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基于多子带信号采样和小波变换的宽带频谱感知 被引量：4

Wideband spectrum sensing approach based on multiband signal sampling and wavelet transform
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摘要 基于调制宽带转换系统(MWC),提出一种基于多子带信号采样和小波变换的宽带频谱感知方法。首先利用MWC实现宽带信号的低速率采样,得到子带信号;然后提出一种噪声功率及检测门限估计方法,再利用能量检测法实现对非噪声子带的频谱感知;最后利用小波变换对信号子带进行频谱边缘检测,以确定主用户信号占用频段的确切位置信息。仿真结果验证了所提出的宽带频谱感知方法的可行性和有效性。 Based on with MWC,this paper proposed a wideband spectrum sensing approach based on multiband signal sampling and wavelet transform.Firstly obtained sub-bands signals by low rate sampling,and then,proposed an estimation method for noise power and threshold,such that the spectrum sensing for signal sub-bands could be carried out by energy detection,at last,used the edge detection for signal sub-bands by using wavelet transform to obtain the exact locations of spectrum occupied by primary users.Simulation results show that the proposed wideband spectrum sensing approach is feasible and effective.
作者 赵知劲 张伟卫 郑仕链
机构地区 杭州电子科技大学通信工程学院 中国电子科技集团第
出处 《计算机应用研究》 CSCD 北大核心 2011年第6期2313-2316,共4页 Application Research of Computers
基金 电科院预研基金资助项目(513060401) 浙江省大学生创新创业孵化项目(ZX100701060) 浙江省教育厅新苗计划资助项目(2008R40G2040115)
关键词 认知无线电 宽带频谱感知 多子带信号采样 调制宽带转换系统 小波变换 能量检测 cognitive radio wideband spectrum sensing multiband signal sampling modulated wideband converter（MWC） wavelet transform energy detection
分类号 TN911 [电子电信—通信与信息系统]
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参考文献19

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同被引文献33

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  • 9Richard Baraniuk,Mark Davenport,Ronald DeVore,Michael Wakin.A Simple Proof of the Restricted Isometry Property for Random Matrices[J].Constructive Approximation.2008(3)
  • 10Tian Zhi,Giannakis G B.Compressed Sensing for Wideband Cognitive Radio[].Procof International Conference on AcousticsSpeechand Signal Processing.2007

引证文献4

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计算机应用研究
2011年 第6期

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