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应用科学学报 ›› 2011, Vol. 29 ›› Issue (1): 27-32.doi: 10.3969/j.issn.0255-8297.2011.01.005

• 通信工程 • 上一篇    下一篇

STBC协同OFDM系统快速迭代ICI消除的信干比计算

 彭章友1;2， 刘艳艳1;2， 张兴1;2   

  1. 1．上海大学通信与信息工程学院，上海200072
    2. 上海大学特种光纤与光接入网省部共建重点实验室，上海200072
  • 收稿日期:2010-07-14 修回日期:2010-10-25 出版日期:2011-01-26 发布日期:2011-01-25
  • 通信作者: 彭章友，博士，副教授，研究方向：宽带无线通信技术、通信信号处理，E-mail: zypeng@mail.shu.edu.cn
  • 作者简介:彭章友，博士，副教授，研究方向：宽带无线通信技术、通信信号处理，E-mail: zypeng@mail.shu.edu.cn
  • 基金资助:

    国家自然科学基金(No.61071109)；上海市教委创新基金(No.11YZ02)；上海市重点学科和科委重点实验室项目基金(No.S30108,
    No.08DZ2231100)资助

SIR Calculation for Fast Iterative ICI Cancellation in STBC Cooperative OFDM System

PENG Zhang-you1;2, LIU Yan-yan1;2, ZHANG Xing1;2   

  1. 1. School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China
    2. Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University,
    Shanghai 200072, China
  • Received:2010-07-14 Revised:2010-10-25 Online:2011-01-26 Published:2011-01-25
  • About author:彭章友，博士，副教授，研究方向：宽带无线通信技术、通信信号处理，E-mail: zypeng@mail.shu.edu.cn

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摘要：

 针对空时分组编码的协同正交频分复用系统，提出了快速迭代消除子载波干扰的信干比计算方法. 该方法用每次迭代的初始值代替发送信号，实现接收信号信干比的计算，对于相对频偏较大的情况，可结合频偏补偿方法进行计算. 误差分析和仿真数据表明：信噪比大于10 dB 时，采用这种方法计算信干比与理论信干比的相对误差小于10?2.

关键词: 空时分组编码, 正交频分复用, 子载波间干扰, 信干比

Abstract:

 Based on the space time block coding (STBC) cooperative orthogonal frequency division multiplexing (OFDM) system, a method for calculating signal-to-interference ratio (SIR) is proposed to cancel inter-carrier interference (ICI) iteratively. By using the initial value of each iteration step instead of the transmitted signal, the method can calculate SIR of the received signal. For large frequency offset, a frequency compensation scheme is used. Error analysis and simulation results show that, when SIR is above 10 dB, difference between the SIR obtained with the proposed method and the theoretical results is below 10?2.

Key words:  space time block coding (STBC), orthogonal frequency division multiplexing (OFDM), intercarrier interference (ICI), signal-to-interference ratio (SIR)

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