| 非均匀DFT频谱泄漏抑制方法研究 |
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| 引用本文： | 刘保童.非均匀DFT频谱泄漏抑制方法研究[J].西北师范大学学报,2010,46(2):44-49. |
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| 作者姓名： | 刘保童 |
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| 作者单位： | 天水师范学院物理与信息科学学院,甘肃天水741000 |
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| 基金项目： | 甘肃省教育厅科研项目 |
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| 摘 要： | 针对不规则采样信号的谱估计问题,提出一种非均匀离散傅里叶变换频谱泄漏抑制方法,通过迭代非线性估计实现了非均匀采样信号离散傅里叶变换的计算.进行了数值计算试验,并给出了缺失数据重建的应用实例.计算结果表明,该方法能有效抑制非均匀离散傅里叶变换结果中的频谱泄漏,提高DFT频谱的分辨率.
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| 关 键 词： | 离散傅里叶变换 频谱泄漏 分辨率 谐波分析 |
Research on frequency spectrum leakage suppression method of nonuniform DFT |
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| LIU Bao-tong.Research on frequency spectrum leakage suppression method of nonuniform DFT[J].Journal of Northwest Normal University Natural Science (Bimonthly),2010,46(2):44-49. |
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| Authors: | LIU Bao-tong |
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| Institution: | LIU Bao-tong(College of Physics , Information Science,Tianshui Normal University,Tianshui 741000,Gansu,China) |
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| Abstract: | Aiming at spectra estimation issues of irregular sampling signals,this paper presents a suppression method of frequency spectrum leakage for nonuniform discrete Fourier transform(NDFT).The DFT computation of nonuniform sampling signals is performed via iterative nonlinear estimation.Actual computing results show that the approach can effectively suppress frequency spectrum leakage in NDFT results,improve the resolution of DFT spectrum. |
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| Keywords: | discrete Fourier transform frequency spectrum leakage resolution harmonic analysis |
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