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Paper Abstract and Keywords
Presentation 2018-10-19 13:05
Optimization of signal amplitudes for dynamic range of analog-to-digital convertor in digital coherent reception of ultra-high QAM optical signals
Yasuhiro Kawabata, Koji Igarashi (Osaka Univ.) OCS2018-45 OPE2018-81 LQE2018-70
Abstract (in Japanese) (See Japanese page) 
(in English) In the digital coherent reception of ultra-high quadrature amplitude modulation (QAM) optical signals, the received amplitudes in the digital domain could be impaired with the bit resolution and the amplitude operation range of an analogue-to-digital convertor (ADC), which is typically used in digital coherent reception. For the quantization errors due to the bit resolution, it is preferable to make the amplitude of the electrical received signals large. On contrary, the amplitude of the received signals impaired with optical noise could be across the ADC operation range, and then it would be clipped. There is the trade-off relationship between the quantization errors and the clipped errors, and then it is essential to optimize the signal amplitude for the bit resolution and the amplitude operation range, namely ADC dynamic range. In this paper, we numerically evaluate the bit-error ratio (BER) performance of 64QAM optical signals when the signal amplitude before ADC is optimized for the dynamic range of the ADC in coherent reception. We calculate the dependence of the required bit resolution on the sampling rate.
Keyword (in Japanese) (See Japanese page) 
(in English) Quadrature amplitude modulation / Analog-to-digital conversion / Digital signal processing / / / / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 251, OCS2018-45, pp. 93-97, Oct. 2018.
Paper # OCS2018-45 
Date of Issue 2018-10-11 (OCS, OPE, LQE) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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 OCS2018-45 OPE2018-81 LQE2018-70

Conference Information
Committee OPE LQE OCS  
Conference Date 2018-10-18 - 2018-10-19 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
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Paper Information
Registration To OCS 
Conference Code 2018-10-OPE-LQE-OCS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Optimization of signal amplitudes for dynamic range of analog-to-digital convertor in digital coherent reception of ultra-high QAM optical signals 
Sub Title (in English)  
Keyword(1) Quadrature amplitude modulation  
Keyword(2) Analog-to-digital conversion  
Keyword(3) Digital signal processing  
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1st Author's Name Yasuhiro Kawabata  
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 2018-10-19 13:05:00 
Presentation Time 25 minutes 
Registration for OCS 
Paper # OCS2018-45, OPE2018-81, LQE2018-70 
Volume (vol) vol.118 
Number (no) no.251(OCS), no.252(OPE), no.253(LQE) 
Page pp.93-97 
#Pages 5 
Date of Issue 2018-10-11 (OCS, OPE, LQE) 

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