基于时域-空域联合的认知无线电频谱感知算法  

A joint time-space spectrum sensing algorithm for cognitive radio

作　　者：张晓明[1] 李思敏[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《桂林电子科技大学学报》2012年第5期349-352,共4页Journal of Guilin University of Electronic Technology

基　　金：国家自然科学基金(61071018)

摘　　要：为提高认知无线电系统中频谱感知的性能和检测概率,提出了一种时域-空域联合的频谱感知算法。该算法利用主用户信号时域与空域的特性,通过空域感知对主用户定位,利用主用户的定位信息时域感知选择认知用户进而提高检测概率。仿真结果表明,该算法的检测性能优于时域或空域感知。In order to improve the performance of spectrum sensing in cognitive radio system and detection probability,a joint time-space spectrum sensing algorithm is proposed.By exploiting the characteristics of primary user in both the time domain and the space domain,the proposed algorithm enables time sensing to cognitive selectively primary user through its position detected by space sensing,so as to improve the detection probability.Simulation results show that the performance of the algorithm outperforms time-domain or space-domain spectrum sensing algorithm.

关 键 词：认知无线电 频谱感知 时空联合感知 

分 类 号：TN914[电子电信—通信与信息系统]