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Paper Abstract and Keywords
Presentation 2015-07-31 14:25
Effect of PAPR Reduction Method for Massive MIMO Hybrid Beamforming Using High Frequency Bands
Satoshi Suyama, Tatsuki Okuyama, Tatsunori Obara, Yukihiko Okumura (NTT DOCOMO) RCS2015-127
Abstract (in Japanese) (See Japanese page) 
(in English) In order to realize 5G radio access network with super high bit rate and high capacity, super high bit rate transmission is being investigated by introducing small cells using higher frequency bands based on Phantom Cell concept and applying Massive MIMO technology to a base station. In the previous study, the influence of nonlinear distortion caused by high power amplifiers (HPAs) on 20 GHz band 20 Gbps Massive MIMO OFDM transmission has been evaluated by computer simulations in terms of throughput and out-of-radiation and it has been clarified that the out-of-radiation requires the higher linearity and the input back off. This report shows effect of a peak-to-average power ratio (PAPR) reduction method based on clipping and filtering (CF) for Massive MIMO hybrid beamforming (BF) that combines digital precoding with sub-array type analog BF. Concretely, computer simulations show throughput performance and out-of-band radiation of the 20 Gbps transmission under the nonlinear distortion caused by the HPAs and it is clarified that CF can effectively reduce the out-of-band radiation and achieve over 20 Gbps throughput in the Massive MIMO hybrid BF transmission.
Keyword (in Japanese) (See Japanese page) 
(in English) Massive MIMO / Hybrid beamforming / High power amplifier / Nonlinear distortion / PAPR reduction / / /  
Reference Info. IEICE Tech. Rep., vol. 115, no. 160, RCS2015-127, pp. 157-162, July 2015.
Paper # RCS2015-127 
Date of Issue 2015-07-22 (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. (No. 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF RCS2015-127

Conference Information
Committee RCC ASN RCS NS SR  
Conference Date 2015-07-29 - 2015-07-31 
Place (in Japanese) (See Japanese page) 
Place (in English) JA Naganoken Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Wireless Distributed Network, M2M: Machine-to-Machine, D2D (Device-to-Device),etc. 
Paper Information
Registration To RCS 
Conference Code 2015-07-RCC-ASN-RCS-NS-SR 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Effect of PAPR Reduction Method for Massive MIMO Hybrid Beamforming Using High Frequency Bands 
Sub Title (in English)  
Keyword(1) Massive MIMO  
Keyword(2) Hybrid beamforming  
Keyword(3) High power amplifier  
Keyword(4) Nonlinear distortion  
Keyword(5) PAPR reduction  
1st Author's Name Satoshi Suyama  
1st Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
2nd Author's Name Tatsuki Okuyama  
2nd Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
3rd Author's Name Tatsunori Obara  
3rd Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
4th Author's Name Yukihiko Okumura  
4th Author's Affiliation NTT DOCOMO, INC. (NTT DOCOMO)
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Date Time 2015-07-31 14:25:00 
Presentation Time 25 
Registration for RCS 
Paper # IEICE-RCS2015-127 
Volume (vol) IEICE-115 
Number (no) no.160 
Page pp.157-162 
#Pages IEICE-6 
Date of Issue IEICE-RCS-2015-07-22 

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