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Paper Abstract and Keywords
Presentation 2026-06-01 11:20
Circuit-Network Modeling and Power/BER Trade-off-Aware Load Optimization for Backscatter Human Body Communication in an Implantable Environment
Miyu Kodama, Dairoku Muramatsu (UEC) WBS2026-4 RCC2026-4 MICT2026-4
Abstract (in Japanese) (See Japanese page) 
(in English) Communication between implantable medical devices and external devices is essential in implantable medical systems. However, implantable devices must be small and lightweight, which limits their battery capacity, making power saving a key issue. In this study, we apply backscatter communication technology, which is expected to enable batteryless operation, to implantable-to-external communication. We propose a tag internal load impedance optimization method that simultaneously considers the received power of the implantable tag IC and the bit error rate (BER) at the external reader. Specifically, we model the implantable-to-external RFID system as a two-port network and introduce a power-wave reflection coefficient referenced to the Thevenin impedance. We show that the tag received power and BER can be described using the same design variable. We then transform the BER constraint into a modulation-index constraint and formulate the load optimization problem as a convex optimization problem. Finally, using Z-parameters obtained from electromagnetic field analysis of an implantable environment, we present design guidelines for the tag internal load impedance.
Keyword (in Japanese) (See Japanese page) 
(in English) mplantable device / Backscatter communication / RFID / Received power / BER / Convex optimization / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 48, MICT2026-4, pp. 14-19, June 2026.
Paper # MICT2026-4 
Date of Issue 2026-05-25 (WBS, RCC, MICT) 
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 WBS2026-4 RCC2026-4 MICT2026-4

Conference Information
Committee RCC MICT WBS  
Conference Date 2026-06-01 - 2026-06-02 
Place (in Japanese) (See Japanese page) 
Place (in English) Yokosuka Research Park(YRP) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Reliable Communication and Control, Healthcare and Medical Information Communication Technologies, Coding, Modulation, Signal processing and General 
Paper Information
Registration To MICT 
Conference Code 2026-06-RCC-MICT-WBS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Circuit-Network Modeling and Power/BER Trade-off-Aware Load Optimization for Backscatter Human Body Communication in an Implantable Environment 
Sub Title (in English)  
Keyword(1) mplantable device  
Keyword(2) Backscatter communication  
Keyword(3) RFID  
Keyword(4) Received power  
Keyword(5) BER  
Keyword(6) Convex optimization  
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Keyword(8)  
1st Author's Name Miyu Kodama  
1st Author's Affiliation The University of Electro-Communications (UEC)
2nd Author's Name Dairoku Muramatsu  
2nd Author's Affiliation The University of Electro-Communications (UEC)
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Speaker Author-1 
Date Time 2026-06-01 11:20:00 
Presentation Time 25 minutes 
Registration for MICT 
Paper # WBS2026-4, RCC2026-4, MICT2026-4 
Volume (vol) vol.126 
Number (no) no.46(WBS), no.47(RCC), no.48(MICT) 
Page pp.14-19 
#Pages 6 
Date of Issue 2026-05-25 (WBS, RCC, MICT) 

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