Title :
A Fine Resolution Frequency Estimator Based on Double Sub-segment Phase Difference
Author :
Xiangdong Huang ; Xiang-Gen Xia
Author_Institution :
Sch. of Eectronics & Inf. Eng., Tianjin Univ., Tianjin, China
Abstract :
A DFT-based frequency estimator with low computational complexity is proposed, which is derived by extracting the phase difference from the peak DFT bins of two sub-segments from input samples. Some of its statistical properties, such as asymptotical unbiasedness and error variance, are derived. Furthermore, an iterative procedure of frequency estimate is also presented. Simulation results show that the proposed estimator´s accuracy is close to those of AM estimator and CO estimator.
Keywords :
computational complexity; discrete Fourier transforms; frequency estimation; iterative methods; signal resolution; AM estimator; CO estimator; DFT-based frequency estimator; asymptotical unbiasedness; computational complexity; double sub-segment phase difference; error variance; fine resolution frequency estimator; iterative procedure; peak DFT bins; statistical properties; Accuracy; Computational complexity; Discrete Fourier transforms; Estimation; Frequency estimation; Signal to noise ratio; DFT; frequency estimator; phase difference;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2014.2385086