通信学报 ›› 2014, Vol. 35 ›› Issue (3): 168-173.doi: 10.3969/j.issn.1000-436x.2014.03.019

• 学术论文 • 上一篇    下一篇

基于DS证据理论的协作频谱感知改进方法

于美婷,赵林靖,李钊   

  1. 西安电子科技大学 ISN国家重点实验室,陕西 西安 710071
  • 出版日期:2014-03-25 发布日期:2017-08-17
  • 基金资助:
    国家自然科学基金资助项目;国家自然科学基金资助项目;国家科技重大专项基金资助项目;高校科研基本业务费基金资助项目;长江学者和创新团队发展计划基金资助项目;高等学校创新引智计划基金资助项目

Improved cooperative spectrum sensing scheme based on dempster-shafer theory in cognitive radio network

Mei-ting YU,Lin-jing ZHAO,Zhao LI   

  1. State Key Laboratory of Integrated Service Networks,Xidian University,Xi'an 710071,China
  • Online:2014-03-25 Published:2017-08-17
  • Supported by:
    The National Natural Science Foundation of China;The National Natural Science Foundation of China;National S&T Major Project;Fundamental Research Funds for the Central Universities;Program for Changjiang Scholars and Innovative Research Team in University;The 111 Project

摘要:

提出了一种新的协作频谱感知方法,该方法采用DS证据理论。首先,在本地感知通过投影近似法分解感知结果以减少次级用户上报至融合中心的感知数据,从而降低协作带宽开销。其次,在融合中心根据次级用户证据矢量之间的距离计算可信度,以可信度为权重对每个次级用户的基本概率分配进行加权平均来减小高度冲突数据对检测性能的影响。仿真结果表明,该方法减少了协作感知的带宽开销,改善了数据高度冲突时的检测性能。

关键词: 协作频谱感知, 数据融合, DS证据理论, 证据高度冲突

Abstract:

An improved cooperative spectrum sensing scheme based on dempster-shafer evidence theory in cognitive radio networks was proposed.In the local sensing period,the projection approximation algorithm was introduced to reduce bandwidth for cooperation.In the fusion period,credibility was calculated by the distance between evidence vectors of different secondary users and adopted as the weights to combine different local sensing data.The new scheme reduces channel bandwidth and simulation results show that the new scheme improves the performance under the condition of high level conflict.

Key words: cooperative spectrum sensing, data fusion, dempster-shafer theory of evidence, high level conflict

No Suggested Reading articles found!