Improved spectrum sharing algorithm based on feedback control information in cognitive radio networks  

作　　者：Yibing Li Rui Yang Fang Ye Zhenguo Gao 

机构地区：[1]College of Information and Communication Engineering,Harbin Engineering University [2]College of Automation, Harbin Engineering University

出　　处：《Journal of Systems Engineering and Electronics》2013年第4期564-570,共7页系统工程与电子技术（英文版）

基　　金：supported by the National Natural Science Foundation of China (61073183);the Natural Science Foundation for the Youth of Heilongjiang Province (QC2012C070)

摘　　要：In order to avoid the system performance deterioration caused by the wireless fading channel and imperfect channel estimation in cognitive radio networks, the spectrum sharing problem with the consideration of feedback control information from the primary user is analyzed. An improved spectrum sharing algorithm based on the combination of the feedback control information and the optimization algorithm is proposed. The relaxation method is used to achieve the approximate spectrum sharing model, and the spectrum sharing strategy that satisfies the individual outage probability constraints can be obtained iteratively with the observed outage probability. Simulation results show that the proposed spectrum sharing algorithm can achieve the spectrum sharing strategy that satisfies the outage probability constraints and reduce the average outage probability without causing maximum transmission rate reduction of the secondary user.In order to avoid the system performance deterioration caused by the wireless fading channel and imperfect channel estimation in cognitive radio networks, the spectrum sharing problem with the consideration of feedback control information from the primary user is analyzed. An improved spectrum sharing algorithm based on the combination of the feedback control information and the optimization algorithm is proposed. The relaxation method is used to achieve the approximate spectrum sharing model, and the spectrum sharing strategy that satisfies the individual outage probability constraints can be obtained iteratively with the observed outage probability. Simulation results show that the proposed spectrum sharing algorithm can achieve the spectrum sharing strategy that satisfies the outage probability constraints and reduce the average outage probability without causing maximum transmission rate reduction of the secondary user.

关 键 词：cognitive radio spectrum sharing power control feedback control information. 

分 类 号：TN925[电子电信—通信与信息系统]