计算机科学 ›› 2018, Vol. 45 ›› Issue (6A): 266-269.

• 网络与通信 • 上一篇    下一篇

一种新型的能量检测方法及性能分析

曹开田1,2,杭燚灵2   

  1. 南京邮电大学宽带无线通信与传感网技术教育部重点实验室 南京2100031
    南京邮电大学通信与信息工程学院 南京2100032
  • 出版日期:2018-06-20 发布日期:2018-08-03
  • 作者简介:曹开田(1978-),男,博士,副教授,主要研究方向为无线通信与网络信号处理、机器学习理论等,E-mail:xckt007@163.com(通信作者);杭燚灵(1993-),女,硕士生,主要研究方向为无线通信与网络信号处理,E-mail:hangyiling00@163.com。
  • 基金资助:
    国家自然科学基金(61671252,61201161,61571233)资助

Novel Energy Detection Method and Detection Performance Analysis

CAO Kai-tian1,2,HANG Yi-ling2   

  1. Key Lab of Broadband Wireless Communication and Sensor Network Technology,Ministry of Education, Nanjing University of Posts and Telecommunications,Nanjing 210003,China1
    College of Telecommunications and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China2
  • Online:2018-06-20 Published:2018-08-03

摘要: 针对当前小样本情况下的能量检测(Energy Detection,ED)方法只对AWGN(Additive White Gaussian Noise)非衰落信道上的检测性能进行了近似分析的不足,利用广义Marcum Q函数的最新研究成果对小样本条件下的ED方法进行研究,推导出在瑞利衰落信道下易处理的、精确的ED检测概率闭式解表达式,并对其检测性能进行了分析。理论分析和仿真结果表明,与目前采用中心极限定理(Central Limit Theorem,CLT)、多维高斯(Cube-of-Gaus-sian,CoG)近似法及其他近似法分析ED检测性能相比,所提方法在小样本情况下具有更稳定、更精确的检测性能。

关键词: Meijer’s G函数, 检测性能, 能量检测, 频谱感知, 认知无线电

Abstract: In order to overcome the disadvantage that the existing small sample size-based energy detection (ED) me-thods only obtain the approximations of detection performance of ED in AWGN (Additive White Gaussian Noise),a more tractable and more accurate closed-form expression for detection probability of ED in Rayleigh fading channel was derived and its performance was analyzed by exploiting the latest research result of generalized Marcum Q-function in this paper.Both theoretical analysis and simulation results show that compared with the approximate analysis of ED detection performance such as the CLT (Central Limit Theorem)-based approach,the CoG (Cube-of-Gaussian)-based me-thod and other approximations,the proposed scheme has more robust and accurate detection performance.

Key words: Cognitive radio, Detection performance, Energy detection, Meijer’s G function, Spectrum sensing

中图分类号: 

  • TN301
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