| Summary: | 碩士 === 國立雲林科技大學 === 電機工程系碩士班 === 93 === In this thesis, we study several issues of digital chaotic communication system, including chaos demodulator, the time sequence of the signal frame, channel effect and characteristic curve of BER (bit error rate).
There are three parts that are discussed in this thesis. Firstly, we introduce the characteristic of chaos and CSK/DCSK technological of chaotic communication. In addition, the scheme of non-coherent DCSK system which is used to improved the performance of CSK system. Next, non-coherent ATF and IA demodulators of chaotic communication system are discussed in the thesis. Finally, we propose a scheme of the chaotic synchronization in digital communication system based on extend Kalman filter (EKF). The chaotic discrete communication based on the EKF can be proven to provide the highest performance than another scheme of chaotic discrete communication systems.
By, comparing the performance of four chaos systems, and analyzing the relation between the simulation of BER curve. A high performance chaotic discrete communication system is proposed under the environment of single-user or multi-user in the thesis. Furthermore, we expect to develop an adaptive and robust scheme of communication system in the future.
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