| 窗函数的选择对时频域测试分析的影响 |
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| 引用本文： | 杨文兴,杨俊智,周强.窗函数的选择对时频域测试分析的影响[J].新技术新工艺,2014(3):101-103. |
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| 作者姓名： | 杨文兴 杨俊智 周强 |
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| 作者单位： | [1]兰州理工大学机电工程学院,甘肃兰州730050 [2]兰州电源车辆研究所有限公司,甘肃兰州730050 |
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| 摘 要： | 在LabVIEW平台的基础上,研究了利用时频域测试方法,分析数字信号(以下简称信号)在时-频平面内时间与频率之间的变化关系。该测试分析方法利用短时傅里叶变换(STFT)的基本原理,对一些非平稳的信号进行分析,但在信号处理过程中,能得到的信号长度总是有限的;所以,需对无限长的时间序列施加1个窗函数,在此基础上,分析窗函数的选择对其时频域分析的影响。
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| 关 键 词： | LabVIEW 时频域分析 短时傅里叶变换 窗函数 非平稳信号 |
Influence Analysis of Time-frequency Window Function Selection Test. |
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| YANG Wenxing,YANG Junzhi,ZHOU Qiang.Influence Analysis of Time-frequency Window Function Selection Test.[J].New Technology & New Process,2014(3):101-103. |
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| Authors: | YANG Wenxing YANG Junzhi ZHOU Qiang |
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| Affiliation: | 1. Institute of Electrical and Mechanical, Lanzhou University of Technology , Lanzhou 730050, Chinas 2. Lanzhou Power Station b- Vehicle Institute Co. ,Ltd, Lanzhou 730050, China) |
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| Abstract: | Based on the LabVIEW platform, it was studied that analyzing the signal in the time-frequency plane between the time and frequency by using frequency domain test method. This testing method did some of the non-stationary signal analysis by using the short time variations of Fu Liye （STFT） theory. But in the digital signal processing, signal length gotten is always limited, so it is needed to impose a window function on the time series of infinite length. On this basis, the influence of window function selection on time frequency domain was analyzed, this paper has certain reference value for researchers engaged in signal processing. |
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| Keywords: | LabVIEW time and frequency domain analysis STFT window function non-stationary signal |
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