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Toggle navigation Additional Book Information. Description Table of Contents. Features Demonstrates chaotic signal generation, modulation and demodulation techniques Describes a chaos approach to asynchronous DS-CDMA systems Explores channel equalization in chaotic communication systems Includes appendices that present the fundamental concepts of chaos and its modeling Summary The concept of transmitting information from one chaotic system to another derives from the observation of the synchronization of two chaotic systems.
Having developed two chaotic systems that can be synchronized, scientists can modulate on one phase signal the information to be transmitted, and subtract demodulate the information from the corresponding phase signal of the coupled chaotic system.
Chaos Applications in Telecommunications demonstrates this technique in various applications of communication systems. This book details methods of transmitting information at much higher levels of security than what is available by current techniques. Chaos communications is an application of chaos theory which is aimed to provide security in the transmission of information performed through telecommunications technologies.
By secure communications, one has to understand that the contents of the message transmitted are inaccessible to possible eavesdroppers. In chaos communications security i.
Chaos Applications in Telecommunications demonstrates this technique in various applications of communication systems. This book details. some applications of chaos theory will be analyzed in telecommunications applications for chaos we must first though understand the basics of what we mean.
Some properties of chaotic dynamics , such as complex behaviour , noise-like dynamics pseudorandom noise and spread spectrum , are used to encode data. On the other hand, chaos being a deterministic phenomenon, it is possible to decode data using this determinism. In practice, implementations of chaos communications devices resort to one of two chaotic phenomena: To implement chaos communications using such properties of chaos, two chaotic oscillators are required as a transmitter or master and receiver or slave.
At the transmitter, a message is added onto a chaotic signal and then, the message is masked in the chaotic signal. As it carries the information, the chaotic signal is also called chaotic carrier. Synchronizing of these oscillators is similar to synchronizing random neural nets in neural cryptography. When chaos synchronization is used, a basic scheme of a communications device Cuomo and Oppenheim is made by two identical chaotic oscillators. One of them is used as the transmitter, and the other as the receiver. They are connected in a configuration where the transmitter drives the receiver in such a way that identical synchronization of chaos between the two oscillators is achieved.
For the purpose of transmission of information, at the transmitter, a message is added as a small perturbation to the chaotic signal that drives the receiver.
In this way, the message transmitted is masked by the chaotic signal. When the receiver synchronizes to the transmitter, the message is decoded by a subtraction between the signal sent by transmitter and its copy generated at the receiver by means of the synchronization of chaos mechanism. This works because, whilst the transmitter output contains the chaotic carrier plus the message, the receiver output is made only by a copy of the chaotic carrier without the message.