最优线性认知无线电协作频谱感知技术研究  

Optimal linear cooperation for spectrum sensing in cognitive radio

作　　者：李志瑞[1] 赵路华[1] 程万里[1] 

机构地区：[1]安阳工学院电子信息与电气工程学院,河南安阳455000

出　　处：《信息技术》2015年第1期176-179,共4页Information Technology

摘　　要：频谱感知是检测频谱空穴,实现动态频谱接入的前提和关键。单认知用户检测存在阴影效应和多径衰落等影响,检测效果较差。多用户协作频谱感知是目前频谱感知的主要手段。文中针对常用的协作频谱感知方法的不足,提出一种基于最优线性加权的协作频谱感知方法,对其检测模型与检测算法进行分析,并进行仿真。仿真结果表明,最优线性加权协作频谱感知在相同的条件下相比常用协作频谱感知具有更大的检测概率,更优良的检测性能。Spectrum sensing is the premise and key technology for detecting spectrum holes and realizing dynamic spectrum access in cognitive radio. Due to shadow effect and multi-path fading environment factors ,the spectrum sensing performance of single cognitive user may not be reliable. So cooperative spectrum sensing is the primary means of spectrum sensing. In this paper, the lack of common cooperative spectrum sensing method is proposed; cooperative spectrum sensing method based on optimal linear weighting is presented. Its sensing model and algorithms are analyzed and simulated. The simulation results show that： the optimal linear weighted cooperative spectrum sensing compared to common cooperative spectrum sensing has a greater probability of detection and better performance under the same conditions.

关 键 词：认知无线电 频谱感知 能量检测 线性加权 

分 类 号：TN925[电子电信—通信与信息系统]