Unified theory for wideband chaotic signal processing

Author(s):  
Berenice Verdin ◽  
Chandra Pappu ◽  
Benjamin C. Flores
Electronics ◽  
2018 ◽  
Vol 7 (12) ◽  
pp. 450 ◽  
Author(s):  
Denis Butusov ◽  
Timur Karimov ◽  
Alexander Voznesenskiy ◽  
Dmitry Kaplun ◽  
Valery Andreev ◽  
...  

The vulnerability of chaotic communication systems to noise in transmission channel is a serious obstacle for practical applications. Traditional signal processing techniques provide only limited possibilities for efficient filtering broadband chaotic signals. In this paper, we provide a comparative study of several denoising and filtering approaches: a recursive IIR filter, a median filter, a wavelet-based denoising method, a method based on empirical modes decomposition, and, finally, propose the new filtering algorithm based on the cascade of driven chaotic oscillators. Experimental results show that all the considered methods make it possible to increase the permissible signal-to-noise ratio to provide the possibility of message recognition, while the new proposed method showed the best performance and reliability.


2021 ◽  
pp. 45-51
Author(s):  
E. Bakunina ◽  
O. Dykyi

A chaos –geometric approach to investigation of complex chaotic dynamical systems is applied to an  analysis, modeling and processing the time series of emission intensities of chaotic transmitter/receiver systems (two unidirectionally coupled semiconductor laser systems in the all-optical scheme) suited for encoding at rates of GBit/s.  the problem of a signal processing is directly connected with the corresponding cybersecurity in some optical chaos communictaion systems. The  estimated values for the dynamic and  topologic invariants such as the correlation and Kaplan-York dimensions, Lyapunov indicators, Kolmogorov entropy etc  for investigated  chaotic signal time series of two unidirectionally coupled semiconductor laser systems in the all-optical scheme.


2003 ◽  
Vol 17 (2-3) ◽  
pp. 531-544 ◽  
Author(s):  
Yuri V. Andreyev ◽  
Alexander S. Dmitriev ◽  
Elena V. Efremova ◽  
Antonios N. Anagnostopoulos

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