北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2015, Vol. 38 ›› Issue (2): 83-88.doi: 10.13190/j.jbupt.2015.02.015

• 论文 • 上一篇    下一篇

基于GBIC准则的认知无线电宽带频谱感知

申滨, 王平玉, 程克非, 陈前斌   

  1. 重庆邮电大学 移动通信技术重点实验室, 重庆 400065
  • 收稿日期:2014-06-30 出版日期:2015-04-28 发布日期:2015-05-14
  • 作者简介:申 滨(1978—), 男, 教授, 硕士生导师, E-mail: shenbin@cqupt.edu.cn.
  • 基金资助:

    国家自然科学基金项目(61201205,61379195); 重庆市自然科学基金项目(CSTC2012JJA40043)

GBIC Based Wideband Spectrum Sensing in Cognitive Radio

SHEN Bin, WANG Ping-yu, CHENG Ke-fei, CHEN Qian-bin   

  1. Key Laboratory of Mobile Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
  • Received:2014-06-30 Online:2015-04-28 Published:2015-05-14

摘要:

提出了基于广义贝叶斯信息准则(GBIC)的认知无线电宽带频谱感知算法. 该方案主要是利用GBIC准则估算出宽带授权频带中被主用户占用子带的个数,并确定其在宽带频段上的相应位置,从而完成宽带感知频段上的空闲频段定位以便于次级用户动态接入. 理论分析和仿真结果表明,所提出的GBIC准则宽带频谱感知方案对先验信息的依赖程度低,可以有效地提高频谱感知性能,其性能十分接近传统的能量感知方案.

关键词: 认知无线电, 宽带频谱感知, 广义贝叶斯信息准则

Abstract:

A generalized Bayesian information criterion (GBIC) based wideband spectrum sensing scheme was proposed for cognitive radios. The proposed algorithm first estimates the number of subbands occupied by primary users in the licensed frequency band under the GBIC mechanism. Subsequently, their positions in the wide spectrum are identified. In this way, the idle subbands can be dynamically accessed by the secondary users. Simulations illustrate that the proposed wideband sensing scheme of GBIC, is capable of significantly improving the spectrum sensing performance and very close to the conventional energy detection scheme.

Key words: cognitive radio, wideband sensing, generalized Bayesian information criterion

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