Digital Communications with Chaos

Since the 1970's, there has been a great deal of research effort spent on studying chaotic systems and the properties of the chaotic signals generated. Characterized by their wideband, impulse-like autocorrelation and low cross-correlation properties, chaotic signals are useful spread-spectrum signals for carrying digital information. Spectrum spreading has become one of the most popular modulation techniques for high-speed wireless communications. It makes use of signals of very wide bandwidth to carry information at relatively low data rates, and possesses advantages such as low probability of interception, resistance to jamming, multiple-access capability and mitigation to multipath effect, which are particularly important in a wireless scenario. In addition to enjoying the aforementioned benefits, chaotic signals can be generated using simple circuitries, thus lowering the cost of transceivers.

1. Introduction 2. Chaos-Based Digital Communication Systems 3. Multiple-Access Coherent Antipodal Chaos-Shift-Keying Systems 4. Multiuser Detection Techniques for Multiple-Access Coherent Antipodal Chaos-Shift-Keying Systems 5. Multiple-Access Generalized Correlation Delay-Shift-Keying Systems 6. Enhancements of Correlation-Delay-Shift-Keying Scheme 7. Multiple-Access Scheme Utilizing Transmitted References And Training Sequences 8. Near-Optimum Communication Schemes