北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2009, Vol. 32 ›› Issue (2): 89-92.doi: 10.13190/jbupt.200902.89.yugc

• 研究报告 • 上一篇    下一篇

感知无线电系统中改进的循环频谱检测算法

虞贵财 罗涛 黄振 乐光新   

  1. 北京邮电大学
  • 收稿日期:2008-10-08 修回日期:2009-01-12 出版日期:2009-04-28 发布日期:2009-04-28
  • 通讯作者: 虞贵财

An Improved Cyclic Spectrum Detection Algorithm in CR Systems

  • Received:2008-10-08 Revised:2009-01-12 Online:2009-04-28 Published:2009-04-28

摘要:

提出一种基于改进的正交频分复用(OFDM)循环谱检测算法,该算法检测率高,所需检测时间短,运算复杂度几乎不变. 仿真结果表明,与传统循环谱算法相比,该算法在信噪比低1个数量级而检测时间不变的情况下,检测性能仍优于传统循环谱算法,增强了对微弱信号的检测能力,提高了频谱检测的性能.

关键词: 感知无线电, 频谱检测, 循环平稳特性, 循环谱。

Abstract:

A new orthogonal frequency division multiplexing (OFDM) cyclic spectrum detection scheme is presented based on intended signature. Compared with original schemes, the proposed scheme will improve the detection performance under condition of a lower signalnoiseratio and unincreased detection duration. This scheme enhances the robust of against noise uncertainty effectivelyand gets a robustly result of detecting weak signals and improves the detection performance.

Key words: Cognitive radio, spectrum detection, cyclostationarity, cyclic spectrum.