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Paper Abstract and Keywords
Presentation 2024-03-15 13:30
Coexistence Scheme with Mobile Terminals by Null-Space Expansion in Wireless Power Transfer
Shuma Okita, Yuki Sasaki (Tokyo Univ. of Science), Takahiro Matsuda (Tokyo Metropolitan Univ.), Tomotaka Kimura (Doshisha Univ.), Takefumi Hiraguri (NIT), Kazuki Maruta (Tokyo Univ. of Science) CQ2023-86
Abstract (in Japanese) (See Japanese page) 
(in English) Wireless Power Transfer (WPT) is a promising technology that can supply energy to an increasing number of IoT terminals and sensor networks stably and effectively. However, its large transmission power poses a problem of interference to existing Wireless Information Transfer (WIT) terminals such as Wi-Fi. Null-steering using array antenna from WPT base station is effective for interference suppression. Since the null-space is usually narrow, it is difficult to achieve the desired effect due to the movement of the communication terminals. This paper focuses on Null-Space Expansion (NSE) and proposes an interference suppression method based on it in order to realize stable coexistence of WPT and WIT. In addition, this paper also proposes a method to perform NSE after grouping WIT terminals. Its effectiveness is demonstrated by the computer simulation.
Keyword (in Japanese) (See Japanese page) 
(in English) Wireless Power Transfer / Null Space Expansion / Coexistence / MIMO / / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 431, CQ2023-86, pp. 81-86, March 2024.
Paper # CQ2023-86 
Date of Issue 2024-03-06 (CQ) 
ISSN Online edition: ISSN 2432-6380
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 CQ2023-86

Conference Information
Committee IE MVE CQ IMQ  
Conference Date 2024-03-13 - 2024-03-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa Sangyo Shien Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Media of five senses, Multimedia, Media experience, Picture codinge, Image media quality, Network,quality and reliability, etc(AC) 
Paper Information
Registration To CQ 
Conference Code 2024-03-IE-MVE-CQ-IMQ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Coexistence Scheme with Mobile Terminals by Null-Space Expansion in Wireless Power Transfer 
Sub Title (in English)  
Keyword(1) Wireless Power Transfer  
Keyword(2) Null Space Expansion  
Keyword(3) Coexistence  
Keyword(4) MIMO  
1st Author's Name Shuma Okita  
1st Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
2nd Author's Name Yuki Sasaki  
2nd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
3rd Author's Name Takahiro Matsuda  
3rd Author's Affiliation Tokyo Metropolitan University (Tokyo Metropolitan Univ.)
4th Author's Name Tomotaka Kimura  
4th Author's Affiliation Doshisha University (Doshisha Univ.)
5th Author's Name Takefumi Hiraguri  
5th Author's Affiliation Nippon Institute of Technology (NIT)
6th Author's Name Kazuki Maruta  
6th Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
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Speaker Author-1 
Date Time 2024-03-15 13:30:00 
Presentation Time 20 minutes 
Registration for CQ 
Paper # CQ2023-86 
Volume (vol) vol.123 
Number (no) no.431 
Page pp.81-86 
Date of Issue 2024-03-06 (CQ) 

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