一种基于DSP的小波包变换对瞬时频率的测量  

Measurement of Frequency by Wavelet Packet Transform Base on DSP

作　　者：周增建[1] 范文晶[1] 王海[1] 

机构地区：[1]西安电子科技大学测控技术与仪器系

出　　处：《电子质量》2009年第9期1-3,9,共4页Electronics Quality

摘　　要：文章研究了一种基于小波包变换对信号的瞬时频率测量方法,利用小波包变换的特性,把输入信号分解成各个单一频率分量信号,然后对分解后的信号做Hilbert变换,得到分解后信号的瞬时频率,最后综合得出输入信号的瞬时频率。文章给出了信号频率测量的硬件系统设计结构,和关键的电路原理图,同时给出了该方法对各种信号的实验结果,试验结果表明该方法在本文所设计的硬件系统上能够有效地测量单目标,及多目标信号的瞬时频率。A method of signal frequency measurement by wavelet packet transform is introduced in this paper. By the trait of wavelet packet transform, whfch can decompose signal into signals just contain one frequency, And then do Hilbert transform to every signal to obtain their frequency, so the input signal frequency can be obtained. We also provide hardware frame design- ment and critical electric schematic diagram, and give experimental results of this method to some signals. The experimental results indicate that this method can measure the instantaneous frequency of simple target or multiple targets in hardware system designed in this paper.

关 键 词：DSP 小波包变换 瞬时频率 

分 类 号：TM935.13[电气工程—电力电子与电力传动]