A Novel Method to Detect Initial Time of Weak Sinusoidal Signal Embedded in Non-stationary Noise

被引：0
|
作者：
Chen, Xinguo [1 ,2 ]
Yang, Xiaofei [1 ]
Xiong, Huihui [1 ]
Jun Ouyang [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Dept Elect Sci & Technol, Wuhan 430074, Peoples R China
[2] Wuhan Univ Sci & Technol, Coll Informat Sci & Engn, Wuhan 430081, Peoples R China
来源：
CIRCUITS SYSTEMS AND SIGNAL PROCESSING | 2011年 / 30卷 / 02期
基金：
美国国家科学基金会;
关键词：
Weak sinusoidal signal; Initial time; Wavelet transform; FFT;
D O I：
10.1007/s00034-010-9230-4
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The paper introduces a novel method to detect the initial time of a weak sinusoidal signal embedded in non-stationary noise and studies the performance of the method through numerical simulations. Furthermore, a proposed nonlinear function combined with time-frequency analysis can be used to effectively improve the signal-to-noise (SNR). Simulation results show that the method can rapidly detect the initial time of the weak analytical signal with a SNR lower than -54 dB and a time-domain resolution of only 1 second.
引用
收藏
页码：413 / 420
页数：8
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