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Paper Abstract and Keywords
Presentation 2021-03-05 14:00
[Special Invited Talk] Present, Past and Future of Wireless Systems -- Looking back the half century with radio --
Masahiro Umehira (Ibaraki Univ.) RCS2020-259 SR2020-86 SRW2020-79
Abstract (in Japanese) (See Japanese page) 
(in English) Just a few special people used wireless systems half century ago, however wireless systems such as mobile communications and wireless LAN (Local Area Network) are indispensable for our dairy life nowadays. There are various kinds of wireless systems using prestigious frequency spectrum, e.g. wireless communication systems and radar systems, and these wireless systems are designed by using radio and networking technologies well suited for the target wireless systems satisfying user or service requirements. One of the most important goals of radio technologies would be to achieve higher spectrum efficiency to utilize the limited frequency resources. Wireless communications have been advancing toward higher transmission speed and higher capacity so far, and mobile communications are now moving forward from 5G to B5G/6G. In addition, various kinds of wireless systems such as RFID (Radio Frequency Identification), sensor and radar will be utilized anywhere in IoT (Internet of Things) era. How will wireless systems including wireless communications look like in IoT era ? What should we tackle as wireless engineers ? This invited talk looks back the research and development of wireless systems which the author has been involved for the half century and try to describe future perspectives of wireless systems.
Keyword (in Japanese) (See Japanese page) 
(in English) Wireless systems / Spectrum efficiency / Mobile communications / IoT / Sensor / Radar / RFID /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 406, SRW2020-79, pp. 96-96, March 2021.
Paper # SRW2020-79 
Date of Issue 2021-02-24 (RCS, SR, SRW) 
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)
Download PDF RCS2020-259 SR2020-86 SRW2020-79

Conference Information
Committee RCS SR SRW  
Conference Date 2021-03-03 - 2021-03-05 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Mobile Communication Workshop 
Paper Information
Registration To SRW 
Conference Code 2021-03-RCS-SR-SRW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Present, Past and Future of Wireless Systems 
Sub Title (in English) Looking back the half century with radio 
Keyword(1) Wireless systems  
Keyword(2) Spectrum efficiency  
Keyword(3) Mobile communications  
Keyword(4) IoT  
Keyword(5) Sensor  
Keyword(6) Radar  
Keyword(7) RFID  
1st Author's Name Masahiro Umehira  
1st Author's Affiliation Ibaraki University (Ibaraki Univ.)
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Date Time 2021-03-05 14:00:00 
Presentation Time 50 
Registration for SRW 
Paper # IEICE-RCS2020-259,IEICE-SR2020-86,IEICE-SRW2020-79 
Volume (vol) IEICE-120 
Number (no) no.404(RCS), no.405(SR), no.406(SRW) 
Page p.260(RCS), p.84(SR), p.96(SRW) 
#Pages IEICE-1 
Date of Issue IEICE-RCS-2021-02-24,IEICE-SR-2021-02-24,IEICE-SRW-2021-02-24 

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