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| Presentation | 2021-03-03 10:35 Non-Orthogonal Multiple Access that allocates subcarriers based on factor graphs Taichi Yamagami, Satoshi Denno, Ahi Ko (Okayama Univ.)  SRW2020-52 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In this paper, we propose a non-orthogonal multiple access in the frequency domain. In the proposed method, multiple users are assigned to each subcarrier orthogonal to each other in the frequency domain, and signals are superimposed to perform overload transmission with a number of users exceeding the number of subcarriers. On the receiver side, each user signal is separated from the superimposed signal by performing MPA (Message Passing Algorithm). we also propose a characteristic improvement method by adaptively allocating user subcarriers in non-orthogonal multiple access in this frequency domain. In the proposed method, the optimum pattern is selected in advance from all the patterns of subcarrier allocation to users. we consider a method of selecting subcarrier allocation based on the LLR (Log-Likelihood Ratio) value calculated from the user's channel information. This proposed method shows an improvement in the characteristics of about $2[mathrm{dB}]$ at the $10^{-3}$ point of BER (Bit Error Rate) compared to the method of fixing the subcarrier allocation. |
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| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Non-Orthogonal Multiple Access / Factor graphs / LLR(Log-Likelihood Ratio) / MPA(Message Passing Algorithm) / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 120, no. 406, SRW2020-52, pp. 7-13, March 2021. | |
| Paper # | SRW2020-52 | |
| Date of Issue | 2021-02-24 (SRW) | |
| 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 | SRW2020-52 |
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| Conference Information | |
| Committee | RCS SR SRW |
| Conference Date | 2021-03-03 - 2021-03-05 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Online |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Mobile Communication Workshop |
| Paper Information | |
| Registration To | SRW |
| Conference Code | 2021-03-RCS-SR-SRW |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Non-Orthogonal Multiple Access that allocates subcarriers based on factor graphs |
| Sub Title (in English) | |
| Keyword(1) | Non-Orthogonal Multiple Access |
| Keyword(2) | Factor graphs |
| Keyword(3) | LLR(Log-Likelihood Ratio) |
| Keyword(4) | MPA(Message Passing Algorithm) |
| Keyword(5) | |
| Keyword(6) | |
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| Keyword(8) | |
| 1st Author's Name | Taichi Yamagami |
| 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 | Ahi Ko |
| 3rd Author's Affiliation | Okayama University (Okayama Univ.) |
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| Speaker | Author-1 |
| Date Time | 2021-03-03 10:35:00 |
| Presentation Time | 25 minutes |
| Registration for | SRW |
| Paper # | SRW2020-52 |
| Volume (vol) | vol.120 |
| Number (no) | no.406 |
| Page | pp.7-13 |
| #Pages | 7 |
| Date of Issue | 2021-02-24 (SRW) |
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