一种适合多载波码分多址系统的扩频序列

doi:10.11959/j.issn.1000-0801.2015305

摘要/Abstract

摘要：

多载波码分多址（MC-CDMA）技术结合了正交频分复用（OFDM）技术和码分多址（CDMA）技术的优点，具有数据传输速率高、频谱利用率高、抗干扰能力强和系统容量大的优点，是现阶段备受瞩目的一种无线通信方式。由于该通信系统中的码分多址技术结合了多载波调制技术，所以要求该系统中使用的扩频序列在兼具良好的自相关、互相关特性的同时，还要有较低的峰均比，这对扩频序列的设计提出了较高的要求。为了满足上述要求，设计了一种以Golay码为基础码，以m序列对Golay码进行加扰的扩频序列，该扩频序列具有良好的自相关、互相关特性，且峰均比较低。通过对比仿真验证，证明了本文中设计的扩频序列具有良好的特性，适用于MC-CDMA系统。

关键词: MC-CDMA, 扩频序列, Golay码, m序列

Abstract:

The MC-CDMA system takes the advantages of the OFDM system and the CDMA system.The MC-CDMA system is a kind of wireless communication aroused an ongoing and growing research interests,which has the characteristics of high bit transmission rate,high bandwidth efficiency,anti-jamming,and a large system capacity.Since the MC-CDMA system includes the multi-carrier modulation,it is difficult to design a spread spectrum sequence performing not only a high level of self-correlation and cross-correlation but also a low peak-to-average power ratio in the MC-CDMA system.To solve this problem,a spread spectrum sequence which was modulated by Golay code and m sequence was proposed.The spread spectrum sequence proposed owned a good performance in self-correlation,cross-correlation and peak-to-average power ratio.The simulation results show the effectiveness and the superiority of the proposed spread spectrum sequence.

Key words: MC-CDMA, spread spectrum sequence, Golay code, m sequence

张志成,黄小娜,熊丽. 一种适合多载波码分多址系统的扩频序列[J]. 电信科学, 2015, 31(11): 60-66.

Zhicheng Zhang,Xiaona Huang,Li Xiong. A Spread Spectrum Sequence for MC-CDMA System[J]. Telecommunications Science, 2015, 31(11): 60-66.

图/表 5

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