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Paper Abstract and Keywords
Presentation 2020-05-29 09:30
Accuracy improvement of instantaneous frequency estimation using variable FIR filter with transmission zeros
Keisuke Takao, Takahiro Natori (TUS), Toma Miyata (Salesian Polytechnic), Naoyuki Aikawa (TUS)
Abstract (in Japanese) (See Japanese page) 
(in English) Frequency estimation of sine wave signals has been studied in a wide range of fields.One of the methods is to use instantaneous frequency.In this method, a complex signal called an analysis signal is generated using a Hilbert transformer, and the instantaneous frequency is obtained by differentiating the instantaneous phase of this analysis signal with respect to time.However, since the Hilbert transformer designed with a finite order has ripple as an approximation error, the estimated instantaneous frequency contains an oscillatory component in addition to the true frequency.This error can be suppressed by increasing the order of the Hilbert transducer, but the increase in the order results in an increase in the delay for obtaining the instantaneous frequency.In this paper, the vibration component of the instantaneous frequency component generated by the finite order Hilbert transformer is clarified.Then, it is shown that the instantaneous frequency can be estimated with high accuracy by removing the vibration component using a variable FIR filter with a transmission zeros.
Keyword (in Japanese) (See Japanese page) 
(in English) Frequency estimation / Hilbert transformer / variable filter / / / / /  
Reference Info. ITE Tech. Rep.
Paper #  
Date of Issue  
ISSN Print edition: ISSN 1342-6893  Online edition: ISSN 2424-1970
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Conference Information
Conference Date 2020-05-28 - 2020-05-29 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Image and signal processing/analysis/AI technology, and their application 
Paper Information
Registration To IEICE-SIP 
Conference Code 2020-05-MI-IE-SIP-BioX-IST-ME 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Accuracy improvement of instantaneous frequency estimation using variable FIR filter with transmission zeros 
Sub Title (in English)  
Keyword(1) Frequency estimation  
Keyword(2) Hilbert transformer  
Keyword(3) variable filter  
1st Author's Name Keisuke Takao  
1st Author's Affiliation Tokyo University of Science (TUS)
2nd Author's Name Takahiro Natori  
2nd Author's Affiliation Tokyo University of Science (TUS)
3rd Author's Name Toma Miyata  
3rd Author's Affiliation Salesian Polytechnic (Salesian Polytechnic)
4th Author's Name Naoyuki Aikawa  
4th Author's Affiliation Tokyo University of Science (TUS)
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Date Time 2020-05-29 09:30:00 
Presentation Time 20 
Registration for IEICE-SIP 
Paper #  
Volume (vol) ITE-44 
Number (no)  
#Pages ITE- 
Date of Issue  

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