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Paper Abstract and Keywords
Presentation 2019-10-18 09:55
Degradation of Achievable Information Rate due to Phase Noise in Optical Coherent Systems
Song Zhiyuan, Koji Igarashi (Osaka Univ.) OCS2019-41 OPE2019-79 LQE2019-57 Link to ES Tech. Rep. Archives: OPE2019-79 LQE2019-57
Abstract (in Japanese) (See Japanese page) 
(in English) Achievable information rate (AIR) is perfect tool to evaluate the number of the reliably-transmitted information bits per symbol in coded modulation schemes. In the conventional coded modulation, so-called bit-interleaved coded modulation (BICM), AIR is defined by generalized mutual information (GMI) of the binary data recovered from the received symbols through a demapper. In the multilevel coded modulation (MLCM), AIR is determined from mutual information (MI) of the received symbols. In the optical coherent system, the impairment due to the laser phase noise is inevitable. The remained phase fluctuation cannot be negligible even after carrier-phase estimation. In this work, we numerically calculate MI in the presence of laser phase noise for the 16, 64, and 256QAM constellation points. We point out that MI is remarkably degraded due to the residual phase fluctuation in the MLCM system with high-order QAM constellation.
Keyword (in Japanese) (See Japanese page) 
(in English) coherent optical reception / coded modulation / forward error correction / / / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 229, OCS2019-41, pp. 73-76, Oct. 2019.
Paper # OCS2019-41 
Date of Issue 2019-10-10 (OCS, OPE, LQE) 
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 OCS2019-41 OPE2019-79 LQE2019-57 Link to ES Tech. Rep. Archives: OPE2019-79 LQE2019-57

Conference Information
Committee OCS LQE OPE  
Conference Date 2019-10-17 - 2019-10-18 
Place (in Japanese) (See Japanese page) 
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Paper Information
Registration To OCS 
Conference Code 2019-10-OCS-LQE-OPE 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Degradation of Achievable Information Rate due to Phase Noise in Optical Coherent Systems 
Sub Title (in English)  
Keyword(1) coherent optical reception  
Keyword(2) coded modulation  
Keyword(3) forward error correction  
1st Author's Name Song Zhiyuan  
1st Author's Affiliation Osaka University (Osaka Univ.)
2nd Author's Name Koji Igarashi  
2nd Author's Affiliation Osaka University (Osaka Univ.)
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Speaker Author-1 
Date Time 2019-10-18 09:55:00 
Presentation Time 25 minutes 
Registration for OCS 
Paper # OCS2019-41, OPE2019-79, LQE2019-57 
Volume (vol) vol.119 
Number (no) no.229(OCS), no.230(OPE), no.231(LQE) 
Page pp.73-76 
Date of Issue 2019-10-10 (OCS, OPE, LQE) 

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