认知无线电系统中授权频段机会可用价值研究  

Research on opportunistic utilization quality of licensed bands for cognitive radio systems

作　　者：李夏林[1,2] 王贵竹[1] 胡宏林 易辉跃 

机构地区：[1]安徽大学计算智能与信号处理教育部重点实验室,合肥230039 [2]上海无线通信研究中心,上海200335

出　　处：《计算机工程与应用》2011年第13期116-119,共4页Computer Engineering and Applications

基　　金：国家高技术研究发展计划(863)No.2009AA011800;上海市自然科学基金项目(No.08ZR1418500)~~

摘　　要：认知无线电技术能利用暂时空闲的授权频段,被认为是解决当前无线电频谱资源稀缺的有效技术。为提高搜索授权频段的效率,提出了一种简单而有效的方法。此种方法,根据认知无线电系统业务模型确定可用授权频段的加权系数,联合授权频段的占用状况来计算授权频段的机会可用价值。授权信道的可用价值反映了信道为认知无线电系统提供空白频谱的能力。Cognitive Radio（CR） technology has been proposed as promising solutions to implement efficient reuse of the li-censed spectrum by opportunistically utilizing the white space of licensed spectrum bands.In order to improve the search andutilization efficiency of licensed bands,a simple and effective method is proposed.The proposed method firstly determinesthe weighted coefficients of the available spectrum bands according to the traffic model of CR systems,and then calculatesthe opportunistic utilization quality of licensed bands by considering the occupancy state of licensed bands.Opportunity utiliza-tion quality of licensed bands indicates its capability to provide the available white space for CR systems

关 键 词：认知无线电 授权频段 频谱占用 能量感知与检测算法 机会可用价值 

分 类 号：TN911.7[电子电信—通信与信息系统]