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Title: Chaos-based phase-shift keying compatible with conventional receiver architectures
Author: Harwood, Luke
Awarding Body: University of Bristol
Current Institution: University of Bristol
Date of Award: 2012
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Despite the lack of a universal mathematical framework for the analysis of chaotic systems, development of analysis techniques has been swift due both to the research interest in chaos theory from many diverse subjects and to the vast computing resources now available. However, many potential applications remain in the realm of theory. This thesis provides a link between chaos theory and communication systems, with the aim of developing a modulation technique capable of implementation with current technology. Although potentially very simple, chaotic systems result in extremely complex behaviour, resulting in loss of predictability in the long term. Their sensitive dependence on initial conditions enables large-scale changes to be effected with small control perturbations, and their aperiodic behaviour results in broad power spectra. The potential for an electronically simple chaos-based transmitter architecture, employing direct modulation of the passband chaotic oscillator, provides the motivation for this research. Building on the fundamental properties and analysis tools of chaotic systems, an intuitive exploration of the chaos generation mechanisms of several single-scroll chaotic attractors is developed, leading to the creation of several novel chaotic attractors and a discussion of their applications. The concept of a flexible chaotic oscillator-based transmitter architecture which is compatible with standard synchronisation and demodulation techniques is considered, and the resulting noise performance of both simulation and hardware implementations found to be competitive with standard modulation techniques. Additionally, a powerful baseband simulation technique is proposed and implemented, leading to the suggestion of a digital baseband implementation of the transmitter and its potential applications. , Avenues of further work are identified, providing direction for improvements of the proposed system and other related branches worthy of further study.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available