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Paper Abstract and Keywords
Presentation 2020-06-25 13:25
PC-Signal-Based PAPR Reduction Using Null Space in MIMO Channel for MIMO-OFDM Signals under Frequency-Selective Fading Channel
Leon Yamaguchi (Tokyo Univ. of Science), Nobuhide Nonaka (NTT DOCOMO), Kenichi Higuchi (Tokyo Univ. of Science) RCS2020-36
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we propose a computational complexity-efficient algorithm for the adaptive peak-to-average power ratio (PAPR) reduction using the null space in a multiple-input multiple-output (MIMO) channel for MIMO-orthogonal frequency division multiplexing (OFDM) signals under frequency-selective fading channel. We first show that the effect of the adaptive PAPR reduction method using null space in MIMO channel is enhanced in frequency-selective fading channel. Then, we extend our previously reported peak cancellation (PC) signal-based algorithm (PCCNC) to accommodate the frequency-selective fading channel. In the proposed PCCNC, the PC signal vector is generated by multiplying basic pulse signals whose transmission band are limited to respective frequency blocks with beamforming (BF) vector directed to the null space of the MIMO channel at each of frequency blocks. By adding the averaged peak cancellation (PC) signals of each frequency block to the transmitted signal vector in the time domain, PAPR reduction is achieved. The constraint so that the PC signal is transmitted only to the null space in the MIMO channel by BF makes interference from PC signal to the data streams not observed at the receiver side. We show that the throughput-vs.-PAPR performance of the proposed method is improved as the frequency-selectivity of the channel is increased and the proposed PCCNC successfully reduces the computational complexity compared to the conventional clipping and filtering (CF)-based algorithm.
Keyword (in Japanese) (See Japanese page) 
(in English) PAPR / OFDM / MIMO / clipping and filtering / peak cancellation / computational complexity reduction / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 74, RCS2020-36, pp. 79-84, June 2020.
Paper # RCS2020-36 
Date of Issue 2020-06-17 (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)
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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) PC-Signal-Based PAPR Reduction Using Null Space in MIMO Channel for MIMO-OFDM Signals under Frequency-Selective Fading Channel 
Sub Title (in English)  
Keyword(1) PAPR  
Keyword(2) OFDM  
Keyword(3) MIMO  
Keyword(4) clipping and filtering  
Keyword(5) peak cancellation  
Keyword(6) computational complexity reduction  
1st Author's Name Leon Yamaguchi  
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 2020-06-25 13:25:00 
Presentation Time 25 
Registration for RCS 
Paper # IEICE-RCS2020-36 
Volume (vol) IEICE-120 
Number (no) no.74 
Page pp.79-84 
#Pages IEICE-6 
Date of Issue IEICE-RCS-2020-06-17 

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