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Paper Abstract and Keywords
Presentation 2020-03-04 10:55
Transmission Efficiency of Uplink Grant-Free Non-Orthogonal Multiple Access
Takanori Hara, Koji Ishibashi (The Univ. of Electro-Communications) RCS2019-325
Abstract (in Japanese) (See Japanese page) 
(in English) To accommodate a large number of users efficiently, grant-free non-orthogonal multiple access (GF-NOMA) has gained much attention. One conventional scheme based on compressed sensing jointly performs active user detection (AUD), channel estimation (CE), and data detection via multiple measurement vector approximate message passing. An alternative approach is joint data and active user detection via coordinated descent method based on covariance estimation where multiple sequences are allocated to each user. However, the performance comparison between them has not been studied so far, and it is not clear which one is more efficient. In this paper, we discuss their performances and show their advantageous regions via computer simulations.
Keyword (in Japanese) (See Japanese page) 
(in English) Grant-free non-orthogonal multiple access / compressed sensing / approximate message passing / covariance estimation / coordinate descent method / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 448, RCS2019-325, pp. 31-36, March 2020.
Paper # RCS2019-325 
Date of Issue 2020-02-26 (RCS) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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 RCS2019-325

Conference Information
Committee RCS SR SRW  
Conference Date 2020-03-04 - 2020-03-06 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To RCS 
Conference Code 2020-03-RCS-SR-SRW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Transmission Efficiency of Uplink Grant-Free Non-Orthogonal Multiple Access 
Sub Title (in English)  
Keyword(1) Grant-free non-orthogonal multiple access  
Keyword(2) compressed sensing  
Keyword(3) approximate message passing  
Keyword(4) covariance estimation  
Keyword(5) coordinate descent method  
1st Author's Name Takanori Hara  
1st Author's Affiliation The University of Electro-Communications (The Univ. of Electro-Communications)
2nd Author's Name Koji Ishibashi  
2nd Author's Affiliation The University of Electro-Communications (The Univ. of Electro-Communications)
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Speaker Author-1 
Date Time 2020-03-04 10:55:00 
Presentation Time 20 minutes 
Registration for RCS 
Paper # RCS2019-325 
Volume (vol) vol.119 
Number (no) no.448 
Page pp.31-36 
Date of Issue 2020-02-26 (RCS) 

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