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Paper Abstract and Keywords
Presentation 2023-07-13 13:25
Peak Cancellation Signal-Based PAPR Reduction Method Using Null Space in MIMO Channel for MIMO-OFDM Signals under Frequency-Selective Fading Channel
Jun Saito, Kenichi Higuchi (Tokyo Univ. of Science) RCS2023-92
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we propose a parallel peak cancellation (PC) method in the 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. In our previous investigation, multiple peaks are simultaneously suppressed using the PC signal at each frequency block. In this case, since the PC signal of each frequency block has a narrow band, the peak may regrowth due to the influence of the main lobe spread in the time domain. Therefore, the reported method adopts a weight control when adding the PC signal to the transmission signal, which reduce the peak regrowth, however, the PAPR reduction effect decreases. The proposed method employs the adaptive weight control based on the density of target peaks. This improves the PAPR suppression effect while suppressing the reoccurrence of peaks. Furthermore, the proposed method controls the number of peaks simultaneously reduced per iteration according to the number of iterations. When the number of repetitions is small, the number of suppressed peaks is increased to efficiently suppress multiple peaks. When the number of repetitions is large, the number of suppressed peaks is reduced to widen the bandwidth of the PC signal in order to avoid the peak regrowth. Computer simulation results show that the proposed method achieves better PAPR reduction capability compared to the conventional method.
Keyword (in Japanese) (See Japanese page) 
(in English) PAPR / OFDM / MIMO / null space / peak cancellation / computational complexity reduction / frequency-selective channel /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 108, RCS2023-92, pp. 64-69, July 2023.
Paper # RCS2023-92 
Date of Issue 2023-07-05 (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)
Download PDF RCS2023-92

Conference Information
Committee SeMI RCS RCC NS SR  
Conference Date 2023-07-12 - 2023-07-14 
Place (in Japanese) (See Japanese page) 
Place (in English) Osaka University Nakanoshima Center + Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Distributed Wireless Network, M2M (Machine-to-Machine)，D2D (Device-to-Device)，IoT（Internet of Things）, etc 
Paper Information
Registration To RCS 
Conference Code 2023-07-SeMI-RCS-RCC-NS-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Peak Cancellation Signal-Based PAPR Reduction Method 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) null space  
Keyword(5) peak cancellation  
Keyword(6) computational complexity reduction  
Keyword(7) frequency-selective channel  
Keyword(8)  
1st Author's Name Jun Saito  
1st Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
2nd Author's Name Kenichi Higuchi  
2nd Author's Affiliation Tokyo University of Science (Tokyo Univ. of Science)
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Speaker Author-1 
Date Time 2023-07-13 13:25:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2023-92 
Volume (vol) vol.123 
Number (no) no.108 
Page pp.64-69 
#Pages 6 
Date of Issue 2023-07-05 (RCS) 

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