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Analytical Evaluation of a Hybrid Chaotic Shift Keying [CS-QCSK] in a CDMA System

by K. Thilagam, K. Jayanthi
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International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 54 - Number 15
Year of Publication: 2012
Authors: K. Thilagam, K. Jayanthi
10.5120/8645-2544

K. Thilagam, K. Jayanthi . Analytical Evaluation of a Hybrid Chaotic Shift Keying [CS-QCSK] in a CDMA System. International Journal of Computer Applications. 54, 15 ( September 2012), 38-43. DOI=10.5120/8645-2544

@article{ 10.5120/8645-2544,
author = { K. Thilagam, K. Jayanthi },
title = { Analytical Evaluation of a Hybrid Chaotic Shift Keying [CS-QCSK] in a CDMA System },
journal = { International Journal of Computer Applications },
issue_date = { September 2012 },
volume = { 54 },
number = { 15 },
month = { September },
year = { 2012 },
issn = { 0975-8887 },
pages = { 38-43 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume54/number15/8645-2544/ },
doi = { 10.5120/8645-2544 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T20:55:47.722803+05:30
%A K. Thilagam
%A K. Jayanthi
%T Analytical Evaluation of a Hybrid Chaotic Shift Keying [CS-QCSK] in a CDMA System
%J International Journal of Computer Applications
%@ 0975-8887
%V 54
%N 15
%P 38-43
%D 2012
%I Foundation of Computer Science (FCS), NY, USA
Abstract

In recent years, various chaos based modulation schemes were evolved, of which the CS-DCSK modulation technique provides a better BER performance and bandwidth efficiency, due to its code domain approach[10]. The QCSK modulation technique provides double benefit, namely: higher data rate with similar BER performance and same bandwidth occupation as DCSK. By combining the advantage of code shifted differential chaos shift keying (CS-DCSK) and Quadrature chaos shift keying (QCSK) scheme, a novel CS-QCSK modulation scheme called code shifted Quadrature chaos shift keying is proposed. The noise performance of CS-QCSK is better to most conventional modulation schemes and also provides an increased data transmission rates with greatly improved robustness. Analytical expressions for the bit-error rates are derived for both AWGN channel and Rayleigh multipath fading channel. The simulation result shows that the proposed method outperforms the classical approaches in terms of bit error rate and spectral efficiency.

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Index Terms

Computer Science
Information Sciences

Keywords

Differential chaos shift keying (DCSK) Quadrature chaos shift keying (QCSK) Code shifted differential chaos shift keying (CS-DCSK) code shifted Quadrature chaos shift keying ( CS-QCSK) BER(Bit Error Rate)

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