Volume 81, Number 4, February 2008
|Number of page(s)||5|
|Published online||21 January 2008|
Experimental demonstration of bidirectional chaotic communication by means of isochronal synchronization
Nonlinear Dynamics and Chaos Group, Departamento de Física, Universidad Rey Juan Carlos Tulipán s/n, 28933 Móstoles, Madrid, Spain
Accepted: 17 December 2007
We give the first experimental demonstration of simultaneous bidirectional communication through chaotic carriers thanks to the phenomenon of isochronal synchronization. Two Mackey-Glass electronic circuits with chaotic behaviour exchange their signals through a coupling line with delay. When the internal feedback of the circuits and the coupling are accurately matched, isochronal synchronization arises. Under this dynamical regime, we introduce a binary message at both outputs and recover it at the opposite circuit. Finally, we discuss the security of this kind of communication system by analyzing the message recovered by a potential eavesdropper.
PACS: 05.45.Xt – Synchronization; coupled oscillators / 42.55.Px – Semiconductor lasers; laser diodes / 42.65.Sf – Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics
© EPLA, 2008
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