Enhancement by noise in parallel arrays of sensors with power-law characteristics

François Chapeau-Blondeau, David Rousseau
2004 Physical Review E  
An optimally tuned power-law sensor is shown capable of amplifying the signal-to-noise ratio of a sine wave in Gaussian white noise. When associated in parallel arrays, further improvement can be obtained with independent noises injected on these sensors. This form of stochastic resonance in arrays, obtained here with smooth threshold-free nonlinearities, yields signal-to-noise ratio gains above unity in a true regime of added noise for a sine wave in Gaussian white noise, along with a class of
more » ... nonlinear devices with useful potentialities for noise-aided information processing.
doi:10.1103/physreve.70.060101 pmid:15697330 fatcat:sqpsbsfovng4hkz7ryhnvvgsbq