摘要
简要介绍了相关检测法和能量检测法,并在此基础上利用授权用户传输的导频信号和数据信号研究了相关和能量的混合检测法。实验仿真表明在低信噪比情况下,混合检测法优于相关检测法和能量检测法,并且分析了混合检测方法的局限性。
In this paper, we give a brief description of energy detection and coherent detection. Then based on above methods,we discuss a hybrid coherent/energy detection which exploits both the pilot and the data symbols transmitted by the primary user for spectrum sensing. Analytical results show that the hybrid detection outperforms both energy detection and coherent detection in the low SNR. Further, some limitations of hybrid method will be analyzed.
出处
《电子测量技术》
2012年第10期62-64,共3页
Electronic Measurement Technology
关键词
认知无线电
频谱感知
相关检测
能量检测
cognitive radio
spectrum sensing
coherent detection
energy detection
