RECEPTION DEVICE BASED ON STOCHASTIC RESONANCE

Abstract

Since the past two decades, a growing interest has been devoted to stochastic resonance (S.R.) in many fields' , like biology2 , electronic c i r c ~ i t s ~ > ~ , visual perception ... . Until now, most of the studies concerning S.R. have shown that an appropriate amount of noise, acting as an external control element, enhances the response of a nonlinear system to a deterministic excitation'. The case of a periodic excitation was first considered in a single stochastic resonator, like a comparator for instance5. More recently, this effect has been investigated in chains of such coupled stochastic resonator^^^^^^, and extended to aperiodic excitations, especially in the field of neural science, leading to the term of aperiodic stochastic resonance. However, no study has been yet devoted to applications or interpretations of the noisy signal at the output of a stochastic resonator. Here, we propose an electronic reception deviceg , called Stochastic Resonator Receiver (S.R.R.), which allows to rescue a subthreshold digital amplitude modulated (A.M.) information signal using a translator of the output of a stochastic resonator. An information rescuing of one hundred percent can be then reached for both uniform and gaussian noise distributions.