异构无线网络的认知节点位置分析

摘要

针对异构无线网络的协同频谱感知的检测能力问题,提出了一种基于信号相关特性的协同判决策略,采用环状对称的认知节点预布置方法来提高预定区域内主用户的检测能力.通过对称布置认知节点对之间的协同检测来减少隐藏终端误判概率,解决双工状态的主用户检测问题并实现对处于接收状态的异构网络主用户的非协议解析.数值仿真验证了该认知节点预布置方法能提高检测概率,在保证主用户不被干扰的同时使认知用户对空闲频谱的接入机会最大化.%Aiming at the problem of the capacity of cooperative detection heterogeneous wireless networks, a cooperative decision strategy based on signal correlation is proposed and a cyclic symmetry pre-arrangement method is designed to improve the detection capability for primary users in determined area. The method can not only decreases the false detection probability of hidden terminals, but also achieves the detection of duplex status of primary users in heterogeneous wireless networks based on non-protocol analysis. The simulation results show that the pre-arrangement method of cognitive users improves the detection capability for primary user, and maximizes the opportunity of cognitive users to access the unused spectrum while preventing interference to the primary user.