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Paper Abstract and Keywords
Presentation 2020-03-06 14:30
[Invited Lecture] Study on Constant-Amplitude OFDM Scheme
Yuyuan Chang, Kazuhiko Fukawa (Tokyo Tech.) RCS2019-391
Abstract (in Japanese) (See Japanese page) 
(in English) Orthogonal frequency-division multiplexing (OFDM) can be considered one of the most effective transmission schemes for digital wireless communications, because OFDM is very robust against multipath channels and inter-symbol interference while dense and orthogonal allocation of the subcarriers can drastically improve the spectral efficiency. However, OFDM suffers from high peak-to-average power ratio (PAPR) due to the use of a large number of subcarriers. To cope with such high PAPR, this report proposes a constant-amplitude OFDM scheme that can achieve PAPR of 0 dB. First, the proposed scheme decomposes an OFDM signal into two constant-amplitude signals, which are transmitted at different timing. On the receiver side, the original OFDM signal is regenerated by combining two received signals that originate from these two constant-amplitude signals, which is equivalent to a received OFDM signal that passes through the wireless channel. As a conventional constant-amplitude OFDM scheme, the constant envelope OFDM (CE-OFDM) scheme transforms the OFDM signal into a phase modulated signal. Computer simulations make a comparison between the proposed and conventional schemes, and demonstrate that the proposed scheme is much superior to CE-OFDM in bit error rate (BER) performance while both the schemes have almost the same out-of-band spectral characteristics.
Keyword (in Japanese) (See Japanese page) 
(in English) wireless communication / OFDM / PAPR / constant-amplitude / constant-envelope / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 448, RCS2019-391, pp. 371-371, March 2020.
Paper # RCS2019-391 
Date of Issue 2020-02-26 (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 SR SRW  
Conference Date 2020-03-04 - 2020-03-06 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To RCS 
Conference Code 2020-03-RCS-SR-SRW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study on Constant-Amplitude OFDM Scheme 
Sub Title (in English)  
Keyword(1) wireless communication  
Keyword(2) OFDM  
Keyword(3) PAPR  
Keyword(4) constant-amplitude  
Keyword(5) constant-envelope  
1st Author's Name Yuyuan Chang  
1st Author's Affiliation Tokyo Institute of Technology (Tokyo Tech.)
2nd Author's Name Kazuhiko Fukawa  
2nd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech.)
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Speaker Author-1 
Date Time 2020-03-06 14:30:00 
Presentation Time 10 minutes 
Registration for RCS 
Paper # RCS2019-391 
Volume (vol) vol.119 
Number (no) no.448 
Page p.371 
Date of Issue 2020-02-26 (RCS) 

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