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In order to further improve the estimation precision of sinusoidal frequency, a new estimation method based on Fast Fourier Transform (FFT) is proposed. Zero-padding is used before the coarse estimation. And three sample values of Discrete-Time Fourier Transform (DTFT) of the original signal is used to perform the fine estimation. In the computer simulations, it can be shown that the proposed estimation...
A new frequency estimator of sinusoid based on interpolated FFT amplitudes is proposed. The coarse frequency estimation is made by the position of the maximum DFT amplitude. Then the fine estimation is made by utilizing the amplitudes of two DFT coefficients. Simulation results show that the root mean square errors of frequency estimation of the proposed estimator and Fang's estimator are close to...
A new frequency estimator of sinusoid based on interpolated FFT amplitudes is proposed. Firstly, zeros of length N are padded to the sinusoid sampled data of length N in the time domain. Next, 2N-point FFT is performed and the coarse estimation is made by searching the location of the spectrum line with maximum amplitude. Finally, the fine estimation is made by utilizing the amplitudes of the spectrum...
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