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Paper Abstract and Keywords
Presentation 2020-06-25 13:50
User Group Selection Method in Multiuser MIMO-OFDM Transmission with Adaptive PAPR Reduction Using Null Space in MIMO Channel
Shyunsei Shin (Tokyo Univ. of Science), Nobuhide Nonaka (NTT DOCOMO), Kenichi Higuchi (Tokyo Univ. of Science) RCS2020-37
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we investigate the user group selection method in multiuser multiple-input multiple-output (MIMO)- orthogonal frequency division multiplexing (OFDM) transmission when the adaptive peak-to-average power ratio (PAPR) reduction using null space in MIMO channel is applied. The optimal selection of user group to be spatially multiplexed is conducted by evaluating the throughput after PAPR reduction is performed for all combinations of candidate users. However, the computational complexity of the optimal user group selection is prohibitive as the number of candidate users increases for performing concrete PAPR reduction process. To establish computationally efficient user group selection method, we first discuss the relationship between the beamforming (BF) matrix and effect of the PAPR reduction using null space in MIMO channel. Based on the discussion, we propose a pre-selection method of user groups based on the BF matrix. By limiting the full assessment of the throughput evaluation after PAPR reduction process only for the pre-selected user groups, the computational complexity of the proposed method is reduced. Computer simulation results show that the proposed method suppresses the loss in PAPR-vs.-throughput performance while the computational complexity is significantly reduced．
Keyword (in Japanese) (See Japanese page) 
(in English) PAPR / OFDM / multiuser MIMO / user group selection / / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 74, RCS2020-37, pp. 85-90, June 2020.
Paper # RCS2020-37 
Date of Issue 2020-06-17 (RCS) 
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)
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Conference Information
Committee RCS  
Conference Date 2020-06-24 - 2020-06-26 
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 2020-06-RCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) User Group Selection Method in Multiuser MIMO-OFDM Transmission with Adaptive PAPR Reduction Using Null Space in MIMO Channel 
Sub Title (in English)  
Keyword(1) PAPR  
Keyword(2) OFDM  
Keyword(3) multiuser MIMO  
Keyword(4) user group selection  
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1st Author's Name Shyunsei Shin  
1st Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
2nd Author's Name Nobuhide Nonaka  
2nd Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
3rd Author's Name Kenichi Higuchi  
3rd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
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Speaker Author-1 
Date Time 2020-06-25 13:50:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2020-37 
Volume (vol) vol.120 
Number (no) no.74 
Page pp.85-90 
#Pages 6 
Date of Issue 2020-06-17 (RCS) 

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