有限用户数下认知无线电接入模型和性能分析  

A Cognitive Radio Access Model and Performance Analysis with Finite User Population

作　　者：冯文江[1] 夏育才[1] 蒋卫恒[1] 

机构地区：[1]重庆大学通信工程学院,重庆400030

出　　处：《北京邮电大学学报》2011年第2期118-121,135,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(60872038);国家211工程创新人才培养计划项目(S-09102)

摘　　要：采用连续马尔可夫模型对有限数认知用户的接入进行建模,针对主用户数和认知用户数的变化,分析了认知用户占用授权信道的阻塞概率、强迫终止概率和信道中认知用户的平均数.仿真结果表明,随着主用户数和认知用户数的增加,认知用户阻塞概率和强迫终止概率增大,但主用户信道中认知用户数的平均数随主用户数的增加而减少,随认知用户数的增加而增大.The continuous Markov model is used to model the access process of cognitive users with finite population. In connection with the variability of the number of primary users and cognitive users, the blocking probability, the forced termination probability and the average numbers in channels of cognitive users are analyzed while cognitive users try to occupy the licensed channels. Simulation results show that the blocking probability and the forced termination probability of cognitive users will climb up with the increase of the number of primary users or cognitive users while the average numbers of cognitive users in licensed channels will reduce with the increase of numbers of primary users and grow up with the increase of numbers of cognitive users separately.

关 键 词：认知无线电 有限用户数 接入模型 连续马尔可夫模型 

分 类 号：TN929.5[电子电信—通信与信息系统]