北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2010, Vol. 33 ›› Issue (4): 114-117.doi: 10.13190/jbupt.201004.114.sunjf

• 研究报告 • 上一篇    下一篇

合作感知系统中最优合并准则下的用户删除方法

孙剑锋1,2,高锦春1,2,刘元安1,2,谢刚1,3   

  1. 1泛网无线通信教育部重点实验室(北京邮电大学); 2北京邮电大学 电子工程学院;  3北京邮电大学 信息与通信工程学院
  • 收稿日期:2009-06-08 修回日期:2009-10-22 出版日期:2010-08-28 发布日期:2010-05-21
  • 通讯作者: 孙剑锋 E-mail:darsinx@126.com
  • 基金资助:

    中瑞国际IMT-Advanced合作项目(2008DFA11780);国家自然科学基金资助项目60802033、60873190;国家“863”计划 (2008AA01Z211);国家级.国家自然科学基金重大研究计划项目

User Reject Algorithm Based Optimal Fusion  Rule in Cooperative Sensing System

  • Received:2009-06-08 Revised:2009-10-22 Online:2010-08-28 Published:2010-05-21

摘要:

在IEEE802.22标准系统模型下分析了最优合并准则的性能及影响因素. 在此基础上提出了用户删除的方法:通过设置门限去除对最终判决影响较小的用户,从而大幅减少了合作感知的反馈信息,有效节省了反馈信道资源. 理论分析和仿真结果显示,用户删除通过设置合理的门限可有效控制系统的性能损失,同时降低反馈信道资源需求,为进一步的系统优化打下了基础.

关键词: 认知无线电, 合作感知, 最优合并准则, 用户删除

Abstract:

Cooperative sensing can effectively improve the performance in cognitive systems, and the main benefit comes from some high reliable users but not all users. The performance of the optimal fusion rule is analyzed under the system model of IEEE 802.22. Based on the analysis, a new user rejection algorithm is proposed to reduce feedback resource greatly with limited performance loss. The proposed sets a threshold to reject users with low reliability. Analysis and simulation show that the user rejection can effectively control the system performance loss by setting a reasonable threshold. Moreover, it also reduces the requirements of feedback channel resources and provides a foundation for further cooperation sensing system optimization.

Key words: cognitive radio, cooperative sensing, optimal fusion rule, user reject