一种基于信噪比的动态门限协作感知方法  

Dynamic Threshold Cooperative Sensing Method Based on SNR

作　　者：郭加贝[1] 章坚武[1] 

机构地区：[1]杭州电子科技大学通信工程学院,杭州310018

出　　处：《计算机工程》2012年第3期91-92,96,共3页Computer Engineering

摘　　要：在协作频谱检测中,针对单用户进行信号检测时所处环境的不同会对联合检测性能产生很大影响。为此,根据认知节点不同的信噪比,提出一种可以动态调整判决门限的协作检测方法。仿真结果表明,在联合虚警概率一定的情况下,该方法可明显提高联合检测概率及频谱检测的可靠性。In cooperative frequency spectrum sensing, signal detection for single user will influence united detection performance a lot because of different environment. Aiming at the problem, according to the Signal-to-noise Ratio（SNR） of cognitive node, this paper proposes a new cooperative sensing method, which can dynamically adjust threshold. Simulation results illustrate that in the same false alarm probability, the method can significantly improve the united detection probability and reliability of frequency spectrum detection.

关 键 词：认知无线电 协作频谱感知 信噪比 门限调整 联合检测 虚警概率 

分 类 号：TN911.7[电子电信—通信与信息系统]