基于改进小波脊提取算法的数字信号瞬时频率估计方法  

Improved method of instantaneous frequency estimation based on wavelet ridge

作　　者：汪赵华[1,2] 郭立[1] 李辉[2] 

机构地区：[1]中国科学技术大学电子科学与技术系,合肥230027 [2]合肥电子工程学院,合肥230037

出　　处：《中国科学院研究生院学报》2009年第4期466-473,共8页Journal of the Graduate School of the Chinese Academy of Sciences

基　　金：国家自然科学基金(60702015)资助

摘　　要：在深入分析小波脊原理的基础上,针对数字信号瞬时频率提取精度要求,利用小波脊提取数字信号的瞬时频率,并对方法的初始值设置、解析小波参数设置和估计精度设置等关键问题进行了分析并改进.实际信号实验表明,改进算法鲁棒性明显增强,实用价值较大.In order to meet the precision requirement of digital signal instantaneous frequency estimation, an improved algorithm is proposed based on deep analyses of the principle of wavelet ridge. The major improvements of the algorithm include the arrangements on initial values, analytical wavelet＇ s parameter and estimation precision of iterative process. Experimental signal results show that the improved algorithm is more robust and practical.

关 键 词：数字信号 瞬时频率 小波脊 

分 类 号：TN911.7[电子电信—通信与信息系统]