基于可靠度和信息共享的分布式频谱检测算法  

Distributed Spectrum Sensing Algorithm Based on Reliability and Information Sharing

作　　者：赵艳丽[1] 谢显中[1] 

机构地区：[1]重庆邮电大学宽带接入网络研究所,重庆400065

出　　处：《电视技术》2012年第17期110-113,共4页Video Engineering

基　　金：国家自然科学基金项目(60872037);重庆市自然科学基金项目(2010BB2415);重庆市教委应用基础研究基金项目(KJ110530)

摘　　要：目前基于可靠度的频谱检测方案主要针对集中式频谱检测。基于已有文献的优点,以信噪比作为可靠度,给出了一种新的基于信息共享的分布式频谱检测算法。在该算法中,认知用户共享本地检测的判决结果和可靠度,可靠度低的用户用比他可靠度高的用户的判决结果来更新自己的判决,需要进行数据传输的两个认知用户的判决结果只要都不存在主用户就可以进行通信,这样便于快速建立连接。通过ROC曲线的仿真结果,检测性能有较好的改进。The current spectrum sensing scheme based on reliability is proposed mainly for the centralized spectrum detection. Based on the advantages of existing literature, a novel distributed spectrum detection algorithm is proposed in this paper, which is based on the information sharing and taking the SNR as reliability. In this algorithm, the local decisions and reliability are shared by CRs. The CR user updates its local decision using others＇ higher decision. For two CR users who are waiting for data transmission, they can communicate with each other when the primary user dose not exist. This makes it easy to establish a connection quickly. Through the ROC curve simulation results, it is found that the detection performance can be improved a lot.

关 键 词：认知无线电 分布式频谱感知 可靠度 信息共享 

分 类 号：TN915[电子电信—通信与信息系统]