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Paper Abstract and Keywords
Presentation 2020-05-21 00:00
A Study on Non-Orthogonal Pilot Design for Grant-Free Multi-User Massive MIMO
Takanori Hara, Koji Ishibashi (The Univ. of Electro-Communications) RCS2020-22
Abstract (in Japanese) (See Japanese page) 
(in English) To accommodate a large number of users with low latency, grant-free access has gained much attention. As one of the conventional schemes, unsourced random access (URA), which all users transmit utilizing the sequence selected from a common set of non-orthogonal sequences, has been proposed. The asymptotic success probabilities of URA employing a massive MIMO were derived for both cases of complex Gaussian sequences and Zadoff-Chu (ZC) sequences, and it was hence shown that the URA exploiting ZC sequences outperforms. Although there exist other sequences which may provide the superior interference suppression performance to ZC ones, the success probabilities of URA utilizing them have not been investigated yet. In this paper, we study the probabilities for the two sequences, which are the one is based on a discrete Fourier transform matrix, and another is designed Frame-theoretically to suppress interference, and show their advantageous regions via computer simulations.
Keyword (in Japanese) (See Japanese page) 
(in English) Grant-free access / massive MIMO / non-orthogonal pilot / / / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 29, RCS2020-22, pp. 67-72, May 2020.
Paper # RCS2020-22 
Date of Issue 2020-05-14 (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 RCS2020-22

Conference Information
Committee IN RCS NV  
Conference Date 2020-05-21 - 2020-05-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Ad-Hoc/Sensor Networks/MANET, Mobile Networks, M2M/IoT Communications, Wi-Fi, IEEE802.15(ZigBee) and others 
Paper Information
Registration To RCS 
Conference Code 2020-05-IN-RCS-NV 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on Non-Orthogonal Pilot Design for Grant-Free Multi-User Massive MIMO 
Sub Title (in English)  
Keyword(1) Grant-free access  
Keyword(2) massive MIMO  
Keyword(3) non-orthogonal pilot  
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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Date Time 2020-05-21 00:00:00 
Presentation Time  
Registration for RCS 
Paper # IEICE-RCS2020-22 
Volume (vol) IEICE-120 
Number (no) no.29 
Page pp.67-72 
#Pages IEICE-6 
Date of Issue IEICE-RCS-2020-05-14 

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