摘要
认知无线电是一种用于提高无线电通信频谱利用率的新的智能技术。论文首先简述了认知无线电的背景和概念;然后针对认知无线电感知频谱环境的功能,详细地对比分析了三种频谱检测的方法:匹配滤波器法、能量检测法和循环平稳特性检测法;最后介绍了“协同机制”用于改善极弱信号的接收问题。
Cognitive radio （CR） is viewed as a novel approach for improving the utilization of a precious natural resource： the radio electromagnetic spectrum. This paper first makes an overview of the background and concept for CR. Then focused on spectrum sensing, the paper investigates three digital signal processing techniques： matched filtering, energy detection, and cyelostationary feature detection. Finally, for the further improvement of the sensing reliability of weak signals, this paper also presents cooperation in cognitive radio.
出处
《信息安全与通信保密》
2007年第3期61-63,共3页
Information Security and Communications Privacy
