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

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 shari...

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Bibliographic Details
Published in:Journal of systems engineering and electronics 2013-08, Vol.24 (4), p.564-570
Main Authors: Li, Yibing, Yang, Rui, Ye, Fang, Gao, Zhenguo
Format: Article
Language:English
Subjects:
Algorithms
Approximation
Channels
Cognitive radio
Feedback control
Networks
Outages
Strategy
中断概率
优化算法
共享模型
反馈控制
控制信息
无线电网络
无线衰落信道
频谱
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Summary: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.
ISSN:1004-4132
1004-4132
DOI:10.1109/JSEE.2013.00065