The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Récemment, un nouveau système CDMA multiporteuse (MC-CDMA) avec codage orthogonal à déplacement cyclique (CSOK) a été proposé et s'est révélé plus efficace en termes de spectre et d'énergie que les systèmes MC-CDMA conventionnels. Dans cet article, une nouvelle extension appelée système MC-CDMA multiplexé CSOK (MCSOK) est proposée pour augmenter encore le débit de données tout en maintenant un faible rapport puissance crête/puissance moyenne (PAPR). Premièrement, le flux de données est divisé en plusieurs sous-flux parallèles qui sont mappés en symboles QPSK-CSOK en termes de séquences Chu décalées cycliquement. Deuxièmement, ces séquences sont répétées, modulées, additionnées et placées sur des sous-porteuses IFFT, ce qui donne un signal multiplexé à module constant qui préserve l'orthogonalité souhaitée entre les sous-flux. Le récepteur effectue une égalisation dans le domaine fréquentiel et utilise des schémas efficaces de démultiplexage, de désétalement et de démappage pour détecter les symboles de modulation. De plus, une configuration alternative du système MCSOK avec une qualité de liaison élevée est également présentée. Les simulations montrent que le système MCSOK proposé atteint un PAPR et un BER inférieurs à ceux du système MC-CDMA conventionnel utilisant les codes de Walsh. Dans un environnement riche en trajets multiples, la configuration de haute qualité de liaison présente d'excellentes performances en termes de gain de diversité et de gain de modulation MCSOK.
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Juinn-Horng DENG, Jeng-Kuang HWANG, "A Low-PAPR Multiplexed MC-CDMA System with Enhanced Data Rate and Link Quality" in IEICE TRANSACTIONS on Communications,
vol. E93-B, no. 1, pp. 135-143, January 2010, doi: 10.1587/transcom.E93.B.135.
Abstract: Recently, a new multi-carrier CDMA (MC-CDMA) system with cyclic-shift orthogonal keying (CSOK) has been proposed and shown to be more spectral and power efficient than conventional MC-CDMA systems. In this paper, a novel extension called the multiplexed CSOK (MCSOK) MC-CDMA system is proposed to further increase the data rate while maintaining a low peak-to-average power ratio (PAPR). First, the data stream is divided into multiple parallel substreams that are mapped into QPSK-CSOK symbols in terms of cyclic shifted Chu sequences. Second, these sequences are repeated, modulated, summed, and placed on IFFT subcarriers, resulting in a constant-modulus multiplexed signal that preserves the desired orthogonality among substreams. The receiver performs frequency-domain equalization and uses efficient demultiplexing, despreading, and demapping schemes to detect the modulation symbols. Furthermore, an alternate MCSOK system configuration with high link quality is also presented. Simulations show that the proposed MCSOK system attains lower PAPR and BER, as compared to conventional MC-CDMA system using Walsh codes. Under a rich multipath environment, the high link quality configuration exhibits excellent performance with both diversity gain and MCSOK modulation gain.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E93.B.135/_p
Copier
@ARTICLE{e93-b_1_135,
author={Juinn-Horng DENG, Jeng-Kuang HWANG, },
journal={IEICE TRANSACTIONS on Communications},
title={A Low-PAPR Multiplexed MC-CDMA System with Enhanced Data Rate and Link Quality},
year={2010},
volume={E93-B},
number={1},
pages={135-143},
abstract={Recently, a new multi-carrier CDMA (MC-CDMA) system with cyclic-shift orthogonal keying (CSOK) has been proposed and shown to be more spectral and power efficient than conventional MC-CDMA systems. In this paper, a novel extension called the multiplexed CSOK (MCSOK) MC-CDMA system is proposed to further increase the data rate while maintaining a low peak-to-average power ratio (PAPR). First, the data stream is divided into multiple parallel substreams that are mapped into QPSK-CSOK symbols in terms of cyclic shifted Chu sequences. Second, these sequences are repeated, modulated, summed, and placed on IFFT subcarriers, resulting in a constant-modulus multiplexed signal that preserves the desired orthogonality among substreams. The receiver performs frequency-domain equalization and uses efficient demultiplexing, despreading, and demapping schemes to detect the modulation symbols. Furthermore, an alternate MCSOK system configuration with high link quality is also presented. Simulations show that the proposed MCSOK system attains lower PAPR and BER, as compared to conventional MC-CDMA system using Walsh codes. Under a rich multipath environment, the high link quality configuration exhibits excellent performance with both diversity gain and MCSOK modulation gain.},
keywords={},
doi={10.1587/transcom.E93.B.135},
ISSN={1745-1345},
month={January},}
Copier
TY - JOUR
TI - A Low-PAPR Multiplexed MC-CDMA System with Enhanced Data Rate and Link Quality
T2 - IEICE TRANSACTIONS on Communications
SP - 135
EP - 143
AU - Juinn-Horng DENG
AU - Jeng-Kuang HWANG
PY - 2010
DO - 10.1587/transcom.E93.B.135
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E93-B
IS - 1
JA - IEICE TRANSACTIONS on Communications
Y1 - January 2010
AB - Recently, a new multi-carrier CDMA (MC-CDMA) system with cyclic-shift orthogonal keying (CSOK) has been proposed and shown to be more spectral and power efficient than conventional MC-CDMA systems. In this paper, a novel extension called the multiplexed CSOK (MCSOK) MC-CDMA system is proposed to further increase the data rate while maintaining a low peak-to-average power ratio (PAPR). First, the data stream is divided into multiple parallel substreams that are mapped into QPSK-CSOK symbols in terms of cyclic shifted Chu sequences. Second, these sequences are repeated, modulated, summed, and placed on IFFT subcarriers, resulting in a constant-modulus multiplexed signal that preserves the desired orthogonality among substreams. The receiver performs frequency-domain equalization and uses efficient demultiplexing, despreading, and demapping schemes to detect the modulation symbols. Furthermore, an alternate MCSOK system configuration with high link quality is also presented. Simulations show that the proposed MCSOK system attains lower PAPR and BER, as compared to conventional MC-CDMA system using Walsh codes. Under a rich multipath environment, the high link quality configuration exhibits excellent performance with both diversity gain and MCSOK modulation gain.
ER -