Iterative Frequency Estimation For Accuracy Improvement of Three DFT Phase-Based Methods

作者：Pang Hee Suk^*; Lim Jun Seok; Kwon Oh Jin; Shin Bhum Jae

来源：IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences, 2012, E95A(5): 969-973.

DOI：10.1587/transfun.E95.A.969

• iterative frequency estimation
• DFT phase-based methods
• frequency estimation error

We propose an iterative frequency estimation method for accuracy improvement of discrete Fourier transform (DFT) phase-based methods. It iterates frequency estimation and phase calculation based on the DFT phase-based methods, which maximizes the signal-to-noise floor ratio at the frequency estimation position. We apply it to three methods, the phase difference estimation, the derivative estimation, and the arctan estimation, which are known to be among the best DFT phase-based methods. Experimental results show that the proposed method shows meaningful reductions of the frequency estimation error compared to the conventional methods especially at low signal-to-noise ratio.

• 出版日期2012-5