Han-Kobayashi and Dirty-Paper Coding for Superchannel Optical Communications

Superchannel transmission is a candidate to realize Tb/s-class high-speed optical communications. In order to achieve higher spectrum efficiency, the channel spacing shall be as narrow as possible. However, densely allocated channels can cause non-negligible inter-channel interference (ICI) especial...

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Veröffentlicht in:Journal of lightwave technology 2015-04, Vol.33 (7), p.1292-1299
Hauptverfasser: Koike-Akino, Toshiaki, Kojima, Keisuke, Millar, David S., Parsons, Kieran, Kametani, Soichiro, Sugihara, Takashi, Yoshida, Tsuyoshi, Ishida, Kazuyuki, Miyata, Yoshikuni, Matsumoto, Wataru, Mizuochi, Takashi
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container_end_page 1299
container_issue 7
container_start_page 1292
container_title Journal of lightwave technology
container_volume 33
creator Koike-Akino, Toshiaki
Kojima, Keisuke
Millar, David S.
Parsons, Kieran
Kametani, Soichiro
Sugihara, Takashi
Yoshida, Tsuyoshi
Ishida, Kazuyuki
Miyata, Yoshikuni
Matsumoto, Wataru
Mizuochi, Takashi
description Superchannel transmission is a candidate to realize Tb/s-class high-speed optical communications. In order to achieve higher spectrum efficiency, the channel spacing shall be as narrow as possible. However, densely allocated channels can cause non-negligible inter-channel interference (ICI) especially when the channel spacing is close to or below the Nyquist bandwidth. In this paper, we consider joint decoding to cancel the ICI in dense superchannel transmission. To further improve the spectrum efficiency, we propose the use of Han-Kobayashi superposition coding. In addition, for the case when neighboring subchannel transmitters can share data, we introduce dirty-paper coding for pre-cancelation of the ICI. We analytically evaluate the potential gains of these methods when ICI is present for sub-Nyquist channel spacing.
doi_str_mv 10.1109/JLT.2015.2397435
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source IEEE Electronic Library (IEL)
subjects Bandwidth
Channel spacing
Channels
Coding
Decoding
dirty-paper coding
Encoding
Gain
Han-Kobayashi coding
High speed
Interference
joint decoding
Joints
Mathematical analysis
Noise
Optical communication
Receivers
Superchannel optical communications
title Han-Kobayashi and Dirty-Paper Coding for Superchannel Optical Communications
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