Πλοήγηση ανά Συγγραφέα "Anagnostopoulos, A. N."
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Τεκμήριο Digital chaotic synchronized communication system(2009) Stavrinides, S. G.; Anagnostopoulos, A. N.; Miliou, A. N.; Valaristos, A.; Magafas, L.; Kosmatopoulos, K.; Papaioannou, S.The experimental study of a secure chaotic synchronized communication system is presented. The synchronization between two digital chaotic oscillators, serving as a transmitter-receiver scheme, is studied. The oscillators exhibit rich chaotic behavior and are unidirectionally coupled, forming a master-slave topology. Both the input information signal and the transmitted chaotic signal are digital ones.Τεκμήριο The nonlinear current behaviour of a driven R–L-Varactor in the low frequency range(2009-04) Kalomiros, J. A.; Stavrinides, S. G.; Miliou, A. N.; Antoniades, I. P.; Magafas, L.; Anagnostopoulos, A. N.The nonlinear behaviour of an R–L-Varactor circuit, simulated by Multisim 7.0 at a driving frequency that is below the circuit resonance frequency, is reported and evaluated. A new high amplitude oscillation is observed and attributed to the emergence of a large diode junction capacitance. Increasing the driving signal amplitude, the circuit is led to a non-periodic mode of operation, producing trajectories of increasing chaotic content in a four-dimensional phase space. At specific amplitudes a two-dimensional tori was monitored, where trajectories are periodic, like in a two oscillator system with commensurate frequencies. Poincaré cross-sections, FFT spectra and correlation dimension calculations, suggest the quasi-periodicity route to chaos.