北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2012, Vol. 35 ›› Issue (5): 31-35.doi: 10.13190/jbupt.201205.31.liuzy

• 论文 • 上一篇    下一篇

干扰系统先验信息未知的宽带能量检测

刘子扬, 彭 涛, 郭海波, 王文博   

  1. 1. 泛网无线通信教育部重点实验室(北京邮电大学)2. 国家知识产权局专利局专利审查协作北京中心通信审查部
  • 收稿日期:2012-02-15 修回日期:2012-05-18 出版日期:2012-10-28 发布日期:2012-07-06
  • 通讯作者: 刘子扬 E-mail:liuziyang243@gmail.com
  • 作者简介:刘子扬(1985-),男,博士生,Email:liuziyang243@gmail.com 王文博(1965-),男,教授,博士生导师
  • 基金资助:

    国家科技重大专项项目(2012ZX03003011,2012ZX03003007);国家重点基础研究发展计划项目(2012CB316005);诺基亚、国家自然科学基金-广东联合基金项目(U1035001)

Energy Detection about Broadband Signal without Priori Information of Interference System

LIU Zi-yang, PENG Tao, GUO Hai-bo, WANG Wen-bo   

  1. 1. Key Laboratory of Universal Wireless Communication(Beijing University of Posts and Telecommunications), Ministry of Education2. Communication Examination Division, Patent Examination Cooperation Center of the Patent Office, State Intellectual Property Office
  • Received:2012-02-15 Revised:2012-05-18 Online:2012-10-28 Published:2012-07-06
  • Contact: Liu Ziyang E-mail:liuziyang243@gmail.com

摘要:

为了使感知无线电在宽带频谱中对干扰系统先验信息未知的信号进行能量检测时获得更好的检测性能,建立了一个基于采样的宽带频谱模型并且推导出了基于最小错判率准则的判决门限闭式解.仿真结果表明,在宽带信号能量检测中采用最小错判率准则比使用传统窄带信号能量检测判决准则能在干扰系统先验信息未知的情况下获得更好的信号检测性能.

关键词: 感知无线电, 能量检测, 宽带, 最佳门限

Abstract:

In order to improve the performance of energy detection on broadband signals without priori information of interference system, a broadband spectrum model based on sampling is set up, and the closed-form of the decision threshold based on the minimum-error-rate criteria is derived. Simulation shows that the minimum error rate detection outperforms traditional narrowband signal detection in broadband scenario in absence of priori information.

Key words: cognitive radio, energy detection, broadband, optimal threshold

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