多接收天线下能量感知的性能研究  

Research on Energy Detection with Multiple Receiving Antennas

作　　者：张培[1] 孙士秀[1] 见春雨[1] 朱卫平[2] 

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003 [2]南京邮电大学信号处理与传输研究院,江苏南京210003

出　　处：《南京邮电大学学报（自然科学版）》2012年第3期36-39,共4页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(60872104);国家博士后科研资助计划(20090451239)资助项目

摘　　要：研究了多天线频谱感知技术,它能显著地提高衰落环境下的频谱感知性能。与协作频谱感知相比,它不需要花费额外的通信带宽开销。介绍了多天线频谱感知的两种实现方式,即基于决策融合的多天线频谱感知和基于数据融合的多天线频谱感知。在基于决策融合的多天线频谱感知中,分析了3种数据融合准则,即"AND"准则,"OR"准则和"K秩"准则。在基于数据融合的多天线频谱感知中,介绍了两种分集技术:最大比合并和选择合并。最后将这两种方式的感知性能通过仿真结果进行分析和比较。Energy detection with multiple antennas is studied in this antennas is able to achieve reliable detection in wireless multi-path paper. Energy detection with multiple fading channels. This method does not need extra communication bandwidth compared with multi-users cooperative spectrum sensing. Two energy detection multiple antennas methods, decision fusion and data fusion, are introduced. For multiple anten- nas with single energy detector, three data fusion rules are analyzed including AND rule, OR rule and K/ N rule. For multiple antennas with multiple energy detectors, maximum ratio processing and selection ratio processing are presented. The performance of multiple antennas with decision fusion and data fusion are analyzed and compared through simulation results.

关 键 词：认知无线电 频谱感知 能量检测 多天线 

分 类 号：TN926[电子电信—通信与信息系统]