Abstract
Chaotic communication has recently attracted great interests because of its potential applications in secure communications and spread spectrum communications. In a chaotic communication system, chaotic output from a transmitter is used as carrier waveform to encode a message. The chaotic waveform is noise-like in time series and broadband in spectrum. Therefore, the massage can be hidden by the chaotic waveform in both time and frequency domains. To recovery the message, a replica of the chaotic carrier has to be reproduced at the receiver side, which is achieved through chaos synchronization. Theory of chaos synchronization indicates that two identical systems can be synchronized in chaotic states if they are parameter-matched and are driven by a common force. Message decoding is then achieved by removing the chaotic carrier from the received signal at the receiver. On the other hand, eavesdroppers cannot recover the message because of the lack of information about the parameters.
© 2002 Optical Society of America
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