首页 | 本学科首页   官方微博 | 高级检索  
     

基于复解析带通滤波器的复调制细化谱分析的算法研究
引用本文:谢明,丁康.基于复解析带通滤波器的复调制细化谱分析的算法研究[J].振动工程学报,2002,15(4):479-483.
作者姓名:谢明  丁康
作者单位:1. 重庆大学机械工程学院,重庆,400044
2. 汕头大学机械电子工程系,汕头,515063
基金项目:国家自然科学基金资助项目 (编号 :5 0 0 75 0 4 9),国家教育部高等学校骨干教师资助计划项目 (编号 :教技司 [2 0 0 0 ]6 5 号 ),振动、冲击、噪声国家重点实验室开发基金 (编号 :VSN- 2 0 0 1- 0 4 )
摘    要:在采用复解析带滤波器宽度为fs/2D、隔D点选抽一点、移频和作N点谱分析的方法进行细化谱分析的原理基础上,研究了基于复解析带通滤波器复调制细化谱分析的算法。讨论了算法的核心部分-复解析带通滤波器的构造,滤波器外扩的原理,一级选抽及二级选抽滤波器的设计。仿真研究表明,采用一级FIR数字滤波器,当半阶数为500时,最大细化倍数可达150,仍能保证幅值分析误差在1%以内,采用二级FIR滤波器最大细化倍数可达2000倍以上,运算速度也有较大幅度的提高。

关 键 词:复解析带通滤波器  信号处理  频谱  解析信号
修稿时间:2001年4月16日

Algorithm of Multiple Modulation Zoom Spectrum Analysis Based on Complex Analytic Band-Pass Filter
Xie Ming.Algorithm of Multiple Modulation Zoom Spectrum Analysis Based on Complex Analytic Band-Pass Filter[J].Journal of Vibration Engineering,2002,15(4):479-483.
Authors:Xie Ming
Abstract:On the basis of the principle of zoom spectrum analysis by adopting complex analytic band pass filter with bandwidth f s/2D , and the sub sampling rate D , shifting frequency, and making spectrum by FFT with N dots, this paper investigated the algorithm of multiple modulation zoom spectrum analysis based on complex analytic band filter. And then discusses apmly the core of the algorithm:construction of complex analytic band pass filter, principle of filter outer spread, and design of the filter adopting one grade FIR digital filter or two grade FIR. It is shown in simulation that the maximum zoom time is high to 150, and amplitude error is less than 1%, when digital filter with half order of 500. If two grade FIR digital filter is adopted, the maximum zoom time is more than 2000, and arithmetic speed is improved greatly.
Keywords:signal processing  spectrum  analytic signal  zoom
本文献已被 CNKI 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号