Open-loop frequency response for a chaotic masking system |
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Authors: | Huang Xian-Gao Yu Pei and Huang Wei |
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Affiliation: | College of Engineering, Shantou University, Shantou 515063, China; Department of Applied Mathematics, The University of Western Ontario, London, Ontario, Canada N6A 5B7, Canada; School of Electronics and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China |
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Abstract: | In this paper, a new numerical simulation approach is proposed for the
study of open-loop frequency response of a chaotic masking system. Using
Chua's circuit and the Lorenz system as illustrative examples, we have shown
that one can employ chaos synchronization to separate the feedback network
from a chaotic masking system, and then use numerical simulation to obtain
the open-loop synchronization response, the phase response, and the
amplitude response of a chaotic masking system. Based on the analysis of the
frequency response, we have also proved that changing the amplitude of the
exciting (input) signal within normal working domain does not influence the
frequency response of the chaotic masking system. The new numerical
simulation method developed in this paper can be extended to consider the
open-loop frequency response of other systems described by differential or
difference equations. |
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Keywords: | open-loop frequency response chaotic masking system |
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