北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2013, Vol. 36 ›› Issue (4): 59-64.doi: 10.13190/jbupt.201304.56.limzh

• 论文 • 上一篇    下一篇

非正交转发协议下新的信号检测方法

李民政1, 欧阳缮1,2, 陈紫强1, 肖海林2   

  1. 1. 西安电子科技大学 电子工程学院, 西安 710071;
    2. 桂林电子科技大学 信息与通信学院, 广西 桂林 541004
  • 收稿日期:2012-11-24 出版日期:2013-08-31 发布日期:2013-05-22
  • 作者简介:李民政(1972—),男,博士生,E-mail:minzhengli@126.com;欧阳缮(1960—),男,教授,博士生导师.
  • 基金资助:

    国家自然科学基金项目(61261032,61261018);广西自然科学基金项目(2013GXNSFFA019004,2011GXNSFD018028)

A Novel Signal Detection Method in Application to Non-orthogonal Forward Protocol

LI Min-zheng1, OUYANG Shan1,2, CHEN Zi-qiang1, XIAO Hai-lin2   

  1. 1. School of Electronic Engineering, Xidian University, Xi'an 710071, China;
    2. School of Information and Communication, Guilin University of Electronic Technology, Guangxi Guilin 541004, China
  • Received:2012-11-24 Online:2013-08-31 Published:2013-05-22

摘要:

针对非正交转发协议中联合似然检测时间复杂度较高、检测性能较差的问题,提出一种新的检测方法. 该方法以最大比合并方式使强信号帧获得分集增益并先行检测,然后以检测值消除对弱信号帧的干扰,最后检测消除干扰后的弱信号帧. 理论分析和仿真结果表明,相对联合似然检测,所提出的检测方法不仅能有效降低检测时间复杂度,而且检测性能也明显改善;该方法的误比特性能理论与仿真值在高信噪比时趋于一致.

关键词: 非正交转发, 干扰消除, 最大比合并, 联合最大似然检测

Abstract:

The joint maximum likelihood detection (JMLD) in application to non-orthogonal forwarding protocol has higher detection time complexity and poorer detection performance. A new detection method is proposed. The diversity gain of strong signal frame is obtained by maximal ratio combining and detected in advance. The detection result is thereafter used to eliminate interference to weak signal frame. At last, the weak signal frame is detected. Analysis and simulation show that, comparing with JMLD, the proposed method reduces the detection time complexity effectively and improves the bit error performance. The bit error rate of analysis and simulation value tends to be consistent at high signal-to-noise ratio.

Key words: non-orthogonal forward protocol, interference cancellation, maximal ratio combine, joint maximum likelihood detection

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