基于传输中断概率的认知无线电系统性能分析  

Performance Analysis of Cognitive Radio System Based on Outage Probability of Cognitive Transmission

作　　者：高昊民 赵海峰[1] 梁晓[1] 穆晓敏[1] 

机构地区：[1]郑州大学信息工程学院,郑州450001

出　　处：《电信科学》2013年第10期114-118,130,共6页Telecommunications Science

基　　金：国家自然科学基金资助项目(No.61271421);教育部新世纪优秀人才基金资助项目(No.NCET-12-0699);河南省重大科技攻关基金资助项目(No.112102210507)

摘　　要：如何设计最优的频谱感知与传输框架是认知无线电技术的重要环节。考虑频谱接入过程中数据传输中断对认知网络性能影响的问题,提出了一种新的基于传输中断概率的频谱感知与传输模型,联合优化频谱感知和数据传输两个阶段,将问题建模为对主用户的干扰量约束条件下的非凸优问题,以最大化认知网络吞吐量为目标联合优化感知时间、传输速率,并通过数值计算方法对其进行求解与仿真。数值分析表明,引入传输中断概率后,在满足上述约束条件的同时,在保护主用户和认知网络吞吐量、传输时延之间有了更好的权衡。It is an important part to design an optimal spectrum sensing and transmission framework in cognitive radio network.Considering that cognitive data transmission outage had effect on the performance of cognitive radio system,a novel spectrum sensing and transmission model based on the outage probability of cognitive transmission was proposed and the two phases of spectrum sensing and data transmission were jointly optimized.The model was formulated as a nonconvex optimization problem under the constraint of interference to primary user,which maximized the average achievable throughput by the joint optimization of sensing time and data transmission rate and simulated by means of the numerical method.The numerical analysis shows that a better tradeoff can be achieved among the protection of primary user,the throughput of cognitive system and transmission delay when the outage probability is cited and the constraint is satisfied.

关 键 词：认知无线电 频谱感知 数据传输 传输中断概率 吞吐量 

分 类 号：TN929.533[电子电信—通信与信息系统]