摘要
以基于平均共识的分布式合作频谱感知算法为基础,提出了一种基于信噪比加权共识的合作频谱感知算法。该算法在平均共识收敛过程中引入能够反映用户的平均信噪比的权重,并以平均共识收敛值为参考确定相应的权重。在不需要信噪比信息的条件下,算法实现了认知Ad Hoc网络中基于信噪比的频谱感知信息加权共识。分析和仿真表明,在用户具有不同的平均信噪比的情况下,该算法克服了基于平均共识的分布式合作频谱感知算法无法体现用户信噪比差异的缺陷,提高了频谱感知的性能。
A signal-to-noise ratio (SNR) weighted-consensus based cooperative spectrum sens-ing algorithm is proposed on the basis of the distributed average consensus-based cooperative spectrum sensing algorithm. The algorithm introduces the weights reflecting userst SNRs into the average consensus and the weights are obtained based on the converged average consensus. Without any SNR knowledge, the algorithm enables effective weighted-consensus of the spec- trum sensing information in distributed cognitive Ad Hoc networks. Both the analysis and sim- ulation results indicate that the proposed algorithm can overcome the inability to distinguish the diversity on usersr SNRs of the average consensus-based algorithm, and improve the per- formance of spectrum sensing.
出处
《数据采集与处理》
CSCD
北大核心
2013年第2期184-189,共6页
Journal of Data Acquisition and Processing
基金
国家重点基础研究发展计划("九七三"计划)(2009CB320400)资助项目
关键词
信噪比
合作感知
平均共识
加权共识
SNR
cooperative sensing
average consensus
weighted consensus
作者简介
杜智勇(1986-),男,硕士研究生,研究方向:移动通信,认知无线电,E—mail:duzhiyong2006@163.com
陈浩楠(1988-),男,硕士研究生,研究方向:移动通信、短波通信
宋绯(1982-),女,博士,讲师,研究方向:移动通信、认知无线电等。