UNSPECIFIED. (2003) Signal detection via residence times statistics: Noise-mediated minimization of the measurement error. PHYSICAL REVIEW E, 68 (3 Part 2). -. ISSN 1063-651X

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Abstract

We study the problem of detecting a small dc signal by quantifying its effect on the mean difference DeltaT in residence times in the stable steady states of a bistable dynamical measurement device, in the presence of a noise floor and a known time-sinusoidal bias signal. Errors in the measurement process occur due to a finite observation time that is present in most practical scenarios. The error is found to have a nonmonotonic dependence on the noise intensity; at a critical noise intensity, the error is minimized. This phenomenon, reminiscent of the well-known stochastic resonance effect, can also be obtained by adjusting the device tuning parameters for a given noise floor. The effect appears to be most pronounced for subthreshold bias signals in the strongly nonlinear response regime.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Journal or Publication Title:	PHYSICAL REVIEW E
Publisher:	AMERICAN PHYSICAL SOC
ISSN:	1063-651X
Date:	September 2003
Volume:	68
Number:	3 Part 2
Number of Pages:	4
Page Range:	-
Identification Number:	10.1103/PhysRevE.68.036133
Publication Status:	Published
URI:	http://wrap.warwick.ac.uk/id/eprint/9241

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