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Paper Abstract and Keywords
Presentation 2021-06-23 09:30
Considerations on computational complexity reduction in channel prediction based on multipath separation
Daigo Mochizuki, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa, Junichiro Hagiwara, Takanori Sato (Hokkaido Univ.) RCS2021-29
Abstract (in Japanese) (See Japanese page) 
(in English) In multi-user MIMO systems, a base station suppresses inter-user-interferences using downlink channel state information (CSI) for each user and achieve high-data rate transmission.
We need to send pilot symbols frequently to obtain CSI in time varying environments.
Channel prediction, however, can reduce the frequency of pilot transmission.
Among channel prediction schemes, we can expect that the sum-of-sinusoids (SOS) method which separates, predicts, and reconstructs multipath components expands the prediction range of channels.
It has been proposed to realize SOS channel prediction using FISTA, a method of compressed sensing.
We need, however, to apply FISTA twice in the prediction, which requires large computational complexity.
In this paper, we propose SOS channel prediction that uses FISTA and the least-mean square method.
The technique needs FISTA only once, and the computational complexity is much less than the conventional method.
It is also shown that the proposed method achieves excellent channel prediction.
Keyword (in Japanese) (See Japanese page) 
(in English) channel prediction / multipath / SOS method / compressed sensing / FISTA / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 72, RCS2021-29, pp. 1-6, June 2021.
Paper # RCS2021-29 
Date of Issue 2021-06-16 (RCS) 
ISSN 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 RCS2021-29

Conference Information
Committee RCS  
Conference Date 2021-06-23 - 2021-06-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) First Presentation in IEICE Technical Committee, Resource Control, Scheduling, Wireless Communications, etc. 
Paper Information
Registration To RCS 
Conference Code 2021-06-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Considerations on computational complexity reduction in channel prediction based on multipath separation 
Sub Title (in English)  
Keyword(1) channel prediction  
Keyword(2) multipath  
Keyword(3) SOS method  
Keyword(4) compressed sensing  
Keyword(5) FISTA  
1st Author's Name Daigo Mochizuki  
1st Author's Affiliation Hokkaido University (Hokkaido Univ.)
2nd Author's Name Toshihiko Nishimura  
2nd Author's Affiliation Hokkaido University (Hokkaido Univ.)
3rd Author's Name Takeo Ohgane  
3rd Author's Affiliation Hokkaido University (Hokkaido Univ.)
4th Author's Name Yasutaka Ogawa  
4th Author's Affiliation Hokkaido University (Hokkaido Univ.)
5th Author's Name Junichiro Hagiwara  
5th Author's Affiliation Hokkaido University (Hokkaido Univ.)
6th Author's Name Takanori Sato  
6th Author's Affiliation Hokkaido University (Hokkaido Univ.)
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Speaker Author-1 
Date Time 2021-06-23 09:30:00 
Presentation Time 10 minutes 
Registration for RCS 
Paper # RCS2021-29 
Volume (vol) vol.121 
Number (no) no.72 
Page pp.1-6 
Date of Issue 2021-06-16 (RCS) 

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