控制技术)方面的研究,E-mail:kyqin@uestc.edu.cn.