单比特协作压缩频谱感知  

1-bit Cooperative Compressed Spectrum Sensing

作　　者：徐文波[1] 田耘[1] 齐彦松[1] 

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876

出　　处：《北京邮电大学学报》2012年第5期85-89,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家重点基础研究发展计划项目(2009CB320401);国家自然科学基金项目(61171100;61101117);高等学校基本科研业务费资助项目(BUPT 2011RC0101)

摘　　要：提出了一种低开销的协作压缩频谱感知方案,其中每个认知用户利用单比特量化获取压缩采样值的符号信息作为测量值.融合中心收到不同认知用户的符号信息后,利用2种联合感知算法来确定频谱的占用情况.仿真结果表明,新方案具有较好的感知性能,不仅优于独立感知方案,而且在低信噪比时优于多比特量化感知方案.A cooperative compressed spectrum sensing with low cost is proposed.Each cognitive user derives the measurements as the sign information of the compressed samples by using 1-bit quantization.After receiving the sign information from different cognitive users,the fusion center will utilize two joint sensing algorithms to determine the occupancy of the spectrum.Simulations show that the proposed scheme has a preferable performance,which is not only better than that of independent sensing,but also better than the sensing scheme based on multi-bit quantization at low signal-to-noise ratio.

关 键 词：认知无线电 协作频谱感知 压缩感知 单比特量化 

分 类 号：TN911.7[电子电信—通信与信息系统]