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|本期目录/Table of Contents|

组合窗函数的短时傅里叶变换时频表示方法

《探测与控制学报》[ISSN:1008-1194/CN:61-1316/TJ]

期数:
2010年03期
页码:
43
栏目:
出版日期:
2010-06-26

文章信息/Info

Title:
A Time-frequency Representation Method of STFT with Combining Window Functions
文章编号:
1008-1194(2010)03-0043-05
作者:
肖瑛; 冯长建
大连民族学院机电信息工程学院，辽宁 大连116600
Author(s):
XIAO Ying; FENG Changjian
College of Electromechanical and Information Engineering,Dalian Nationality University,Dalian 116600,China
关键词:
短时傅里叶变换; Heisenberg不确定性原理; 遥测; 振动信号
Keywords:
STFT; heisenberg uncertainty principle; telemetry; vibration signal
分类号:
TN911.7
DOI:
.
文献标识码:
A
摘要:
针对固定时间窗函数短时傅里叶变换（STFT）时频表示时间分辨率和频率分辨率相互制约，影响时频聚集性的缺陷，提出了一种组合窗函数的STFT时频表示方法。根据Heisenberg不确定性原理，分别利用长、短时间窗函数获得两组STFT时频表示，最终的时频表示以两组时频表示的乘积确定。仿真跳频信号和遥测振动数据处理结果表明：组合窗函数的STFT时频表示方法能有效提高STFT的时频聚集性，特别适用于跳频信号的分析。
Abstract:
Time resolution and frequency resolution of STFT with fixed length time window function restrain each other,which affects the time-frequency resolution.A method of combining window functions for STFT was proposed to solve this problem.Based on Heisenberg uncertainty principle,by using long,short window function,two sets of STFT time-frequency representation was obtained respectively.The final time-frequency representation was determined by the product of two time-frequency representation.The simulation frequency hopping signal and the vibration signal of telemetry processing results showed that the combination of window functions for STFT improved the time-frequency resolution of STFT effectivelly,which is especially suitable for frequency hopping signal analyse.

参考文献/References

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备注/Memo

备注/Memo:
*收稿日期：2010-01-14    修回日期：2010-05-23
基金项目：国家自然科学基金项目资助（50405023）
作者简介：肖瑛(1979-)，女，蒙古族，河北承德人，博士，讲师，研究方向：盲信号处理，智能信息处理等。E-mail：xiaoying@126.com。
更新日期/Last Update: 2010-07-13