FM-DCSK: A Robust Modulation Scheme for Chaotic Communications

Geza KOLUMBAN  Gabor KIS  Zoltan JAKO  Michael Peter KENNEDY  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E81-A    No.9    pp.1798-1802
Publication Date: 1998/09/25
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Nonlinear Theory and Its Applications)
Category: Chaos, Bifurcation and Fractal
chaotic communication,  DCSK,  chaos,  communications,  

Full Text: PDF(448.7KB)>>
Buy this Article

In order to demodulate a Differential Chaos Shift Keying (DCSK) signal, the energy carried by the received chaotic signal must be determined. Since a chaotic signal is not periodic, the energy per bit carried by the chaotic signal can only be estimated, even in the noise-free case. This estimation has a non-zero variance that limits the attainable data rate. In this paper the DCSK technique is combined with frequency modulation in order to overcome the estimation problem and to improve the data rate of DCSK modulation.