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Stochastic Resonance in Sequential Detectors

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4 Author(s)
Guerriero, M. ; Electr. & Comput. Eng. Dept., Univ. of Connecticut, Storrs, CT ; Marano, S. ; Matta, V. ; Willett, P.

Stochastic resonance (SR) is a nonlinear phenomenon known in physics that has attracted recent interest in the signal-processing literature, and specifically in the context of detection. We investigate the SR effect arising in sequential detectors for shift-in-mean binary hypothesis testing and characterize the optimal resonance as the solution of specific optimization problems. One particular (and at first glance perhaps counterintuitive) finding is that certain sequential detection procedures can be made more efficient by randomly adding or subtracting a suitable constant value to the data at the input of the detector.

Published in:

Signal Processing, IEEE Transactions on  (Volume:57 ,  Issue: 1 )

Date of Publication:

Jan. 2009

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