The disadvantage of applying Fourier transform to harmonics analysis is that it exists the spectral leakage and fence effect, its frequency resolution is inversely proportional to the sample data length in asynchronous sampling.
利用傅立叶变换进行谐波分析的缺点是在非同步采样时存在频谱泄露和栅栏效应,频率分辨率与采样数据长度成反比。
参考来源 - 电力谐波和间谐波参数估计算法研究This paper firstly analyzes the reason of frequency leakage under non-coherent sampling process, concluding that is caused by the phase variations between the original and truncated signals.
本文首先对谐波信号频谱泄漏的根源进行了分析,讨论和给出了在非同步采样条件下截断信号与原始待分析信号之间的相位偏转关系。
参考来源 - 频谱插值校正分析方法及其应用研究·2,447,543篇论文数据，部分数据来源于NoteExpress
其次，本文分析了非同步采样对电流检测的影响。
Secondly, the impact of the asynchronous sampling on the current detecting is analyzed in this paper.
用此公式能够快速的从非同步采样数据得到信号的幅值相位信息。
Some information such as amplitude and phase can be obtained from this formula very fast.
针对周期信号实际的非同步采样，提出一种频谱插值校正的分析法。
A new spectral interpolated compensation analysis method of periodic signals to compensate the spectral leakage caused by non-coherent sampling process is presented.
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