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Journal of Engineering
Volume 2017, Article ID 7404197, 9 pages
https://doi.org/10.1155/2017/7404197
Research Article

Analysis and Design of an Energy Efficient Differential Coherent Chaos Based System in Additive White Gaussian Noise Environment

1Middle East College, Muscat, Oman
2Asia Pacific International College, Sydney, NSW 2008, Australia

Correspondence should be addressed to Nizar Al Bassam; ku.oc.oohay@yboohrazan

Received 24 March 2017; Revised 6 June 2017; Accepted 28 June 2017; Published 3 August 2017

Academic Editor: Daesik Hong

Copyright © 2017 Nizar Al Bassam and Oday D. Jerew. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A new differential coherent chaos based scheme is proposed and named as Differential Chaos ON-OFF Keying (DCOOK). The proposed scheme provides reduction in bit energy and better bit error performance at large spreading factor. This is achieved by presenting each transmitted bit by either identical segment or no transmission within same bit duration. The receiver performs simple correlation between the received signal and its delayed version to determine the transmitted information utilizing the low correlation between the noise signals. The bit error rate (BER) performance of the proposed scheme is evaluated analytically using Gaussian Approximation (GA) method and compared with the simulation results. The results show excellent agreement between the derived expression and simulation. Moreover, the BER of DCOOK scheme is compared with the standard chaos systems: Chaos ON-OFF Keying (COOK), Differential Chaos Shift Keying (DCSK), and Correlation Delay Shift Keying (CDSK). The comparison results show that DCOOK scheme can always achieve superior performance compared to COOK and CDSK schemes and even exceeds the performance of DCSK scheme at typical spreading factor values.