Information-theoretic measures improved by noise in nonlinear systems

Stochastic resonance is a phenomenon whereby the trans-mission of a signal by certain nonlinear systems can be im-proved by addition of noise. We propose a brief overview of this effect, together with an extension based on information-theoretic concepts. We analyze various conditions of non-linear transmission where the input–output Shannon mutual information, the input–output Kullback divergence, or the input–output Fisher information can receive improvement from noise addition, demonstrating different forms of noise-enhanced transmission