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Paper Abstract and Keywords
Presentation 2014-11-21 10:55
Quadrature-modulation Transmitter with Tri-level Delta-sigma Modulation for Generating Bi-level EPWM Signal
Takashi Noda, Wataru Someya, Yoshiharu Iikura, Yohtaro Umeda, Yusuke Kozawa (Tokyo Univ. of Science) MW2014-139
Abstract (in Japanese) (See Japanese page) 
(in English) This paper presents a quadrature-modulation (QM) envelope-pulse-width-modulation (EPWM) transmitter with delta-sigma tri-level modulators to generate a bi-level EPWM signal for representing the off state between burst signals. This bi-level transmitter is suitable for directly connecting to a single-ended antenna and advantageous in small size and high power efficiency due to the omission of a transformer used in the conventional tri-level transmitters with two power amplifiers (PAs) in H-bridge configuration. Although simulation including digital signal processing with the QM EPWM and microwave circuit simulation with the power amplifier using n-MOSFETs shows that the error vector magnitude (EVM) of the proposed transmitter is slightly worse than the conventional transmitter, the proposed transmitter shows substantially good EVM performance.
Keyword (in Japanese) (See Japanese page) 
(in English) transmitter / power amplifier / class-D / envelope pulse-width modulation / quadrature modulation / error vector magnitude / coding efficiency / power-added efficiency  
Reference Info. IEICE Tech. Rep., vol. 114, no. 318, MW2014-139, pp. 83-88, Nov. 2014.
Paper # MW2014-139 
Date of Issue 2014-11-13 (MW) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF MW2014-139

Conference Information
Committee MW  
Conference Date 2014-11-20 - 2014-11-21 
Place (in Japanese) (See Japanese page) 
Place (in English) Nagasaki Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave Technologies 
Paper Information
Registration To MW 
Conference Code 2014-11-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Quadrature-modulation Transmitter with Tri-level Delta-sigma Modulation for Generating Bi-level EPWM Signal 
Sub Title (in English)  
Keyword(1) transmitter  
Keyword(2) power amplifier  
Keyword(3) class-D  
Keyword(4) envelope pulse-width modulation  
Keyword(5) quadrature modulation  
Keyword(6) error vector magnitude  
Keyword(7) coding efficiency  
Keyword(8) power-added efficiency  
1st Author's Name Takashi Noda  
1st Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
2nd Author's Name Wataru Someya  
2nd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
3rd Author's Name Yoshiharu Iikura  
3rd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
4th Author's Name Yohtaro Umeda  
4th Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
5th Author's Name Yusuke Kozawa  
5th Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
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Speaker Author-1 
Date Time 2014-11-21 10:55:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # MW2014-139 
Volume (vol) vol.114 
Number (no) no.318 
Page pp.83-88 
#Pages 6 
Date of Issue 2014-11-13 (MW) 

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