认知无线电网络中频谱空穴利用率的优化策略  

Optimization strategy of spectrum hole utilization efficiency in cognitive radio networks

作　　者：崔微微[1] 贾晓剑[1] 杜娟[2] 

机构地区：[1]河南科技学院信息工程学院,河南新乡453003 [2]南阳理工学院,河南南阳473000

出　　处：《河南科技学院学报（自然科学版）》2018年第6期58-64,68,共8页Journal of Henan Institute of Science and Technology(Natural Science Edition)

摘　　要：认知无线电技术允许认知用户动态利用频谱空穴,从而提高频谱利用率.授权用户的活跃度、感知时间的大小、是否采用协作感知、认知用户接收信噪比和数据传输时延均影响频谱空穴利用率.建立了频谱空穴利用率的数学模型,目的是在保护授权用户权益的前提下分析各种参数对频谱空穴利用率的影响,并进行了计算机仿真.仿真结果及分析表明:为了提高频谱空穴利用率,认知用户可采取协作感知,采用最优感知时间和提高数据传输速率的方法;授权用户可采取提高信号功率的方法.The cognitive radio which is designed for cognitive users to dynamically access to the spectrum hole improves spectrum utilization efficiency.The spectrum hole utilization efficiency is affected by the activity of primary users,the sensing time,the cooperative sensing,the SNR received by cognitive users and the delay of data transmission.In this paper,the mathematical model was formulated to analyze the influence of various parameters on spectrum hole utilization efficiency subject to sufficient protection that was provided to the primary user.And correlative computer simulations were carried out.The analysis and simulation results showed that:cognitive users can adopt the method of cooperative sensing,optimal sensing time and improving data transmission rate to improve spectrum hole utilization efficiency.And primary users can increase signal power.

关 键 词：认知无线电 频谱空穴利用率 协作感知 

分 类 号：TN925[电子电信—通信与信息系统]