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Paper Abstract and Keywords
Presentation 2026-06-17 10:25
On the Relationship Between Base Station Antenna Configuration and MIMO Channel Capacity Distribution -- Outdoor UHF-Band 12x12 MIMO Vehicular Experiments --
Hayato Nakashima, Hidekazu Murata (Yamaguchi Univ.) RCS2026-29
Abstract (in Japanese) (See Japanese page) 
(in English) This paper presents outdoor ultra-high-frequency (UHF)-band $12times12$ multiple-input multiple-output (MIMO) vehicular experiments assuming terminal-collaborated MIMO reception. Six two-antenna software-defined radios were installed in a vehicle and operated as an ideal collaborative receiver through wired connections. The experiments were conducted at 427.2,MHz in an outdoor environment where non-line-of-sight and line-of-sight conditions coexist. Three base-station antenna configurations, namely 1-stack, 2-stack, and 6-stack configurations, were evaluated using received power, MIMO channel capacity, and estimated channel rank. The results show that the MIMO channel capacity increases with received power in all configurations, while capacity variations remain even within the same received-power range. The channel capacity also continued to increase without saturation when the number of receive antennas was increased up to 12. Furthermore, many full-rank regions with a channel rank of 12 were observed in the 1-stack and 2-stack configurations, whereas the 6-stack configuration tended to show lower estimated channel ranks due to the effect of building blockage. These results experimentally clarify the effect of base-station antenna configuration on outdoor UHF-band $12times12$ MIMO channel characteristics.
Keyword (in Japanese) (See Japanese page) 
(in English) MIMO / UHF band / terminal-collaborated MIMO / channel capacity / channel rank / field experiment / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 72, RCS2026-29, pp. 23-28, June 2026.
Paper # RCS2026-29 
Date of Issue 2026-06-10 (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 RCS2026-29

Conference Information
Committee RCS  
Conference Date 2026-06-17 - 2026-06-19 
Place (in Japanese) (See Japanese page) 
Place (in English) The Ohama Nobumoto Memorial Hall 
Topics (in Japanese) (See Japanese page) 
Topics (in English) First Presentation in IEICE Technical Committee, Resource Control, Scheduling, Wireless Communications, etc. 
Paper Information
Registration To RCS 
Conference Code 2026-06-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) On the Relationship Between Base Station Antenna Configuration and MIMO Channel Capacity Distribution 
Sub Title (in English) Outdoor UHF-Band 12x12 MIMO Vehicular Experiments 
Keyword(1) MIMO  
Keyword(2) UHF band  
Keyword(3) terminal-collaborated MIMO  
Keyword(4) channel capacity  
Keyword(5) channel rank  
Keyword(6) field experiment  
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Keyword(8)  
1st Author's Name Hayato Nakashima  
1st Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
2nd Author's Name Hidekazu Murata  
2nd Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
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Speaker Author-1 
Date Time 2026-06-17 10:25:00 
Presentation Time 10 minutes 
Registration for RCS 
Paper # RCS2026-29 
Volume (vol) vol.126 
Number (no) no.72 
Page pp.23-28 
#Pages 6 
Date of Issue 2026-06-10 (RCS) 

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