基于改进Choi-Williams分布的多分量信号频率识别方法  

An Approach of Frequency Recognition for Multicomponent Signals Based on Improved Choi-Williams Distribution

作　　者：甘泉[1] 胡来招[2] 

机构地区：[1]西南交通大学电磁所,四川成都610031 [2]中国电子科技集团第29研究所电子对抗重点实验室,四川成都610036

出　　处：《信号处理》2006年第6期895-898,共4页Journal of Signal Processing

摘　　要：通过相关域内对短时信号模糊函数的分析,针对短时信号对Choi-Williams分布(CWD)的核函数进行了改进,提出对加窗信号运用改进后的CWD提取信号时频信息的方法。仿真实验表明陔方法对多分量信号具有较强的交叉项抑制能力,在提高了信噪比特性的同时,也减少了计算量。Based on the analysis of short-time signal＇ s ambiguity function in the time-lag domain, the kernel function of Choi- Williams Distribution（CWD） was improved for short-time signals. An approach of extracting the time-frequency information of signals by improved CWD was proposed. It was showed in the results of simulated experiments that the approach has powerful ability of cross term suppression for multicomponent signals and better performance of calculation and SNR.

关 键 词：Choi-Williams分布 瞬时频率 核函数 识别 

分 类 号：TN911.7[电子电信—通信与信息系统]