认知多中继网络中断性能优化研究

研究了认知多中继网络的中断性能优化方法，提出了认知节点发射功率最大值受限和主用户干扰功率受限条件下的最优功率分配（OPA）方法，优化设计感知时间使认知中继网络的中断性能最优。仿真结果表明，最佳功率分配方案的中断性能优于等功率分配（EPA）方案，且存在最佳的感知时间使认知多中继网络的中断性能最优，在高信噪比区域采用多个认知中继协作传输可有效提高认知无线电网络的中断性能。...

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Bibliographic Details
Published in电子技术应用 Vol. 40; no. 5; pp. 111 - 114
Main Author 宋耀莲 酆广增 习玄辉 唐菁敏
Format Journal Article
LanguageChinese
Published 昆明理工大学信息工程与自动化学院,云南昆明650504 2014
南京邮电大学通信与信息工程学院,江苏南京210003%南京邮电大学通信与信息工程学院,江苏南京,210003%国家新闻出版广电总局501台,云南昆明,650302%昆明理工大学信息工程与自动化学院,云南昆明,650504
Subjects
协作传输
最优功率分配
等功率分配
频谱感知
equal power allocation
最优功率分配
等功率分配
频谱感知
协作传输
cooperative transmission
spectrum sensing
optimal power allocation
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Summary:研究了认知多中继网络的中断性能优化方法，提出了认知节点发射功率最大值受限和主用户干扰功率受限条件下的最优功率分配（OPA）方法，优化设计感知时间使认知中继网络的中断性能最优。仿真结果表明，最佳功率分配方案的中断性能优于等功率分配（EPA）方案，且存在最佳的感知时间使认知多中继网络的中断性能最优，在高信噪比区域采用多个认知中继协作传输可有效提高认知无线电网络的中断性能。
Bibliography:In this paper, we investigate the optimization method of outage performance based on cognitive multi-relay networks, and propose optimal power allocation （OPA） method under the constraint of maximum of average transmit power of secondary users and the constraint of average interference power of primary user. Optimal sensing time is designed to minimize the outage probabili ty of cognitive multi-relay networks. Finally, we conduct deep experiments which show that the outage performance of OPA scheme is superior to that of equal power allocation scheme. And there exists an optimal spectrum sensing time to optimize the outage per formance of cognitive multi-relay networks. Furthermore, increasing the number of secondary relays can efficiently improve the out age performance of cognitive relay networks in high SNR region.
Song Yaolian, Feng Guangzeng, Xi Xuanhui, Tang Jingmin （1, Faculty of Information Engineering and Automation, Kunming University of Science and Technoloty, Kunming 650504, China; 2. College of Te
ISSN:0258-7998