WANG Hong-xi, YANG Wei-dong, TIAN Wei. Roll Eccentricity Harmonic Parameter Estimation Based on Root-MUSIC of HOC and Prony Method[J]. Acta Electronica Sinica, 2014, 42(11): 2213-2218.
WANG Hong-xi, YANG Wei-dong, TIAN Wei. Roll Eccentricity Harmonic Parameter Estimation Based on Root-MUSIC of HOC and Prony Method[J]. Acta Electronica Sinica, 2014, 42(11): 2213-2218. DOI: 10.3969/j.issn.0372-2112.2014.11.013.
The roll eccentricity signal was complex high frequency periodic signal which is mixed in a variety of random disturbance.As the method of FFT(Fast Fourier Transform) is limitations for analyzing the roll eccentricity signal
in this article a new method is presented that is the combination of Root-Multiple Signal Classification (Root-MUSIC) based on higher-order cumulans (HOC) and Prony method.Using Root-MUSIC of HOC accurately estimate the harmonic frequencies and harmonic number in the meantime the roots which were obtained by the Root-MUSIC directly estimate the harmonic amplitude and phase by using Prony method.The simulation results and experimental results showed that the method is feasibility and effectiveness.In the case of low SNR it still has high spectral resolution and estimation accuracy and can estimate eccentric harmonic frequency amplitude and phase.The advantages of this approach is outstanding than FFT in the frequency resolution and restraining noise.