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Paper Abstract and Keywords
Presentation 2019-01-17 17:15
[Invited Lecture] 160 Gbit/s, 256 QAM bidirectional coherent transmission for next generation mobile fronthaul
Keisuke Kasai, Masato Yoshida, Toshihiko Hirooka, Katsumi Iwatsuki, Masataka Nakazawa (Tohoku Univ.) CS2018-95 OCS2018-75
Abstract (in Japanese) (See Japanese page) 
(in English) We have recently proposed a simple digital coherent transmission system with an injection locking technique for a next generation (5G and post 5G) high-capacity mobile fronthaul. With this scheme, we have demonstrated an 80 Gbit/s, 256 QAM 26 km bidirectional transmission. In this paper, we increase the symbol rate of our previous coherent mobile fronthaul transmission to 10 Gsymbol/s and demonstrate a 160 Gbit/s, 256 QAM bidirectional injection-locked coherent transmission over 26 km-SMF. Here, we evaluate the influence of backward Rayleigh scattering in uplink and downlink data signals. Furthermore, we investigate the loss budget in detail.
Keyword (in Japanese) (See Japanese page) 
(in English) 5G / Mobile fronthaul / Digital coherent optical transmission / QAM / Injection locking / / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 393, CS2018-95, pp. 47-52, Jan. 2019.
Paper # CS2018-95 
Date of Issue 2019-01-10 (CS, OCS) 
ISSN 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 CS2018-95 OCS2018-75

Conference Information
Committee OCS CS  
Conference Date 2019-01-17 - 2019-01-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Nobumoto Ohama Memorial Hall (Ishigaki Island) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Core and metro system, Submarine telecommunications system, Optical access system and next generation PON, Ethernet, Optical Transport Network (OTN), Transmission monitoring and control, Design and tool for optical transmission system, Co-operation between optical and mobile, etc. 
Paper Information
Registration To CS 
Conference Code 2019-01-OCS-CS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) 160 Gbit/s, 256 QAM bidirectional coherent transmission for next generation mobile fronthaul 
Sub Title (in English)  
Keyword(1) 5G  
Keyword(2) Mobile fronthaul  
Keyword(3) Digital coherent optical transmission  
Keyword(4) QAM  
Keyword(5) Injection locking  
1st Author's Name Keisuke Kasai  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Masato Yoshida  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
3rd Author's Name Toshihiko Hirooka  
3rd Author's Affiliation Tohoku University (Tohoku Univ.)
4th Author's Name Katsumi Iwatsuki  
4th Author's Affiliation Tohoku University (Tohoku Univ.)
5th Author's Name Masataka Nakazawa  
5th Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2019-01-17 17:15:00 
Presentation Time 25 minutes 
Registration for CS 
Paper # CS2018-95, OCS2018-75 
Volume (vol) vol.118 
Number (no) no.393(CS), no.394(OCS) 
Page pp.47-52(CS), pp.41-46(OCS) 
Date of Issue 2019-01-10 (CS, OCS) 

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