华东交通大学学报2016，Vol.33Issue(6)：103-109,7.
乘性噪声诱导复杂系统阵列信噪比增益
Signal-Noise-Ratio Gain from Array of Complex System Induced by Multiplicative Array Noise
摘要
Abstract
We investigated the array stochastic resonance induced by the multiplicative array noise in a parallel uncoupled array of identical bistable systems driven by the mixing signal of sinusoids and additive Gaussian white input noise. Our numerical simulating results showed that the signal-to-noise ratio gain could exceed unity for both subthreshold and suprathreshold sinusoids input when the array size reached a number. Interestingly , the region of SNR gain exceeding unity corresponding multiplicative noises could be extended as the array size arises. By simulating numerically the function limits of non-stationary array mean and stationary auto-convari-ance, we found that the performance of an infinite array can be approached by an array of two bistable oscilla-tors operating in different noisy conditions. The present nonlinear phenomenon of SNR gain exceeding unity in parallel uncoupled arrays not only represent a promising application in array signal processing of complex ran-dom systems but also proved a new scheme for stochastic dynamics induced by the array noises.关键词
阵列随机共振/信噪比/双稳系统/乘性阵列噪声Key words
array stochastic resonance/signal-noise-ratio(SNR)/bistable dynamic system/multiplicative array noise分类
数理科学引用本文复制引用
冯天荃,易鸣..乘性噪声诱导复杂系统阵列信噪比增益[J].华东交通大学学报,2016,33(6):103-109,7.基金项目
国家自然科学基金项目(31100752,11275259,91330113) （31100752,11275259,91330113）
