基于LABVIEW的联合时频分析
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摘要
在LabVIEW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,对线性调频信号等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,进而能很好把信号区分开来.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 LabVIEW platform,we have studied the distribution situation of the signal energy by the joint time frequency analysis method.This method has used the short-time Fourier transformation basic principle,and analyzes some non-steady signals such as the linear frequency modulation signal,and the method can describe how the signal frequency changes along with the time well,then can distinguish the signal very easily.This method has certain superiority compared to analyzing the signal by using the time domain or the frequency range alone
Based on the LabVIEW platform,we have studied the distribution situation of the signal energy by the joint time frequency analysis method.This method has used the short-time Fourier transformation basic principle,and analyzes some non-steady signals such as the linear frequency modulation signal,and the method can describe how the signal frequency changes along with the time well,then can distinguish the signal very easily.This method has certain superiority compared to analyzing the signal by using the time domain or the frequency range alone
引文
[1]戴敬,王世立.LabVIEW基础教程[M].北京:国防工业出版社,2002.
[2]曹会国.基于LabVIEW的信号频域分析[J].泰山学院学报,2005,5(27):25-28.
[3]张凯,周陬,郭栋.LabVIEW虚拟仪器工程设计与开发[M].北京:国防工业出版社,2004.
[4]卢文祥,杜润生.机械工程测试?信息?信号分析(第二版)[M].武汉:华中科技大学出版社,1999.
[5]邹文,陈爱萍,顾汉明.联合时频分析技术在地震勘探中的应用[J].勘探地球物理进展,2004,8(27):246-250.
[6]钱世,黄林涛,许幼明.时-频联合分析法及其在海洋资料处理中的应用[J].海洋技术,1998,3(17):24-29.
[2]曹会国.基于LabVIEW的信号频域分析[J].泰山学院学报,2005,5(27):25-28.
[3]张凯,周陬,郭栋.LabVIEW虚拟仪器工程设计与开发[M].北京:国防工业出版社,2004.
[4]卢文祥,杜润生.机械工程测试?信息?信号分析(第二版)[M].武汉:华中科技大学出版社,1999.
[5]邹文,陈爱萍,顾汉明.联合时频分析技术在地震勘探中的应用[J].勘探地球物理进展,2004,8(27):246-250.
[6]钱世,黄林涛,许幼明.时-频联合分析法及其在海洋资料处理中的应用[J].海洋技术,1998,3(17):24-29.
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