相关偏置信号调制噪声和加性噪声驱动线性系统随机共振  

Stochastic resonance of a linear system with correlated bias signal-modulated noise and additive noise

作　　者：周玉荣[1,2] 何正友[1] 

机构地区：[1]西南交通大学电气工程学院,成都610031 [2]攀枝花学院电气信息工程学院,四川攀枝花617000

出　　处：《振动与冲击》2011年第11期171-174,共4页Journal of Vibration and Shock

摘　　要：研究了偏置信号调制噪声和加性噪声驱动线性系统的随机共振现象。根据线性系统理论,得到了系统输出信噪比的精确表达式。研究结果表明:系统输出信噪比是系统衰减常数、调制信号偏置参数、信号调制噪声强度和加性噪声强度的非单调函数。同时,系统输出信噪比随两种噪声的相关强度成非单调关系。The phenomenon of stochastic resonance（SR） of a linear system subjected to bias signal-modulated noise and additive noise was investigated.By use of linear system theory,the exact expression of the output signal-to-noise ratio（SNR） was provided.It is shown that the SNR is a non-monotonous function including the influencial variables of system attenuation parameter,signal bias,as well as intensities of the signal-modulated noise and the additive noise.In addition,the SNR behaves non-monotonically with the increase of correlated strength between the two noises.

关 键 词：随机共振 信号调制噪声 信噪比 

分 类 号：O211.64[理学—概率论与数理统计]