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Proceedings Paper

Revisiting the asymmetric binary channel: joint noise-enhanced detection and information transmission through threshold devices
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Paper Abstract

In this paper we revisit the asymmetric binary channel from the double point of view of detection theory and information theory. We first evaluate the capacity of the asymmetric binary channel as a function of the probabilities of false alarm and of detection, thus allowing a noise distribution independent analysis. This sets the a priori probabilities of the hypotheses and couples the two points of view. We then study the simple realization of the asymmetric binary channel using a threshold device. We particularly revisit noise-enhanced processing for subthreshold signals using the aforementioned parametrization of the capacity, and we report a somewhat paradoxical effect: using the channel at its capacity precludes in general an optimal detection.

Paper Details

Date Published: 23 May 2005
PDF: 11 pages
Proc. SPIE 5845, Noise in Complex Systems and Stochastic Dynamics III, (23 May 2005); doi: 10.1117/12.609436
Show Author Affiliations
Pierre-Olivier Amblard, Lab. des Images et des Signaux, CNRS, ENSIEG (France)
Olivier J. J. Michel, Lab. Univ. d'Astrophysique de Nice, CNRS, Univ. de Nice Sophia-Antipolis (France)
Saverio Morfu, Lab. d'Electronique, CNRS, Univ. de Bourgogne (France)

Published in SPIE Proceedings Vol. 5845:
Noise in Complex Systems and Stochastic Dynamics III
Laszlo B. Kish; Katja Lindenberg; Zoltan Gingl, Editor(s)

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