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Paper Abstract and Keywords
Presentation 2025-05-15 13:50
Plug-and-Play-Based Receiver Design for Grant-Free NOMA in the Presence of Carrier Frequency Offsets
Kohei Ueda (UEC), Takanori Hara (TUS), Koji Ishibashi (UEC) WBS2025-4 RCC2025-4 MICT2025-4
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes a receiver design for grant-free non-orthogonal multiple access (GF-NOMA) using low-density signature orthogonal frequency division multiplexing (LDS-OFDM) that can compensate for the effects of carrier frequency offset (CFO). The proposed receiver integrates a plug-and-play (PnP) framework, in which parts of the model-based algorithms are replaced by machine learning, to enhance the accuracy of active user detection (AUD) and channel estimation (CE). The proposed receiver performs an initial CFO estimation using a grid-based method and refines the residual CFO through an expectation-maximization algorithm, with the PnP-based AUD and CE that exploit the structure of the transmitted signals. Numerical results demonstrate that the proposed receiver achieves highly accurate AUD and CE even in the presence of CFO.
Keyword (in Japanese) (See Japanese page) 
(in English) Grant-free non-orthogonal multiple access / Plug-and-Play / carrier frequency offset / / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 20, WBS2025-4, pp. 18-23, May 2025.
Paper # WBS2025-4 
Date of Issue 2025-05-08 (WBS, RCC, MICT) 
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 WBS2025-4 RCC2025-4 MICT2025-4

Conference Information
Committee WBS MICT RCC  
Conference Date 2025-05-15 - 2025-05-16 
Place (in Japanese) (See Japanese page) 
Place (in English) KKR Izu-Nagaoka Chitosesou 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Coding, Modulation, Signal processing, Reliable Communication and Control, Healthcare and Medical Information Communication Technologies, and General 
Paper Information
Registration To WBS 
Conference Code 2025-05-WBS-MICT-RCC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Plug-and-Play-Based Receiver Design for Grant-Free NOMA in the Presence of Carrier Frequency Offsets 
Sub Title (in English)  
Keyword(1) Grant-free non-orthogonal multiple access  
Keyword(2) Plug-and-Play  
Keyword(3) carrier frequency offset  
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1st Author's Name Kohei Ueda  
1st Author's Affiliation The University of Electro-Communications (UEC)
2nd Author's Name Takanori Hara  
2nd Author's Affiliation Tokyo University of Science (TUS)
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 2025-05-15 13:50:00 
Presentation Time 20 minutes 
Registration for WBS 
Paper # WBS2025-4, RCC2025-4, MICT2025-4 
Volume (vol) vol.125 
Number (no) no.20(WBS), no.21(RCC), no.22(MICT) 
Page pp.18-23 
#Pages 6 
Date of Issue 2025-05-08 (WBS, RCC, MICT) 

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