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Paper Abstract and Keywords
Presentation 2021-06-23 13:30
Investigation of PAPR Reduction Using Null Space in MIMO Channel for MIMO-OFDM Signals in Multiple-Antenna AF Relay Transmission
Yuki Sekiguchi (Tokyo Univ. of Science), Nobuhide Nonaka (NTT DOCOMO), Kenichi Higuchi (Tokyo Univ. of Science) RCS2021-39
Abstract (in Japanese) (See Japanese page) 
(in English) In the 5th generation mobile communication system and beyond, the importance of relay transmission increases in order to provide wide coverage of the high speed and high quality data transmission using higher carrier frequency band such as millimeter wave band. Assuming the multiple-input multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) transmission as a baseline of the 5G system, mitigation of its high peak-to-average power ratio (PAPR) not only at the base station (BS) transmitter but also at the relay station (RS) transmitter is essential to achieve sufficient coverage enhancement from the usage of RS by reducing the transmission power backoff levels at the nonlinear power amplifier. In this paper, we propose to apply our previously reported adaptive PAPR reduction method using null space in MIMO channel for MIMO-OFDM transmission to RS. In this work, we assume an amplify-and-forward (AF)-type RS with multiple antennas. Computer simulation results show that PAPR-vs.-throughput is much improved by the proposed system compared to the conventional one thanks to the reduced interference levels from the PAPR reduction signal observed at the user terminal receiver.
Keyword (in Japanese) (See Japanese page) 
(in English) PAPR / OFDM / Multiuser MIMO / AF relaying / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 72, RCS2021-39, pp. 62-67, June 2021.
Paper # RCS2021-39 
Date of Issue 2021-06-16 (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 RCS2021-39

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) Investigation of PAPR Reduction Using Null Space in MIMO Channel for MIMO-OFDM Signals in Multiple-Antenna AF Relay Transmission 
Sub Title (in English)  
Keyword(1) PAPR  
Keyword(2) OFDM  
Keyword(3) Multiuser MIMO  
Keyword(4) AF relaying  
1st Author's Name Yuki Sekiguchi  
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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Date Time 2021-06-23 13:30:00 
Presentation Time 10 
Registration for RCS 
Paper # IEICE-RCS2021-39 
Volume (vol) IEICE-121 
Number (no) no.72 
Page pp.62-67 
#Pages IEICE-6 
Date of Issue IEICE-RCS-2021-06-16 

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