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| 应用小波变换的频谱边缘检测技术研究 | |
| 引用本文： | 刘宁,史浩山,杨博,郭淑霞.应用小波变换的频谱边缘检测技术研究[J].电路与系统学报,2012,17(4):133-136. |
| 作者姓名： | 刘宁 史浩山 杨博 郭淑霞 |
| 作者单位： | 1. 西北工业大学无人机特种技术重点实验室,陕西西安710065;西北工业大学电子信息学院,陕西西安710072 2. 西北工业大学电子信息学院,陕西西安,710072 3. 西北工业大学无人机特种技术重点实验室,陕西西安,710065 |
| 摘 要： | 频谱感知是认知无线电实现的首要步骤。作为分析奇异点和边缘检测的强大数学工具,小波变换被用于探测和估计局部频谱的不规则变化。针对小波变换实现频谱边缘检测的局限条件,提出一种带内非平稳变化,边界连续变化的频谱边缘检测方法。通过对原始频谱信号进行数据预处理和结果峰值变化特性分析,利用小波变换实现频段的边缘划分,最后进行仿真验证。仿真结果表明:本算法能够将带内不光滑且边界连续变化的频谱有效的划分成若干独立频段,从而实现信号频谱边缘检测。 |
| 关 键 词： | 小波变换 边缘检测 奇异点 认知无线电 频谱感知 |
The study of spectrum edge detection based on wavelet transform |
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| LIU Ning , SHI Hao-shan , YANG Bo , GUO Shu-xia.The study of spectrum edge detection based on wavelet transform[J].Journal of Circuits and Systems,2012,17(4):133-136. | |
| Authors: | LIU Ning SHI Hao-shan YANG Bo GUO Shu-xia |
| Institution: | 1(1.Science and Technology on UAV Laboratory Northwestern Polytechnical University,Xi’an 710065,China; 2.School of Electronics and Information Northwestern Polytechnic University,Xi’an 710072,China) |
| Abstract: | Spectrum sensing is the first stage of cognitive radio.As a powerful mathematical tool for analyzing singularities and edge,the wavelet transform is used to detect and estimate the irregularity change of local spectrum.Aim to the limitation of edge detection using wavelet transform,the article puts out a method to detect the edge of spectrum which has the features of non-stationary change in the band and consecutive change between the bands.To deal with the original spectrum and analyze the characters of rising and falling peaks,wavelet transform is used to realize the edge detection,and then the method is validated.The simulation results show that the method can divide the spectrum into several bands and then realize the edge detection of spectrum. |
| Keywords: | wavelet transform edge detection singularity cognitive radio spectrum sensing |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |