A fast signal-dependent time-frequency representation

被引：0
|
作者：
Lin, YM [1 ]
Chan, FHY [1 ]
Lam, FK [1 ]
机构：
[1] Shantou Univ, Dept Phys, Shantou, Guangdong, Peoples R China
来源：
PROCEEDINGS OF THE 18TH ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY, VOL 18, PTS 1-5 | 1997年 / 18卷
关键词：
D O I：
暂无
中图分类号：
R318 [生物医学工程];
学科分类号：
0831 ;
摘要：
In last few years, in order to overcome some limitations of the short time Fourier transform (STFT), while avoiding the cross-terms that make the Wigner distribution difficult to interpret, some signal-dependent time-frequency representations(SDTFR) have been proposed. In this paper, we introduce a computationally efficient signal-dependent time-frequency method which is suitable for on-line analysis. This SDTFR uses a Gaussian window (GW) similar to STIR, but varies the parameter sigma of the GW with time to achieve high signal concentration and high resolution in time. The parameter sigma call be automatically calculated by the slope of instantaneous frequency (LF) and instantaneous bandwidth (IB) at that time.
引用
收藏
页码：1041 / 1042
页数：2
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