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Mathematical Problems in Engineering
Volume 2014 (2014), Article ID 437843, 14 pages
Research Article

Parallel Array Bistable Stochastic Resonance System with Independent Input and Its Signal-to-Noise Ratio Improvement

Harbin Institute of Technology Shenzhen Graduate School, Shenzhen 518055, China

Received 6 March 2014; Revised 10 July 2014; Accepted 12 July 2014; Published 27 August 2014

Academic Editor: Wuquan Li

Copyright © 2014 Wei Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We study the design enhancement of the bistable stochastic resonance (SR) performance on sinusoidal signal and Gaussian white noise. The bistable system is known to show an SR property; however the performance improvement is limited. Our work presents two main contributions: first, we proposed a parallel array bistable system with independent components and averaged output; second, we give a deduction of the output signal-to-noise ratio (SNR) for this system to show the performance. Our examples show the enhancement of the system and how different parameters influence the performance of the proposed parallel array.