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Paper Abstract and Keywords
Presentation 2025-03-07 16:45
Constant Amplitude OFDM with the Same Symbol Length for Millimeter-Wave Wireless Communications
Deng Zebang, Kazuhiko Fukawa (Science Tokyo), Satoshi Suyama (NTT DOCOMO) RCS2024-298
Abstract (in Japanese) (See Japanese page) 
(in English) When orthogonal frequency-division multiplexing (OFDM) is adopted as the transmission scheme over millimeter-wave wireless channels, peak-to-average power ratio (PAPR) reduction is absolutely required. To minimize the PAPR, we have proposed constant amplitude OFDM (CA-OFDM) that decomposes the time-domain OFDM signal into two CA signals and that transmits these at different timing. Since CA-OFDM doubles the OFDM symbol length, this report reduces the number of OFDM subcarriers by half and sets the subcarrier modulation at higher-order modulation scheme that can double the bit rate, which results in the same symbol length and throughput. Furthermore, in order to obtain robustness against the phase noise, the transmitter allocates the above two CA signals adjacent to each other, while the receiver performs the frequency-domain equalization and then compensates for degradation caused by the phase noise. To verify the fundamental characteristic of the proposed scheme, computer simulations over frequency selective fading channels without the phase noise demonstrate that the proposed scheme can maintain excellent throughput performance while keeping the same OFDM symbol length.
Keyword (in Japanese) (See Japanese page) 
(in English) wireless communications / millimeter-wave / OFDM / PAPR / phase noise / constant amplitude OFDM / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 409, RCS2024-298, pp. 202-207, March 2025.
Paper # RCS2024-298 
Date of Issue 2025-02-26 (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 RCS2024-298

Conference Information
Committee RCS SR SRW  
Conference Date 2025-03-05 - 2025-03-07 
Place (in Japanese) (See Japanese page) 
Place (in English) Kyoto Institute of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To RCS 
Conference Code 2025-03-RCS-SR-SRW 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Constant Amplitude OFDM with the Same Symbol Length for Millimeter-Wave Wireless Communications 
Sub Title (in English)  
Keyword(1) wireless communications  
Keyword(2) millimeter-wave  
Keyword(3) OFDM  
Keyword(4) PAPR  
Keyword(5) phase noise  
Keyword(6) constant amplitude OFDM  
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Keyword(8)  
1st Author's Name Deng Zebang  
1st Author's Affiliation Institute of Science Tokyo (Science Tokyo)
2nd Author's Name Kazuhiko Fukawa  
2nd Author's Affiliation Institute of Science Tokyo (Science Tokyo)
3rd Author's Name Satoshi Suyama  
3rd Author's Affiliation NTT DOCOMO (NTT DOCOMO)
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Speaker Author-1 
Date Time 2025-03-07 16:45:00 
Presentation Time 25 minutes 
Registration for RCS 
Paper # RCS2024-298 
Volume (vol) vol.124 
Number (no) no.409 
Page pp.202-207 
#Pages 6 
Date of Issue 2025-02-26 (RCS) 

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