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Paper Abstract and Keywords
Presentation 2024-02-29 10:55
A Study of Digital Modulation Computation Bit Count and 1- bit BP Delta Delta-Sigma Modulation OSR for 40 -GHz Band Direct Digital RF ModulatoModulator
Kouki Nakamura, Satoshi Tsukamoto, Junhao Zhang, Yuki Fujiya, Tomoyuki Furuichi, Noriharu Suematsu (Tohoku Univ.) MW2023-176
Abstract (in Japanese) (See Japanese page) 
(in English) For future Low Earth Orbit (LEO) constellation satellite communication system, a development millimeter-wave digital beam forming (DBF) antenna and transceiver become emerging technologies. We proposed direct digital RF (DRF) transmitter for this purpose and have showed the feasibility. In this feasibility study, RF section was actually made but digital signal processing (DSP) section was not made but was off-line batch processing. In this paper, we confirm the computation bit count of the direct DRF modulator section and the effect of Oversampling Ratio (OSR) on ACLR, and based on the results and the effect of ACLR(Adjacent Channel Leakage Ratio) improvement by using multiple elements, we present the results of our study on the maximum bandwidth that meets the requirements for a Beyond 5G system.
Keyword (in Japanese) (See Japanese page) 
(in English) Direct digital RF / Non-Terrestrial Network / Millimeter wave / 1-bit ΔΣ modulation / / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 396, MW2023-176, pp. 9-14, Feb. 2024.
Paper # MW2023-176 
Date of Issue 2024-02-22 (MW) 
ISSN 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 MW2023-176

Conference Information
Committee MW  
Conference Date 2024-02-29 - 2024-03-01 
Place (in Japanese) (See Japanese page) 
Place (in English) Okayama Prefectural University 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave, etc. 
Paper Information
Registration To MW 
Conference Code 2024-02-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study of Digital Modulation Computation Bit Count and 1- bit BP Delta Delta-Sigma Modulation OSR for 40 -GHz Band Direct Digital RF ModulatoModulator 
Sub Title (in English)  
Keyword(1) Direct digital RF  
Keyword(2) Non-Terrestrial Network  
Keyword(3) Millimeter wave  
Keyword(4) 1-bit ΔΣ modulation  
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1st Author's Name Kouki Nakamura  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Satoshi Tsukamoto  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
3rd Author's Name Junhao Zhang  
3rd Author's Affiliation Tohoku University (Tohoku Univ.)
4th Author's Name Yuki Fujiya  
4th Author's Affiliation Tohoku University (Tohoku Univ.)
5th Author's Name Tomoyuki Furuichi  
5th Author's Affiliation Tohoku University (Tohoku Univ.)
6th Author's Name Noriharu Suematsu  
6th Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2024-02-29 10:55:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # MW2023-176 
Volume (vol) vol.123 
Number (no) no.396 
Page pp.9-14 
#Pages 6 
Date of Issue 2024-02-22 (MW) 

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