基于周期平稳特性的频谱感知方法  

A Method based Cyclostationary for Spectrum Sensing

作　　者：邓韦[1] 

机构地区：[1]南京信息职业技术学院通信工程系,江苏南京210046

出　　处：《科技信息》2009年第33期124-124,153,共2页Science & Technology Information

摘　　要：频谱感知是认知无线电中最具挑战的问题之一。实际的无线通信系统中,因为调制、脉冲成型、过采样等操作,大部分的信号都呈现周期平稳特性。介绍了周期平稳信号的定义和特征,分析了利用周期平稳特性进行频谱感知的可行性,最后给出常见调制信号BPSK、QPSK的周期平稳特性。Spectrum sensing is one of the most challenged problems in cognitive radio. Because of modulation, pulse shaping, over-sampling and other operations,most of signals have the character of cyclostationary in the actual wireless communication system. First, the paper gives an introduction of the definition and feature of cyclostationary signals. Then, the feasibility of spectrum sensing using cyclostationary is analyzed. Finally, the cyclostationary of BPSK and QPSK signals is given.

关 键 词：认知无线电 频谱感知 周期平稳 

分 类 号：TN914.5[电子电信—通信与信息系统] TP18[电子电信—信息与通信工程]