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Paper Abstract and Keywords
Presentation 2015-03-20 10:55
Noise Suppression System for AM Signal using Quadrature Demodulation and Hilbert transformation
Shinya Ito, Mitoshi Fujimoto, Toshikazu Hori (Univ. fukui), Tomohisa Harada, Yoshiyuki Hattori (TCRDL)
Abstract (in Japanese) (See Japanese page) 
(in English) In recent years, problems of interfering of artificial noises from electrical power transfer become large and deterioration of sound quality of AM radio is worried.
In this report, a noise suppression system using quadrature demodulation techniques is proposed to reduce the effect of the interfering. The proposed system utilizes the fact that the in-phase signal form the demodulator includes both of AM signal and interference, however, the quadrature signal includes only the interference. Thus, the interference in the in-phase signal could be canceled by the quadrature signal. Because of the sign of the both interference is different each other, Hilbert transformation is utilized to much the sign of the interferences. Validity of the proposed system is shown through computer simulation and experiment.
Keyword (in Japanese) (See Japanese page) 
(in English) Switching noise / Amplitude modulation / Interference suppression / Hilbert transformation / / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 522, AP2014-218, pp. 39-42, March 2015.
Paper # AP2014-218 
Date of Issue 2015-03-12 (AP) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380

Conference Information
Committee AP  
Conference Date 2015-03-19 - 2015-03-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Fukui University, Bunkyou Campus 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2015-03-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Noise Suppression System for AM Signal using Quadrature Demodulation and Hilbert transformation 
Sub Title (in English)  
Keyword(1) Switching noise  
Keyword(2) Amplitude modulation  
Keyword(3) Interference suppression  
Keyword(4) Hilbert transformation  
1st Author's Name Shinya Ito  
1st Author's Affiliation University of Fukui (Univ. fukui)
2nd Author's Name Mitoshi Fujimoto  
2nd Author's Affiliation University of Fukui (Univ. fukui)
3rd Author's Name Toshikazu Hori  
3rd Author's Affiliation University of Fukui (Univ. fukui)
4th Author's Name Tomohisa Harada  
4th Author's Affiliation ToyotaToyota Central R&D Labs. Inc. (TCRDL)
5th Author's Name Yoshiyuki Hattori  
5th Author's Affiliation ToyotaToyota Central R&D Labs. Inc. (TCRDL)
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Date Time 2015-03-20 10:55:00 
Presentation Time 25 
Registration for AP 
Paper # IEICE-AP2014-218 
Volume (vol) IEICE-114 
Number (no) no.522 
Page pp.39-42 
#Pages IEICE-4 
Date of Issue IEICE-AP-2015-03-12 

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