北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2007, Vol. 30 ›› Issue (5): 24-27.doi: 10.13190/jbupt.200705.24.wangj

• 论文 • 上一篇    下一篇

频率域序列检测的多载波系统

王竞,李道本   

  1. ( 北京邮电大学 信息工程学院, 北京 100876)
  • 收稿日期:2006-09-18 修回日期:2007-06-07 出版日期:2007-10-30 发布日期:2007-10-30
  • 通讯作者: 王竞

A Multi-Carrier System Based on Maximum Likelihood Sequence Detection in Frequency Domain

WANG Jing1, LI Dao-ben1   

  1. ( School of Information Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China)
  • Received:2006-09-18 Revised:2007-06-07 Online:2007-10-30 Published:2007-10-30
  • Contact: WANG Jing

摘要:

提出了一种新颖的非正交多载波系统——MLSD-MCM,该系统不需要循环前缀的保护,频谱效率优于相同调制方式的OFDM系统.信号检测采用了基于Ungerboeck尺度的频率域最大似然序列检测(MLSD).为了降低复杂度,应用了平方根汉宁窗,子载波之间的等效卷积约束长度可近似为2.计算机仿真结果证明,MLSD-MCM系统在移动信道下是有效可行的.

关键词: 非正交频分复用, 最大似然序列检测, 无线通信

Abstract:

A new non-orthogonal multi-carrier system is proposed. The CP-free system shows that its spectrum efficiency is better than that of the OFDM system with the same modulation. The frequency-domain maximum likelihood sequence detection based on the Ungerboeck metric is employed. In order to decrease the detection complexity, a square-root-Hanning window is adopted. The convolution constraint length among sub-carriers is only 2. The simulation results prove that the proposed system is effective and feasible in mobile channels.

Key words: non-orthogonal frequency division multiplexing, maximum likelihood sequence detection, wireless communications

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