余弦信号相位和频率测量的迭代算法

An Iteration Algorithm for Measuring Frequency and Phase of Cosine Function

本文提出一种用于测量频率和两余弦信号间相位角的新算法──三采样点迭代算法，这种算法对每周采样点数和余弦信号的直流偏移无特殊要求，且小相角的测量精度比较高。它能在一个周期内测得余弦信号的相角、频率以及振幅，故非常适合于脉冲信号的相位及功率测量。

In this paper a new algorithm for measuring frequency and measuring phase angle between two cosine signals - - -Three Sampling Point Iteration Algorithm are described.The methed need not special demand for the number of sampling points in a cycle and the direct current deviation of cosine signal, and the precision is very high in small phase. Themethod can calculate the phase angle, frequency and amplitude of two cosine signals in a cycle,so it is very suitable for measuring the phase and power of pulse signal.