| 基于DFT的信号幅值频谱分析 |
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| 引用本文： | 李新鄂.基于DFT的信号幅值频谱分析[J].襄樊学院学报,2008,29(11):42-44. |
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| 作者姓名： | 李新鄂 |
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| 作者单位： | 襄樊学院,物理与电子信息技术系,湖北,襄樊,441053 |
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| 摘 要： | 根据离散傅里叶变换DFT的定义,推导出一种用DFT计算连续周期信号幅值谱的方法,通过MATLAB仿真验证了该方法的有效性,解释了DFT中存在的频谱泄漏及栅栏效应对该方法的影响,并提出了相应的改进方法.
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| 关 键 词： | DFT 幅值谱 频谱泄漏 |
DFT-Based Analysis on Amplitude Spectrum |
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| LI Xin-e.DFT-Based Analysis on Amplitude Spectrum[J].Journal of Xiangfan University,2008,29(11):42-44. |
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| Authors: | LI Xin-e |
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| Institution: | LI Xin-e(Department of Physics & Electronic Information Technology,Xiangfan University,Xiangfan 441053,China) |
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| Abstract: | According to the definition of DFT,a calculation method of amplitude spectrum for periodic signal is derived in this paper.Through simulation of amplitude spectrum calculation in MATLAB,the efficiency of the method is validated to satisfy the need for project.In the end,the problems of spectrum leakage and picket fence effect are explained and the corresponding solution is proposed. |
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| Keywords: | DFT |
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