摘要
认知无线电系统必须能够及时检测到原始用户的工作状态以避免形成相互干扰,论文主要讨论用于频谱感知的信号检测理论。大部分人工合成的信号都可以看成是循环平稳随机过程,利用谱相关函数可以有效地检测这些信号,文中主要考虑用循环谱密度监测原始用户的可行性。此外,文章还对认知无线电中的协作检测法做了分析。
A cognitive radio must detect the presence of primary users to avoid interfering with them. In this paper, signal detection methods for spectrum sensing in wireless RAN systems are discussed. As most of the manmade signals can be treated as cyclostationary random process, the spectral correlation function is effective for detecting these signals. This paper focuses on using cyclic spectrum density to detect the primary receivers. In addition, this paper also presents cooperative, detection in cognitive radios.
出处
《信息安全与通信保密》
2008年第1期49-51,共3页
Information Security and Communications Privacy
关键词
频谱空穴
循环自相关函数
循环谱密度
spectrum hole
cyclic autocorrelation function
cyclic spectrum density
