Publication Date
2010
Document Type
Thesis
Committee Members
Yao Ma (Committee Member), Chakravarthy Vasu (Committee Member), Zhiqiang Wu (Advisor), Zhiqiang Wu (Committee Member)
Degree Name
Master of Science in Engineering (MSEgr)
Abstract
Chaotic systems are deterministic non-linear dynamical systems which have intrinsic properties such as: irregularity, aperiodicity, and are impossible to predict over long periods of time. Cognitive radio on the other hand, has emerged recently as a powerful means to tackle the spectrum congestion problem. The goal of this thesis is to combine the benefits of the chaos communication system with the cognitive radio to create a robust, highly secure, flexible chaotic cognitive radio system. We first begin with a short survey of chaotic communication and cognitive radio technology. Then we compare chaotic waveforms to other conventional PN sequences and show its superiority in security and multiuser capabilities. We then propose a novel frequency domain based chaos communication system that is capable of operating over multiple non-contiguous frequency bands. Furthermore, we analyze the performance of this system in different channel models and in multiuser scenarios. Finally, we implement carrier-interferometry sequences along with the chaos sequence to increase the security and performance of the system.
Page Count
61
Department or Program
Department of Electrical Engineering
Year Degree Awarded
2010
Copyright
Copyright 2010, all rights reserved. This open access ETD is published by Wright State University and OhioLINK.
