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Paper Abstract and Keywords
Presentation 2026-04-24 11:10
A Computational Complexity Reduction Method for Iterative Soft Decoding in Overloaded MIMO-OFDM
Riku Mishima, Satoshi Denno, Hou Yafei (Okayama Univ.) RCS2026-11
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we propose a method for reducing the computational complexity of iterative soft decision decoding in overloaded MIMO-OFDM.
In the proposed method, the number of search candidates is reduced by estimating high-confidence bits based on their confidence levels,
thereby achieving a reduction in computational complexity. Simulation results show that under conditions of two transmit antennas and four receive antennas,
computational complexity was reduced to approximately 1.6% of the baseline while achieving a 2 dB improvement in performance at the same BER.
This demonstrates that the trade-off between computational complexity and detection performance can be flexibly controlled.
Keyword (in Japanese) (See Japanese page) 
(in English) Overloaded MIMO / OFDM / soft decoding / LLR / Reduction in computational complexit / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 7, RCS2026-11, pp. 45-50, April 2026.
Paper # RCS2026-11 
Date of Issue 2026-04-16 (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 RCS2026-11

Conference Information
Committee RCS  
Conference Date 2026-04-23 - 2026-04-24 
Place (in Japanese) (See Japanese page) 
Place (in English) Yonago 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Railroad Communications, Inter-Vehicle Communications, Road to Vehicle Communications, Radio Access Technologies, Wireless Communications, etc. 
Paper Information
Registration To RCS 
Conference Code 2026-04-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Computational Complexity Reduction Method for Iterative Soft Decoding in Overloaded MIMO-OFDM 
Sub Title (in English)  
Keyword(1) Overloaded MIMO  
Keyword(2) OFDM  
Keyword(3) soft decoding  
Keyword(4) LLR  
Keyword(5) Reduction in computational complexit  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Riku Mishima  
1st Author's Affiliation Okayama University (Okayama Univ.)
2nd Author's Name Satoshi Denno  
2nd Author's Affiliation Okayama University (Okayama Univ.)
3rd Author's Name Hou Yafei  
3rd Author's Affiliation Okayama University (Okayama Univ.)
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Speaker Author-1 
Date Time 2026-04-24 11:10:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2026-11 
Volume (vol) vol.126 
Number (no) no.7 
Page pp.45-50 
#Pages 6 
Date of Issue 2026-04-16 (RCS) 

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