| Summary: | 碩士 === 國立雲林科技大學 === 電機工程系碩士班 === 91 === To develop the secure communication system is a popular information
industry, however how to promote the property and raise the security of
information is a mainly concerned in this thesis. In the study, we use the
characteristic of chaos to modulate the transmission signal combine the
concept of chaos synchronization control to establish a secure
communication system.
The idea of secure communication system is utilized chaotic signals to
mask or modulate the transmitter signal, thus guarantees that the message
can’t usurp during transmitting process. Based on nonlinear observer theory,
the observer gain can be obtained to that transmitter and receiver can be
achieved asymptotical, dead-beat or generalizaed synchronization.
Furthermore, we discuss how to design a controller by adaptive
backstepping technique, or employ the E.K.F adaptive law to estimate the
parameters and states of system. Therefore master-slave systems can be
achieved the so-called adaptive synchronization, when the system
parameters are unknown. Finally, some numerical simulations are given to
demonstrate that the method is feasible in secure communication.
Finally, we use CADs of digital system are completely, implement a
Henon system generator and a observer on FPGA chip. And the results is
feasible.
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