Based on the integer period sample FFT algorithm, a lowest total harmonic distortion (THD) method for determining the base period is proposed in this paper, and the derivation is theoretically given.
在整周期采样的FFT算法的基础上，提出了确定基波周期的总谐波畸变(THD)最小的方法，并作了误差分析。
The main algorithm of spectrum analysis are the base 2 FFT and the spectral calibration that can be detected in the two standards to the location within the wavelength calibration achieved.
光谱获取的算法主要由基2 - FFT和光谱标定实现，光谱标定是通过在可探测波长内取两个标准位置来计算中心波长准确位置的。
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