基于LabWindows/CVI的联合时频分析  

The Joint Time-Frequency Analysis Based on LabWindows/CVI

作　　者：李一哲[1] 刘艳艳[1] 索坤[1] LI Yi-zhe,LIU Yan-yan,SUO Kun（Electronics and Information Engineering College Lanzhou Jiaotong University,Lanzhou 730070,China）

机构地区：[1]兰州交通大学电子与信息工程学院,甘肃兰州730070

出　　处：《电脑知识与技术》2010年第5期3364-3365,共2页Computer Knowledge and Technology

摘　　要：在LabWindows/CVI平台的基础上,研究了利用联合时频分析（JTFA）方法来分析信号的能量分布情况。此方法利用了短时傅里叶变换（STFT）的基本原理,对一些非平稳信号进行分析,能很好地描述信号的频率如何随时间而变化。这种方法比单独利用时域或频域来分析信号具有一定的优越性。Based on the LabWindows/CVI platform,we have studied the energy distribution situation of the signal by the joint time-fre-quency ana1sis method.This method has used the short-time Fourier transform basic principle to analyze some non-steady signals,and the method can describe how the signal frequency changes along with the time well.This method has certain superiority compared to analyzing the signal by using the time domain or the frequency range singlely.

关 键 词：LABWINDOWS/CVI 联合时频分析 短时傅里叶变换 

分 类 号：TP393[自动化与计算机技术—计算机应用技术;自动化与计算机技术—计算机科学与技术]