Stochastic resonance driven by time-delayed feedback in a bistable system with colored noise

被引：8
|
作者：
Gu, X. [1 ,2 ]
机构：
[1] Suzhou Univ, Suzhou 215000, Jiangsu, Peoples R China
[2] Nanjing Inst Railway Technol, Nanjing 215000, Jiangsu, Peoples R China
来源：
EUROPEAN PHYSICAL JOURNAL D | 2012年 / 66卷 / 03期
关键词：
INDUCED TRANSITIONS; APPROXIMATION; PHASE; MODEL;
D O I：
10.1140/epjd/e2012-20151-5
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The phenomenon of stochastic resonance (SR) driven by time-delayed feedback in a bistable system with colored noise is investigated. Combining the small time delay and unified colored noise approximation, the Fokker-Planck equation is obtained. The different effects of time delay and noise correlation time on stationary probability density and signal-to-noise ratio (SNR) are discussed respectively. It is found that time delay can markedly improve the output SNR. This method can be practically applied to many fields such as weak signal extraction, recovery and so on. Numerical simulations are presented and are in agreement with the approximate theoretical results.
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页数：6
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