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Paper Abstract and Keywords
Presentation 2026-01-27 10:20
Access Point Clustering and Transmit Power Control Method Based on Differentiable Ray Tracing for Scalable Network Full-Duplex Cell-Free massive MIMO
Yuki Murakami, Kabuto Arai, Koji Ishibashi (UEC) IT2025-62 SIP2025-76 RCS2025-233
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes an access point (AP) clustering and transmit power control method based on differentiable ray tracing (RT) for scalable network-assisted full-duplex (NAFD) cell-free (CF) massive MIMO systems.
In the proposed method, material properties of obstacles within the coverage area, such as permittivity, conductivity, and scattering patterns, are incorporated into the RT model as differentiable parameters.
These material parameters are learned using backpropagation based on three-dimensional coverage maps and pre-measured channel state information within the area.
By exploiting the trained RT model, not only AP-user channels but also inter-user channels can be accurately estimated.
This enables AP clustering and transmit power control accounting for cross link interference between uplink and downlink, which is a major challenge in NAFD CF-mMIMO systems.
Keyword (in Japanese) (See Japanese page) 
(in English) cell-free massive MIMO / network-assisted full duplex / ray tracding / fractional programming / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 334, RCS2025-233, pp. 142-147, Jan. 2026.
Paper # RCS2025-233 
Date of Issue 2026-01-19 (IT, SIP, RCS) 
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 IT2025-62 SIP2025-76 RCS2025-233

Conference Information
Committee IT RCS SIP  
Conference Date 2026-01-26 - 2026-01-27 
Place (in Japanese) (See Japanese page) 
Place (in English) Forest Sendai 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Signal Processing for Wireless Communications, Learning, Mathematics, Information Theory, etc. 
Paper Information
Registration To RCS 
Conference Code 2026-01-IT-RCS-SIP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Access Point Clustering and Transmit Power Control Method Based on Differentiable Ray Tracing for Scalable Network Full-Duplex Cell-Free massive MIMO 
Sub Title (in English)  
Keyword(1) cell-free massive MIMO  
Keyword(2) network-assisted full duplex  
Keyword(3) ray tracding  
Keyword(4) fractional programming  
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1st Author's Name Yuki Murakami  
1st Author's Affiliation The University of Electro-Communications (UEC)
2nd Author's Name Kabuto Arai  
2nd Author's Affiliation The University of Electro-Communications (UEC)
3rd Author's Name Koji Ishibashi  
3rd Author's Affiliation The University of Electro-Communications (UEC)
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Speaker Author-1 
Date Time 2026-01-27 10:20:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # IT2025-62, SIP2025-76, RCS2025-233 
Volume (vol) vol.125 
Number (no) no.332(IT), no.333(SIP), no.334(RCS) 
Page pp.142-147 
#Pages 6 
Date of Issue 2026-01-19 (IT, SIP, RCS) 

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