Title :
Estimating Mean Frequency for Narrowband Lowpass Signals by Pisarenko Harmonic Decomposition
Author :
Ruihua, Lu ; Guangyuan, Liu
Author_Institution :
Sch. of Electron. & Inf. Eng., Southwest Univ., Chongqing, China
Abstract :
This paper presents a mean frequency estimation method for narrowband lowpass signals. The fundamental idea of this method is that the single frequency approximation for a narrowband lowpass signal embedded in white noise using Pisarenko harmonic decomposition (PHD) algorithm is approximately the power-weighted mean frequency of the signal. In this method, Fourier transform as an indispensable processing link in the conventional power spectrum estimation is given up as well as the convolution effects between the real frequency spectrum and the frequency spectrum of data intercepting window function caused by limited data length are excluded. Experimental results show that the PHD method outperforms the commonly used mean frequency estimation method based on Fourier transform.
Keywords :
Fourier transforms; frequency estimation; signal processing; white noise; Fourier transform; Pisarenko harmonic decomposition; conventional power spectrum estimation; frequency spectrum; mean frequency estimation method; narrowband lowpass signals; white noise; window function; Bandwidth; Convolution; Fast Fourier transforms; Fourier transforms; Frequency estimation; Information technology; Narrowband; Power system harmonics; Spectral analysis; White noise; Fourier transform; Pisarenko harmonic decomposition; mean frequency estimation; narrowband signal; power-weighted mean frequency;
Conference_Titel :
Information Technology and Applications, 2009. IFITA '09. International Forum on
Conference_Location :
Chengdu
Print_ISBN :
978-0-7695-3600-2
DOI :
10.1109/IFITA.2009.289