基于循环平稳特征的OFDM主用户感知的仿真研究  

Primary user detection using cyclostationary properties of OFDM in cognitive radio systems

作　　者：王颖喜[1] 卢光跃[1] 

机构地区：[1]西安邮电学院通信工程系,陕西西安710121

出　　处：《西安邮电学院学报》2009年第5期72-76,共5页Journal of Xi'an Institute of Posts and Telecommunications

基　　金：教育部新世纪优秀人才支持计划(NCET-08-0891)

摘　　要：循环平稳特征可用于认知无线电系统主用户的感知,本文针对OFDM信号分析其循环谱特征,采用频域平滑估计方法对循环谱及其感知性能进行仿真,结果表明在低信噪比下基于循环平稳特征感知的性能优于能量检测。Cyclostationary properties have been shown to be a powerful tool for primary user detection in cognitire radio systems. In this paper, the cyclic spectrum features of the OFDM signal are analyzed, and the cyclic spectrum of the OFDM signal is obtained by frequency - domain smoothing estimation. The simulation results indicate that the detecting performance based on cyclostationary properties is better than that of the energy detection method under low SNR.

关 键 词：循环平稳 OFDM 认知无线电 频谱感知 

分 类 号：TP393.03[自动化与计算机技术—计算机应用技术]