A New Synthetic Frequency Estimation Method of Sinusoid Based on Interpolated FFT
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 Fangs estimator are close to the Cramer-Rao Lower Bound when the signal frequency locates in different regions between two neighboring FFT spectral lines. To further improve the estimators performance, a synthetic frequency estimator is constructed. Simulation results show that the root mean square error of synthetic estimator is close to the Cramer-Rao Lower Bound when the signal frequency locates anywhere between two neighboring FFT spectral lines. The synthetic method has low computation complexity and outperforms the existing estimators.
signal processing frequency estimation FFT
Lei Fan Guoqing Qi
College of Information Science and Technology Dalian Maritime University;School of Information Scien College of Information Science and Technology Dalian Maritime University Dalian,China
国际会议
秦皇岛
英文
1725-1729
2015-09-18（万方平台首次上网日期，不代表论文的发表时间）