基于动态门限的频谱感知算法研究  

Research on Spectrum Sensing Algorithm Based on Dynamic Threshold

作　　者：郝博雅[1] 马传焱[1] 时荔蕙[1] 王春龙[1] HAO Bo-ya MA Chuan-yan SHI Li-hui WANG Chun-long(Unit 63961, PLA, Beijing 100012, China)

机构地区：[1]中国人民解放军63961部队

出　　处：《无线电工程》2017年第2期23-27,共5页Radio Engineering

基　　金：国家高技术研究发展计划("863"计划)基金资助项目(2013AA122105)

摘　　要：认知无线电能量检测算法在实际工程应用中非常广泛,但是该算法的主要缺点是判决门限难,很难在同时兼顾虚警概率和漏警概率的情况下对门限进行设置。因此,在能量检测算法的基础上,针对噪声平均功率存在波动性这一现状,提出了一种基于动态门限的频谱感知算法。仿真结果表明,该算法能够同时兼顾虚警概率和漏警概率,始终保证整体的频谱检测差错概率最小,具有可行性。The energy detection algorithm of cognitive radio is widely used in the practical engineering application, but its major defect is difficult threshold judgement,and it is difficult to set the threshold while taking into account the false alarm probability and leakage alarm probability.Based on the energy detection algorithm,this paper proposes a spectrum sensing algorithm based on dynamic threshold in view of the current situation of noise average power.The simulation results show that the proposed algorithm can always minimize the error probability of overall spectrum detection while taking into account the false alarm probability and leakage alarm probability at the same time, so it is feasible.

关 键 词：认知无线电 能量检测 动态门限 

分 类 号：TN98[电子电信—信息与通信工程]