宽频信号能量检测最优判决门限  

Optimal Decision Threshold for Energy Detection Based Broadband

作　　者：刘雯雯[1] 袁龙[1] 刘子扬[1] 彭涛[1] 王文博[1] 

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876

出　　处：《北京邮电大学学报》2014年第1期25-30,共6页Journal of Beijing University of Posts and Telecommunications

基　　金：国家科技重大专项项目(2012ZX03003011;2012ZX03003007;2013ZX03003012);国家重点基础研究发展计划项目(2012CB316005);国家自然科学基金-广东联合基金项目(U1035001)

摘　　要：针对宽频带信号能量检测的性能主要受到虚警概率和漏检概率的影响,提出从其判决门限的选取入手,对一定频谱环境下的检测算法性能是否可以达到指标要求做出分析,研究了门限设置对虚警概率和漏检概率的影响.通过数学推导得到了宽频带信号能量检测最小代价门限的闭式解,并给出了其最优判决门限的选取准则,即根据不同的时域观测时长选取不同的判决门限.仿真结果验证了所提出结论的正确性.An optimal decision threshold for energy detection based broadband is presented. Upon the analysis and research on whether the certain performance spectrum detection algorithm can achieve the target requirements, it is concluded that the threshold settings depended on the impact of false alarm probability and the probability of missing detection. Through mathematical derivation, the closed-formso- lution of the minimum-cost decision threshold is dedueed, and then the selection criterion of the optimal detection threshold is proposed in which the detection threshold selection is upon the length of observation time in domain. Simulation results verify the correctness of the article.

关 键 词：最优判决门限 观测时长 能量检测 

分 类 号：TN929.53[电子电信—通信与信息系统]