A note on chaos-based communication schemes

In this work, a modified chaos-based communication scheme is presented. In particular, we extend the basic scheme for chaotic masking using a single transmission channel proposed by Cuomo and coworkers in 1993. The substantial differences between the traditional scheme and this modified one, significantly affect the reception quality of the sent message, such that this one can faithfully be recovered without filtering at the receiver end, without considering the effect of noise in the transmission channel. Nevertheless, if noise is present, this can be eliminated using a filtering stage. We use two Lorenz systems unidirectionally coupled, the first like a master/transmitter system and the other like a slave/receiver system in order to illustrate with some numerical simulations the effectiveness of the modified scheme.