可用于高阶调制的伪正交载波干涉MC-CDMA方案

doi:10.13190/jbupt.200704.14.090

北京邮电大学学报 ›› 2007, Vol. 30 ›› Issue (4): 14-18.doi: 10.13190/jbupt.200704.14.090

可用于高阶调制的伪正交载波干涉MC-CDMA方案

张炎炎1,陶小峰1,朱晓暄1，YAMAMOT Toshiaki2

1.北京邮电大学泛网无线通信教育部重点实验室，北京 100876; 2.KDDI电信研发中心，横须贺 2390847

收稿日期:2006-09-06 修回日期:2007-01-17 出版日期:2007-08-30 发布日期:2007-08-30
通讯作者: 张炎炎

A PO-CI/MC-CDMA Scheme for High Modulation Styles

1.Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, China; 2.KDDI Research & Development Labs, Yokosuka Kanagawa 2390847, Japan

Received:2006-09-06 Revised:2007-01-17 Online:2007-08-30 Published:2007-08-30

摘要/Abstract

摘要：

通过对伪正交载波干涉（POCI）序列在不同调制方式下扩频解扩原理的分析，论证了其在复信号高阶调制（如四相移相键控（QPSK）、正交幅度调制（QAM）等）下无法正确解码，在此基础上提出了一种可行的扩频调制结构. 该结构结合POCI扩频码，使用脉冲幅度调制（PAM）方式取代通常使用的复信号调制方式，能在仅有很小性能损失且不增加系统带宽的条件下，将传统多载波码分多址接入（MCCDMA）系统容量提高2倍.

关键词: 伪正交载波干涉；脉冲幅度调制；扩频/解扩；多载波码, 分多址接入；系统容量

Abstract:

Through theoretical spreading principle analysis, it is proved that the benefit of pseudo-orthogonal carrier interferometry (PO-CI) spreading code is not able to be supported when complex signal modulation(for example,quadrature phase-shift keying(QPSK) and quadrature amplitude modu-lation (QAM)) types are employed. On this basis, a feasible structure for its solution is brought forward. Within the structure mentioned, instead of complex modulation patterns, pulse amplitude modulation (PAM) combined with PO-CI spreading code is utilized, it manages to maintain the doubled throughput increase of multicarrier code division multiple access （MC-CDMA） system with minimal loss in performance and no bandwidth expansion.

Key words: pseudo-orthogonal carrier interferometry, pulse amplitude modulation, spreading/despreading, multi-carrier code division multiple access, doubled throughput

中图分类号:

TN911.22

张炎炎1,陶小峰1,朱晓暄1，YAMAMOT Toshiaki2. 可用于高阶调制的伪正交载波干涉MC-CDMA方案[J]. 北京邮电大学学报, 2007, 30(4): 14-18.

参考文献

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可用于高阶调制的伪正交载波干涉MC-CDMA方案

A PO-CI/MC-CDMA Scheme for High Modulation Styles

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