面向认知无线电的干扰频点鲁棒检测方法  

A Robust Detection Method of Jamming Frequency in Cognitive Radio

作　　者：王正欢 杨亚宁 帅云开 Wang Zhenghuan;Yang Yaning;Shuai Yunkai(Beijing Mechanical&Electrical Engineering General Design Department,Beijing 100854,China)

机构地区：[1]北京机电工程总体设计部,北京100854

出　　处：《遥测遥控》2018年第6期40-45,共6页Journal of Telemetry,Tracking and Command

基　　金：国防基础科研计划

摘　　要：在军事认知无线电中,频谱感知的重要作用是检测干扰信号频点。传统的干扰频点检测方法利用周期图法估计信号频谱,然后将谱估计与阈值比较以确定干扰频点,这种检测方法由于周期图法估计方差大而存在鲁棒性差的缺点。提出一种干扰频点鲁棒检测方法,使用改进的周期图法来估计接收信号频谱,然后使用前向连续均值消除(FCME)方法检测干扰频点。文中还推导了该方法的检测阈值公式和检测概率公式,并仿真分析了该方法在部分频带干扰下的检测性能。仿真结果验证了该方法的有效性。In military cognitive radio,the primary purpose of spectrum sensing is to detect the jamming frequency.Conventional jamming frequency detection methods utilize periodogram to estimate the spectrum of the received signal and compare the estimated spectrum with a certain threshold to locate the jamming frequency.These methods lack in robustness due to the large variance of periodogram.In this paper we propose a robust detection method of jamming frequency,which exploits improved periodogram to estimate the spectrum of the received signal and subsequently uses forward consecutive mean excision(FCME)to detect the jamming frequency.We also derive the mathematical expressions of the detection threshold and the detection probability.Finally we simulate the performance of the proposed method in the presence of partial band noise.The simulation results validate the effectiveness of the proposed method.

关 键 词：干扰频点检测 鲁棒检测 WELCH法 FCME 检测阈值 

分 类 号：TN975[电子电信—信号与信息处理]