基于全相位滤波的密集成分的频率估计

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Abstract To enhance the frequency estimation accuracy for densely-intervaled components,this paper proposed an all-phase filtering based spectrum correction method.Firstly，a factor reflecting the phase linearity deviation of 3 spectral lines centered with the spectral peak was constructed,which can identify whether dense components exist around the frequency position of interest.Secondly,substituting this frequency component into the analytic formula of all-phase narrow-band filter yields all the filter tap coefficients.Lastly,the estimation results were acquired by implementing an existing spectrum correction operation (such as the ratio correction) on the effective sample segment of the all-phase filter’s output.Numerical results show that,the proposed estimator can greatly remove the inter-spectra interference errors and thus achieves a higher accuracy than the existing spectrum method,which possesses a vast potential of applied prospects.

Key words： Frequency estimation All-phase filtering inter-spectra interference analytic formula

Received: 11 August 2017 Published: 15 February 2019

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	Articles by authors
	YANG Jundong1
	YU Jiang1
	HUANG Ming1
	ZHANG Guo2
	GE Fuhua1

Cite this article:

YANG Jundong1,YU Jiang1,HUANG Ming1, et al. Frequency estimation for densely intervaled components based on all-phase filtering[J]. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(4): 77-82.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2019/V38/I4/77

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