六点拟合的正弦信号的插值多项式测频

A Fast Method of Sinusoid Frequency Estimation with Cubic Convolution Interpolation by Six Datas

本文提出一种新的快速测量正弦信号频率的方法,它主要利用三次多项式插值函数来拟合6个经过DFT变换的数据点,然后通过求插值函数的极值点来进行频率估计。仿真结果证明方法的有效性和简便性。

A simple effective frequency estimation method is proposed using cubic convolution. This method needs only six data calculated by DFT. The performances of the method is illustrated by computer simulations.