基于序贯合作检测的认知无线电系统吞吐量优化  

Throughput optimization of cognitive radio networks based on sequential cooperative sensing

作　　者：张雯[1] 杨家玮[1] 闫琦[1] 肖丽媛[1] 

机构地区：[1]西安电子科技大学综合业务网理论及关键技术国家重点实验室信科所,陕西西安710071

出　　处：《通信学报》2010年第S1期148-153,共6页Journal on Communications

基　　金：国家重点基础研究发展计划("973"计划)基金资助项目(2009CB320404);国家自然科学基金资助项目(60902032;60902033);国家重点实验室专项基金资助项目(ISN02080001)~~

摘　　要：研究了认知无线电系统中,在主用户得到充分保护的条件下,采用序贯合作检测时系统吞吐量的优化问题。建立了系统吞吐量最优化的数学模型,并采用最优化理论对其进行分析,给出了最大吞吐量及其对应的最优参数的搜索方法。仿真结果表明,基于序贯合作检测的认知无线电系统存在最大吞吐量,且最大吞吐量随着传输开销的增大而减小。Under the constraint that the primary users were sufficiently protected,throughput optimization problem was studied in cognitive radio networks based on sequential cooperative spectrum sensing.Throughput optimization problem was established,and was analyzed by optimization theory.Furthermore,a searching method was proposed to obtain the optimal throughput and the corresponding optimal parameters.The simulation results show that the optimal throughput exists in the cognitive radio networks based on sequential cooperative sensing,and the optimal throughput decreases as the transmission overhead increases.

关 键 词：认知无线电 频谱检测 序贯检测 检测时间 吞吐量 

分 类 号：TN925[电子电信—通信与信息系统]