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

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.