A Low-PAPR Multiplexed MC-CDMA System with Enhanced Data Rate and Link Quality

Juinn-Horng DENG; Jeng-Kuang HWANG

doi:10.1587/transcom.E93.B.135

A Low-PAPR Multiplexed MC-CDMA System with Enhanced Data Rate and Link Quality

Juinn-Horng DENG, Jeng-Kuang HWANG

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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.

Publication: IEICE TRANSACTIONS on Communications Vol.E93-B No.1 pp.135-143

Publication Date: 2010/01/01

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Online ISSN: 1745-1345

DOI: 10.1587/transcom.E93.B.135

Type of Manuscript: PAPER

Category: Wireless Communication Technologies

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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

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@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},}

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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 -