文档介绍：南京邮电大学
硕士学位论文
基于博弈论的认知无线电频谱共享研究
姓名:唐宁
申请学位级别:硕士
专业:通信与信息系统
指导教师:邵世祥
2011-03
南京邮电大学硕士研究生学位论文摘要
摘要
认知无线电 CR(Cognitive Radio)是一种提高无线通信频谱资源利用率的新技术,为解
决当前效用低下的静态频谱管理方式和不断增长的频谱资源需求之间的矛盾提供了一种
有效的解决思路。无线网络中用户之间对有限频谱资源的竞争可以看作是一个博弈的过
程,无线网络的资源共享和分配可以建立博弈模型,因此博弈论是目前用于研究认知无线
电技术的最常用的方法之一。
本文主要研究两个模型:第一是多个主系统和一个次系统的频谱共享模型,针对原有
模型次系统效用函数的不足,引进了次系统频谱占有率因子,得到了一种改进的次系统效
用函数。仿真结果能够直观的表明随着次系统频谱占有率变大,主系统获得的利润越大;
并且在信道质量变差的情况下,保持较高的次系统频谱占有率能够使得主系统的频谱价格
不会降低,保证了主系统能够获得合理的利润,改善了频谱资源不足的问题。
第二是研究了多个主系统和多个次系统的频谱共享模型,引入了新的效用函数来量化
主系统和次系统的满意度,通过演进博弈论从理论上研究了次系统的竞争模型,并对次系
统中次用户数量变化时主系统共享频谱大小和价格的变化等进行了研究。仿真结果表明在
主系统频谱价格几乎不变的情况下,随着次用户总数的增加主系统共享频谱增大,降低了
次系统租用频谱的代价。

关键词:认知无线电,博弈论,纳什均衡,频谱共享
I
南京邮电大学硕士研究生学位论文 Abstract
Abstract
Cognitive Radio (CR) is a new technology to improve utilization of spectrum resource of
munication. It provides an effective way to solve the conflict between the low
effectiveness of the static spectrum management and the growing demands of spectrum resource.
In the work, petition between users is considered as a game. The
work resources sharing and distribution could establish a game model. Game theory
is one of the monly methods of studying cognitive radio.
It is divides into two models: the first model is multi-primary service and only one
secondary service spectrum sharing mode. According to the insufficient utility function of the
original secondary system model, an improved utility function of the secondary service is
proposed by introducing a more effective reinforced factor based on spectrum occupancy of the
secondary service. The simulation results show that the more spectrum occupancy of the
secondary service, the more profit of primary system. When the channel quality es poor,
price of shared spectrum for the primary service does not reduce with high spectrum occupancy
of the secondary service. This ensures that the primary system can obtain its reasonable profit,
improving spectrum resources