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".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Baru-baru ini, sistem CDMA (MC-CDMA) berbilang pembawa baharu dengan kekunci ortogonal anjakan kitaran (CSOK) telah dicadangkan dan ditunjukkan sebagai lebih spektrum dan cekap kuasa berbanding sistem MC-CDMA konvensional. Dalam makalah ini, sambungan baru yang dipanggil sistem MC-CDMA CSOK (MCSOK) berganda dicadangkan untuk meningkatkan lagi kadar data sambil mengekalkan nisbah kuasa puncak kepada purata (PAPR) yang rendah. Pertama, aliran data dibahagikan kepada berbilang substream selari yang dipetakan ke dalam simbol QPSK-CSOK dari segi jujukan Chu anjakan kitaran. Kedua, jujukan ini diulang, dimodulasi, dijumlahkan dan diletakkan pada subpembawa IFFT, menghasilkan isyarat pemultipleks modulus malar yang mengekalkan ortogonal yang diingini di kalangan substream. Penerima melakukan penyamaan domain frekuensi dan menggunakan skema demultiplexing, despreading dan demapping yang cekap untuk mengesan simbol modulasi. Tambahan pula, konfigurasi sistem MCSOK alternatif dengan kualiti pautan tinggi turut dipersembahkan. Simulasi menunjukkan bahawa sistem MCSOK yang dicadangkan mencapai PAPR dan BER yang lebih rendah, berbanding sistem MC-CDMA konvensional menggunakan kod Walsh. Di bawah persekitaran berbilang laluan yang kaya, konfigurasi kualiti pautan tinggi mempamerkan prestasi cemerlang dengan kedua-dua keuntungan kepelbagaian dan keuntungan modulasi MCSOK.
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Salinan
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
Salinan
@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},}
Salinan
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 -