Coherent demodulation of chaos shift keying

Stimulated by the fascinating chaotic synchronization principle proposed by Pecora and Carroll (1991) chaotic communications have recently aroused much interest in the area of secure communications because of the stochastic and complicated behavior of chaotic signals. In this paper, coherent demodulation of chaos shift keying (CSK) using Lorenz-based chaotic circuits is proposed. We prove the synchronization effect in a simple way, and the allowable bit rate is assessed. Thereafter the transient is shortened to obtain higher bit rate. By considering the influence of channel noise on the dynamics of the receiver, the error performance of CSK is evaluated.