Title :
A new hybrid DCSK-CDSK scheme for Chaos based communications
Author :
Albassam, Nizar N.
Author_Institution :
Dept. of Electron. & Commun., Middle East Coll., Muscat, Oman
Abstract :
In this paper, a new noncoherent chaos based communication scheme is presented. System is a hybrid combination of Differential Chaos Shift Keying (DCSK) and Correlation Delay Shift Keying (CDSK) schemes. Here, reference signal block is the sum of outputs from two identical chaos signal generators shifted from each other by a fixed delay, and then each pair of bits is modulated using the same output of the individual chaos signal generator. Simply, the system utilizes the low cross correlation value between chaos samples and its delayed version. Bit-error performance in additive-white-Gaussian-noise of the proposed system is analyzed and compared with the other conventional chaos based communication systems. Clear matching between theoretical expression and simulations result is obtained at high spreading factor.
Keywords :
AWGN channels; chaos generators; chaotic communication; correlation methods; error statistics; modulation; spread spectrum communication; additive-white-Gaussian-noise; bit-error performance; chaotic spread spectrum modulation systems; correlation delay shift keying scheme; differential chaos shift keying scheme; hybrid DCSK-CDSK scheme; identical chaos signal generators; noncoherent chaos based communication scheme; reference signal block; Bit error rate; Chaotic communication; Communication systems; Correlation; Delays; Receivers; Spreading factor; correlation delay; diffrential chaos; hybrid; noncoherent;
Conference_Titel :
Information and Communication Systems (ICICS), 2014 5th International Conference on
Conference_Location :
Irbid
Print_ISBN :
978-1-4799-3022-7
DOI :
10.1109/IACS.2014.6841977
