基于信任度的可变门限能量检测算法  

Variable threshold energy detection algorithm based on trust degree

作　　者：肖洁 陈跃斌[1] 陈楚天 郑婷 钱继武 XIAO Jie;CHEN Yuebin;CHEN Chutian;ZHENG Ting;QIAN Jiwu(School of Electrical and Information Technology,Yunnan Minzu University,Ktmming 650500,China)

机构地区：[1]云南民族大学电气信息工程学院,云南昆明650500

出　　处：《电信科学》2018年第8期129-135,共7页Telecommunications Science

基　　金：国家自然科学基金资助项目(No.61261022);云南民族大学创新团队项目~~

摘　　要：针对随机的概率式频谱感知数据篡改(spectrum sensing data falsification,SSDF)攻击,提出基于信任度的可变门限能量检测算法。首先比较实际融合值与融合中心上、下边界值的关系,更新可变门限,且通过系统给定的虚警概率和漏检概率确定上、下边界值;其次采用基于正确感知次数和总感知次数比值确定信任值的软融合方法。仿真结果表明,与传统固定门限相比,算法抵御攻击的同时不仅能够降低虚警概率和漏检概率,同时可以提高系统检测概率。Aiming at stochastic probabilistic SSDF attacks, a variable threshold energy detection algorithm based on trust degree was proposed. Firstly, the variable threshold was updated by comparing the actual fusion value with the upper and lower boundary values of the fusion center. The upper and lower boundary values were determined through the given false alarm probability and missed probability. Secondly, a soft fusion method was used based on the ratio of correct perception times and the total number of times to update the trust value. Simulation results show that, compared with the traditional fixed threshold, the proposed algorithm can not only reduce the false alarm and missed detection probability, but also improve the detection probability of the system.

关 键 词：认知无线电 能量检测 概率式SSDF攻击 可变门限 

分 类 号：TN925[电子电信—通信与信息系统]