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Paper Abstract and Keywords
Presentation 2019-02-22 09:55
[Invited Lecture] A Study on the Specificity of Nonlinear Distortion Radiation in Multitone Transmission using 4.65GHz Band Massive Element Active Antenna System for 5G
Takuji Mochizuki, Masashi Hirabe, Tomohiro Kikuma, Makoto Hayakawa, Daisuke Nose (NEC) AP2018-178
Abstract (in Japanese) (See Japanese page) 
(in English) When operating the Sub6GHz-band massive element Active Antenna System (AAS) for 5 G in high power region, Downlink (DL) SINR to each terminal deteriorates due to the nonlinear distortion which is occurred in the transmitter of AAS, and it became clear that the nonlinear distortion greatly influences the spatial multiplexing performance. Therefore, in this paper, in order to investigate the specificity of nonlinear distortion radiation for AAS, the radiation specificity for the third-order intermodulation distortion (IM3) by 2 tone and the Multitone distortion by OFDM transmission are verified using AAS with Digital Predistortion (DPD). As a result, it is confirmed that the Multitone distortion due to OFDM is also radiated mainly in the same direction as the desired wave for each multiple direction, as similar to the IM3 specificity at 2 tone radiation.
Keyword (in Japanese) (See Japanese page) 
(in English) 5G / AAS / Spatial Multiplexing / Multitone / Nonlinearity distortion / DPD / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 451, AP2018-178, pp. 49-54, Feb. 2019.
Paper # AP2018-178 
Date of Issue 2019-02-14 (AP) 
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 AP2018-178

Conference Information
Committee AP  
Conference Date 2019-02-21 - 2019-02-22 
Place (in Japanese) (See Japanese page) 
Place (in English) Sumitomo Electric Industries (Osaka Works) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Industrial Session, Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2019-02-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study on the Specificity of Nonlinear Distortion Radiation in Multitone Transmission using 4.65GHz Band Massive Element Active Antenna System for 5G 
Sub Title (in English)  
Keyword(1) 5G  
Keyword(2) AAS  
Keyword(3) Spatial Multiplexing  
Keyword(4) Multitone  
Keyword(5) Nonlinearity distortion  
Keyword(6) DPD  
1st Author's Name Takuji Mochizuki  
1st Author's Affiliation NEC Corporation (NEC)
2nd Author's Name Masashi Hirabe  
2nd Author's Affiliation NEC Corporation (NEC)
3rd Author's Name Tomohiro Kikuma  
3rd Author's Affiliation NEC Corporation (NEC)
4th Author's Name Makoto Hayakawa  
4th Author's Affiliation NEC Corporation (NEC)
5th Author's Name Daisuke Nose  
5th Author's Affiliation NEC Corporation (NEC)
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Date Time 2019-02-22 09:55:00 
Presentation Time 25 
Registration for AP 
Paper # IEICE-AP2018-178 
Volume (vol) IEICE-118 
Number (no) no.451 
Page pp.49-54 
#Pages IEICE-6 
Date of Issue IEICE-AP-2019-02-14 

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