快速高精度正弦波频率估计综合法

本文分析了正弦波的ＤＦＴ系数的结构，通过ＤＦＴ系数的相位信息，可以对正弦波的频率作为表确的估计。

A Fast and Accurate Single Frequency Estimator Synthetic Approach

The structure of the Dry coefficients of a sine wave is analysed. A new accurate frequency estimator for a single sinusoid is proposed by using the information obtained from the phase of the DFT coefficents. Its performance is complemental with Rife algorithm. So that synthetic approach is proposed. The simulation results indicate that this approach is much better than the DFT and some other fast methods at the cost of double FFT which is far less than the MLE in computer time.