【摘要】 认知无线电是一种用于提高无线通信频谱利用率的新的智能技术,检测频谱空穴是否存在是实现认知无线电的前提和关键技术之一。首先简述认知无线电的背景和概念,针对认知无线电的频谱感知功能,介绍了基于能量检测的频谱检测方法,并在Matlab环境下进行了仿真实验,比较在相同的虚警概率情况下的检测概率与信噪比的关系。仿真实验结果表明,在相同的虚警概率时,当信噪比大的时候,检测概率越大。更多还原

【Abstract】 Cognitive Radio(CR) is viewed as a novel approach for improving utilization of the precious radio spectrum,Detecting spectrum holes is the prerequisite and key technologies to achieving cognitive radio.This paper first reviews the background and concepts of CR,and then investigates energy detection by focusing on the spectrum sensing function.And then to Compare the relationship of detection probability and SNR in the same probability of false alarm through the simulation under Matlab.Computer simulation shows that the probability of detection with high SNR is bigger than with low SNR under the same probability of false alarm.更多还原