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Paper Abstract and Keywords
Presentation 2026-07-24 15:20
Multi-User MIMO Communications Via Feederless Active Phased Array for Satellite Formation Flying
Yuto Ozawa, Kentaro Murata, Naoki Honma (Iwate Univ.), Atsushi Shirane (Science Tokyo), Shutai Okamura (IST), Sumio Morioka (IST/Osaka Univ.) AP2026-67
Abstract (in Japanese) (See Japanese page) 
(in English) To realize high-speed, large-capacity satellite direct-to-device (D2D) communication, feederless active phased array for satellite formation flying, which consists of a primary satellite and a very large number of secondary satellites, is being investigated.
This paper proposes an optimization method considering hardware constraints of secondary satellites to implement single-polarization and -frequency multi-user communication.
Numerical analysis demonstrates that the proposed method achieves a channel capacity 2.9 times higher than that of time-division duplexing (TDD).
Furthermore, the results reveal that the channel capacity are fundamentally determined by the geometrical configurations of the primary and secondary satellites and ground terminals.
Keyword (in Japanese) (See Japanese page) 
(in English) satellite communication / direct-to-device communication / multi-user MIMO / SDR / SCA / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 122, AP2026-67, pp. 142-147, July 2026.
Paper # AP2026-67 
Date of Issue 2026-07-15 (AP) 
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 AP2026-67

Conference Information
Committee SAT AP SANE  
Conference Date 2026-07-22 - 2026-07-24 
Place (in Japanese) (See Japanese page) 
Place (in English) Kobe Port Oasis 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Remote sensing, Sattelite Communication, Radio propagation, Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2026-07-SAT-AP-SANE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Multi-User MIMO Communications Via Feederless Active Phased Array for Satellite Formation Flying 
Sub Title (in English)  
Keyword(1) satellite communication  
Keyword(2) direct-to-device communication  
Keyword(3) multi-user MIMO  
Keyword(4) SDR  
Keyword(5) SCA  
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Keyword(7)  
Keyword(8)  
1st Author's Name Yuto Ozawa  
1st Author's Affiliation Iwate University (Iwate Univ.)
2nd Author's Name Kentaro Murata  
2nd Author's Affiliation Iwate University (Iwate Univ.)
3rd Author's Name Naoki Honma  
3rd Author's Affiliation Iwate University (Iwate Univ.)
4th Author's Name Atsushi Shirane  
4th Author's Affiliation Science Tokyo (Science Tokyo)
5th Author's Name Shutai Okamura  
5th Author's Affiliation Interstellar Technologies Inc. (IST)
6th Author's Name Sumio Morioka  
6th Author's Affiliation Interstellar Technologies Inc./Osaka University (IST/Osaka Univ.)
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Speaker Author-1 
Date Time 2026-07-24 15:20:00 
Presentation Time 20 minutes 
Registration for AP 
Paper # AP2026-67 
Volume (vol) vol.126 
Number (no) no.122 
Page pp.142-147 
#Pages 6 
Date of Issue 2026-07-15 (AP) 

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