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A Threshold Enhancement Technique for Chaotic On-Off Keying Scheme
Nizar Naji Albassam , Sumesh Eratt Parameswaran, Vidhya Lavanya Ramachandran
Pages - 25 - 37     |    Revised - 30-06-2015     |    Published - 31-07-2015
Volume - 9   Issue - 3    |    Publication Date - July 2015  Table of Contents
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KEYWORDS
Chaotic Communication, Error Probability, Correlation, Sequences, Gaussian Distribution.
ABSTRACT
In this paper, an improvement for Chaotic ON-OFF (COOK) Keying scheme is proposed. The scheme enhances Bit Error Rate (BER) performance of standard COOK by keeping the signal elements at fixed distance from the threshold irrespective of noise power. Each transmitted chaotic segment is added to its flipped version before transmission. This reduces the effect of noise contribution at correlator of the receiver. The proposed system is tested in Additive White Gaussian Noise (AWGN) channel and compared with the standard COOK under different Eb/No levels. A theoretical estimate of BER is derived and compared with the simulation results. Effect of spreading factor increment in the proposed system is studied. Results show that the proposed scheme has a considerable advantage over the standard COOK at similar average bit energy and with higher values of spreading factors.
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Dr. Nizar Naji Albassam
Middle East College - Oman
nazarhooby@yahoo.co.uk
Dr. Sumesh Eratt Parameswaran
Middle East College Electronics and Communications Engineering Departme nt Oman - Oman
Dr. Vidhya Lavanya Ramachandran
Anna University, Chennai, India - India