Paper Abstract and Keywords |
Presentation |
2021-03-01 14:05
[Invited Lecture]
Transmitter Nonlinearity Compensator for Short-Reach IM/DD PAM Signalling with Tomlinson-Harashima Precoding (THP) Nobuhiko Kikuchi (Hitachi) PN2020-43 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Intra- and inter-DC traffic is expected to grow continuously, and ultra high speed short-reach optical fiber transmission is in serious needs. In the recent high-speed 400GbE, four-level pulse amplitude modulation (PAM-4) is introduced with very high modulation speed of 53 Gbaud to achieve 100Gbit/s/. In near future, the modulation speed is likely to be increased furthermore, and it will leads to transceiver electrical/optical device bandwidth insufficiency. The waveform distortion caused by such bandwidth insufficiency can be canceled by the use of digital equalizers, however it will degrade SNR of the received signal due to the noise enhancement. Therefore, we propose the use of Tomlinson-Harashima Precoding for IM/DD PAM signaling, which is immune to the noise enhancement. On the other hand, transmitter-side device non-linearity from a DAC, an RF driver, an optical modulator, is the another source of noise enhancement which cannot be compensated by receiver-side DSP. The transmitter-side non-linearity compensator (NLC) is an effective solution to it, however, its implementation in THP-PAM transceiver is not straight forward, due to Modulo operation in a THP encoder. In this paper, we investigate two implementations of Tx-side NLC for THP-PAM signaling, analytical one and look-up-table based one. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Optical Fiber Transmission / multilevel / PAM / IM/DD / Non-linearity Compensation / / / |
Reference Info. |
IEICE Tech. Rep., vol. 120, no. 388, PN2020-43, pp. 10-14, March 2021. |
Paper # |
PN2020-43 |
Date of Issue |
2021-02-22 (PN) |
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) |
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PN2020-43 |
Conference Information |
Committee |
PN |
Conference Date |
2021-03-01 - 2021-03-02 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Online |
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(See Japanese page) |
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Registration To |
PN |
Conference Code |
2021-03-PN |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Transmitter Nonlinearity Compensator for Short-Reach IM/DD PAM Signalling with Tomlinson-Harashima Precoding (THP) |
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Optical Fiber Transmission |
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multilevel |
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PAM |
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IM/DD |
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Non-linearity Compensation |
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Nobuhiko Kikuchi |
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Hitachi Ltd. (Hitachi) |
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Speaker |
Author-1 |
Date Time |
2021-03-01 14:05:00 |
Presentation Time |
25 minutes |
Registration for |
PN |
Paper # |
PN2020-43 |
Volume (vol) |
vol.120 |
Number (no) |
no.388 |
Page |
pp.10-14 |
#Pages |
5 |
Date of Issue |
2021-02-22 (PN) |
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