电讯技术2017，Vol.57Issue(7)：750-755,6.DOI:10.3969/j.issn.1001-893x.2017.07.003
利用秩和检验的多天线协作频谱感知
Cooperative Spectrum Sensing Using Rank-sum Test forMulti-antenna Cognitive Radio
摘要
Abstract
Spectrum sensing is a fundamental component in cognitive radio.To overcome the defects that energy detection is affected by noise uncertainty and the performance of existing cooperative spectrum sensing algorithms on covariance matrix degrades in low antenna correlation scenes,the rank is used to evaluate the power of different antennas,which is caused by channel fading.In this paper,a spectrum sensing algorithm based on rank-sum test is presented.The theoretical expression of decision threshold is also derived,which shows that the decision threshold has no relationship with the sample number.As a result,the threshold does not need to be reset when the sample number changes.Theoretical analysis and simulation show that the performance of the proposed algorithm is robust to noise uncertainty and it has good performance with low antenna correlation.关键词
认知无线电/协作频谱感知/秩和检验/天线相关性/噪声不确定度Key words
cognitive radio/cooperative spectrum sensing/rank-sum test/antenna correlation/noise uncertainty分类
信息技术与安全科学引用本文复制引用
李宁,刘宝生,夏峰,徐偲..利用秩和检验的多天线协作频谱感知[J].电讯技术,2017,57(7):750-755,6.基金项目
国家自然科学基金资助项目(61271276,61301091) （61271276,61301091）
国家高技术研究发展计划(863计划)项目(014AA01A705) （863计划）
