一种高精度快速频率测量方法  

A High Accurate and Speediness Measurement of Frequency

作　　者：周增建[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,陕西西安710071

出　　处：《电子质量》2009年第5期19-21,共3页Electronics Quality

基　　金：国家自然科学基金项目(10703004)

摘　　要：文中研究了一种基于多重自相关的Hilbert变换频率估计算法,利用正弦信号的特性,进行多重自相关运算,有效的提高信噪比,结合Hilbert变换对信号的频率进行估计,从而提高了频率测量的准确度,实验结果表明了该方法具有很好的抗噪能力,能有效的对信号的频率进行估计,比传统的直接Hilbert估计算法精度要高2-3个数量级。A new method of frequency measurement by Hilbert transtorm after several times autocorretation is introduced in this paper.By the trait of sinusoidal signal we do some times autocorretaion whick can improve Signal-to-Noise effectiyely.And then use the method of Hilbert transform,the veracity of signal frequency measurement can be improved.Experiment results indicate this method can estimate signal＇s frequency effectively.It improves 2-3 number degree compared to the traditional zeros examination.

关 键 词：多重自相关 HILBERT变换 高精度 

分 类 号：TM935.1[电气工程—电力电子与电力传动]