Decreasing bit error rate by using enhanced tristable logical stochastic resonance in heavy noise condition

Abstract

ABSTRACT Logical stochastic resonance (LSR) is a nonlinear phenomenon that the logical operation of two logical input signals can be realized with the assistance of proper noise. The traditional LSR is based on a bistable system, but the performance of logical operation is limited when the noise is too heavy. Given this, this study proposes a new LSR method based on a tristable potential. The effects of the tristable LSR under different parameters are validated by using logical success rates. AND and OR logical behaviors are verified by optimizing the system parameters. Simulation analyses show that the output waveform processed by the tristable LSR is better than that processed by the traditional bistable LSR on the aspects of noise interference, waveform smoothness, and bit error rate. This study shows potential applications in realizing logical operation under the condition of heavy background noise.