The set of formulas consists of DFT of sampled data, phase difference calculation and frequency calculation.
频率估计公式包括采样序列DFT、相位差计算和频率计算。
This paper presents calculation of frequency and phase difference of flow signals with spectrum analysis on basics of Fourier transform (DFT).
本文采用基于傅立叶变换(DFT)的频谱分析方法，计算流量信号的频率和相位差。
The formula for the parameter relative phase difference of the pseudo-random tripe-frequency IP method is draw through calculation and analysis of a established RC model, and a proof is given.
通过对建立的RC模型计算分析，引出了伪随机三频激电法的参数相对相位差的计算公式，并加以论证。
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