Noise Performance Analysis of Chaotic Coherent CSK Communication System

To provide a quantitative description for noisy multiuser performance of chaos-based communications, this paper presents an simple and effective approach for analyzing the noisy multiuser performance of coherent CSK (chaos-shift-keying) system with two basis functions under a noisy multiuser environment. Using a Logistic map as the chaotic signal and assuming ideal synchronization at receiver, the bit-error rate (BER) of CSK is derived in terms of the noisy intensity, the number of users and the length of bit sequence. The calculated BERs are consistent with those found from numerical simulations. In addition, the BER and it´s upon bound for single-user systems are the special results of this paper.