认知无线电中OFDM协作频谱感知技术及其优化  

Optimization of Cooperative Spectrum Sensing Based on OFDM for Cognitive Radio Networks

作　　者：李映雪[1] 钟士元[1] 雷静[2] 黄春明[1] 姚诸香[2] 

机构地区：[1]国网江西省电力公司经济技术研究院,南昌330043 [2]国网江西省电力公司,南昌330077

出　　处：《北京邮电大学学报》2015年第5期96-98,103,共4页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(60672132)

摘　　要：利用正交频分复用信号包含循环前缀的特点,提出一种针对该信号的多用户场景下的协作检测模型,用最大化偏移系数的方法对系统的权值向量进行优化,得到优化权值向量的闭合表达式.理论分析和仿真结果均表明,所提算法检测性能优于经典协作检测算法.Utilizing the cyclic prefix characteristic of orthogonal frequency division multiplexing（ OFDM）signal,this paper optimizes the system weight vector with the improved maximum deflection coefficient,proposes a multiuser cooperation detection algorithm,and obtains optimized weight vector expression.Theoretical analysis and simulation results demonstrate the remarkable improvement of proposed algorithm on detection performance compared with the classical cooperation detection algorithm.

关 键 词：循环前缀 协作检测 正交频分复用 偏移系数 性能优化 

分 类 号：TN929.53[电子电信—通信与信息系统]