摘要
针对非理想报告信道环境中的认知无线电多用户协同频谱感知问题,建立了协同感知三层模型;以单用户为例,分析了报告信道传输错误对单用户感知性能的影响;同时,基于Newman-Pearson准则推导了统计值传输和判决值传输条件下的最优协同频谱感知方法,并给出了平坦瑞利衰落环境下感知性能的上限。
Considering the effect of non-ideal reporting channel on cooperative spectrum sensing in cognitive radio net works, a general 3-layer cooperative sensing model is formulated. The effect of reporting channel error to local sensing （sum mary statistics or decisions based） reliability is investigated. Optimal cooperative spectrum sensing schemes （in Newman-Pear son sense） that take non-ideal reporting channel into account are derived, which provide performance upper bound on coopera tive sensing with reporting error. The results show that the impact of wireless reporting channel on cooperative sensing is sig nificant.
出处
《现代电子技术》
2011年第7期37-40,共4页
Modern Electronics Technique
基金
国家自然科学基金(60832007
60902027
60572090)
国家重大科技专项(2009ZX03003-008-01)资助项目
关键词
认知无线电
频谱感知
协同
非理想报告信道
cognitive radio
spectrum sensing
cooperative
non-ideal reporting channel
