基于主用户协作场景下认知用户频谱检测性能分析  

Spectral detection performance analysis for the cognitive user based on primary user cooperation scenario

作　　者：赵建立[1] 苑津莎[1] 韩东升[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2014年第1期106-112,共7页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家自然科学基金资助项目(61302106)

摘　　要：考虑协作通信网络和认知无线网络共存的场景,分析了主用户具有中继辅助的情况下,认知用户的频谱检测性能。通过理论分析,得到了认知用户的理论检测概率和虚警概率;同时分析了基于中继采用放大-转发传输模式下,认知用户的检测性能,并将最佳感知时间建模成一个优化问题,从而得到认知用户可以获得的检测时间增益。通过仿真比较了传统检测模型和新型模型的检测结果。仿真表明,理论分析和实际仿真吻合,验证了理论分析的正确性,为今后该模型的研究奠定了理论基础。This paper jointly considers cooperative communication （CC） and cognitive radio （CR） in the same scenar- io. We proposed the new detection model that the primary user （ PU ） in terms of cooperative transmission with the help of relay in cognitive radio networks. The probabilities of detection and false alarm were obtained during analyses. In ad- dition, considering the relay based on amplifies and forward cooperative transmission model, we analyzed the detection performance, and the optimum detection time of SU was modeled as an optimization problem. The sensing time gain for secondary user （SU） was achieved as a result. We compared the detection performance between the traditional and the new model proposed through simulations. The simulation results show that the practical simulations and theoretical anal- ysis match very well. Thus it indicates the correctness of the method. All this paper researches lay foundations for fur- ther theoretical researches of this new model.

关 键 词：认知无线电 协作通信 中继 检测概率 最佳检测时间 

分 类 号：TP393.04[自动化与计算机技术—计算机应用技术]