摘要
频谱感知是认知无线电的一个基本的技术,用来检测授权频谱中是否有授权用户的存在。频谱检测是认知无线电中最重要的一个环节。由于噪声的存在,现有的许多方法都或多或少地存在局限性。本文基于信号和噪声在多天线系统中相关性的不同,提出一种新的频谱感知方法。该方法不需要信号和噪声的任何先验知识并且算法构成简单,计算速度快,在低信噪比下表现了良好的性能。
Spectrum Sensing is a basic technology in cognitive radio, it is used to detect whether the existence of primary user is in a licensed spectrum. Spectrum detection is the most important factor to determine the performance of cognitive radio. Due to the existence of noise, many algo-rithms are subject to some limitations for application. In this paper, a novel spectrum sensing method is proposed based on the different correlation of signal and noise in multiple antenna systems. This method does not require any prior information about the signal and noise, and also has a good spectrum sensing performance at a low SNR.
出处
《工程与试验》
2010年第4期10-12,共3页
Engineering and Test
关键词
认知无线电
频谱感知
相关
多天线
cognitive radio
spectrum sensing
correlation
multiple antenna
