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Paper Abstract and Keywords
Presentation 2026-09-03 12:50
A study on channel estimation for OFDM systems in time-varying fading channel by using GAIC-based path model selection and EM algorithm
Akira Ito, Masahiro Fuji (Utsunomiya Univ.) CS2026-28
Abstract (in Japanese) (See Japanese page) 
(in English) For Orthogonal Frequency Division Multiplexing (OFDM) systems in time-varying multipath environments, we propose a highly accurate channel estimation and tracking method combining path model selection via the Generalized Akaike Information Criterion (GAIC) and the Expectation-Maximization (EM) algorithm. The proposed method efficiently extracts a suitable path model in the preamble period using a power-based sequential search with GAIC. In the data period, the EM
algorithm tracks time variations using the extracted path model as prior information. Numerical simulations show that the initial estimation accuracy asymptotically approaches the Cramer-Rao lower bound across arbitrary path models. Furthermore, we confirm that the proposed method can successfully track the channel even in highly time-varying environments, achieving superior Mean Squared Error and Bit Error Rate performances.
Keyword (in Japanese) (See Japanese page) 
(in English) OFDM / channel estimation / generalized Akaike information criterion / EM algorithm / / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 166, CS2026-28, pp. 1-6, Sept. 2026.
Paper # CS2026-28 
Date of Issue 2026-08-27 (CS) 
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 CS2026-28

Conference Information
Committee NS IN CS NV  
Conference Date 2026-09-03 - 2026-09-04 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku University + Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Session management (SIP/IMS), Interoperability/Standardization, NGN/NwGN/Future networks, Cloud/Data center networks, SDN (OpenFlow, etc.)/NFV, IPv6, Machine learning, etc. 
Paper Information
Registration To CS 
Conference Code 2026-09-NS-IN-CS-NV 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A study on channel estimation for OFDM systems in time-varying fading channel by using GAIC-based path model selection and EM algorithm 
Sub Title (in English)  
Keyword(1) OFDM  
Keyword(2) channel estimation  
Keyword(3) generalized Akaike information criterion  
Keyword(4) EM algorithm  
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1st Author's Name Akira Ito  
1st Author's Affiliation Utsunomiya University (Utsunomiya Univ.)
2nd Author's Name Masahiro Fuji  
2nd Author's Affiliation Utsunomiya University (Utsunomiya Univ.)
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Speaker Author-1 
Date Time 2026-09-03 12:50:00 
Presentation Time 25 minutes 
Registration for CS 
Paper # CS2026-28 
Volume (vol) vol.126 
Number (no) no.166 
Page pp.1-6 
#Pages 6 
Date of Issue 2026-08-27 (CS) 

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