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应用科学学报 ›› 2004, Vol. 22 ›› Issue (4): 428-432.

• 论文 • 上一篇    下一篇

M元双正交码扩频多载波CDMA系统

徐信, 蔡跃明, 白宾峰, 程云鹏   

  1. 解放军理工大学通信工程学院无线通信系 江苏南京 210007
  • 收稿日期:2003-05-13 修回日期:2003-09-18 出版日期:2004-12-31 发布日期:2004-12-31
  • 作者简介:徐信(1970-),男,河北新乐人,工程师,硕士生;蔡跃明(1961-),男,福建永泰人,教授,博导.
  • 基金资助:
    江苏省自然科学基金(BK2003015);国家973计划基金(5130601)资助项目

A M-Ary Biorthogonal Code SS Multicarrier CDMA System

XU Xin, CAI Yue-ming, BAI Bin-feng, CHENG Yun-peng   

  1. Department of Radio Communications ICE, PLAUST, Nanjing 210007, China
  • Received:2003-05-13 Revised:2003-09-18 Online:2004-12-31 Published:2004-12-31

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摘要： 提出了一种高速M元双正交码扩频多载波CDMA系统.该系统使用正交BPSK调制和双正交扩频码携带信息,通过信道估计消除了多径衰落产生的相位模糊,避免了单/双正交扩频码识别问题.文中使用了改进的子空间跟踪信道估计算法,并仿真了不同信道估计方法、合并方法下系统的误比特率性能.

关键词: 码分多址, 多载波码分多址, 多进制双正交码扩频, 正交频分复用

Abstract: In this paper, a M-ary biorthogonal code spread spectrum (SS) high data rate multicarrier code division multiple access (CDMA) system is proposed. The system uses quadrature BPSK modulation and biorthogonal SS code to take data bits. Channel estimation eliminates the ambiguities of the phase generated by channel fading, and avoids the identification problem of the single/dual SS code. We use a modified subspace tracking channel estimation algorithm and simulate the system BER performance under different channel estimation approaches and combining methods.

Key words: multicarrier CDMA, M-ary biorthogonal code spectrum spread, CDMA, OFDM

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