Performance of Differential Chaos-Shift-Keying Digital Communication Systems over Several Common Channels

摘要

Using chaotic signals in spread-spectrum communications has a few clear advantages over traditional approaches. Chaotic signals are nonperiodic, wide-band, and more difficult to predict, reconstruct, and characterize than periodic carriers. These properties of chaotic signals make it more difficult to intercept and decode the information modulated upon them. The differential chaos shift keying (DCSK) is a non-coherent modulation scheme, and has good anti-noise performance. In this paper, based on the fundamental theories and with some recent researches of others, the DCSK performance is analyzed and the expressions of the bit error rates are derived for DCSK under AWGN channel, Rayleigh fading channel and Ricean fading channel. In the end, the Logistic mapping with zero mean is used for chaos generation in simulation and compared with simulation results.