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

Author

Koike-Akino, Toshiaki ; Kojima, Keisuke ; Millar, David S. ; Parsons, Kieran ; Kametani, Soichiro ; Sugihara, Takashi ; Yoshida, Tsuyoshi ; Ishida, Kazuyuki ; Miyata, Yoshikuni ; Matsumoto, Wataru ; Mizuochi, Takashi

Author_Institution

Mitsubishi Electr. Res. Labs., Cambridge, MA, USA

Volume

33

Issue

7

fYear

2015

fDate

April1, 1 2015

Firstpage

1292

Lastpage

1299

Abstract

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.

Keywords

Nyquist criterion; adjacent channel interference; channel allocation; channel coding; channel spacing; decoding; interference suppression; optical transmitters; wireless channels; Han-Kobayashi superposition coding; ICI cancellation; ICI precancelation; channel allocation; dirty-paper coding; high-speed superchannel optical communication; higher spectrum efficiency; joint decoding; nonnegligible interchannel interference; spectrum efficiency; subNyquist channel spacing; subchannel transmitter; superchannel transmission; Channel spacing; Decoding; Encoding; Interference; Joints; Noise; Receivers; Dirty-paper coding; Han–Kobayashi coding; Han???Kobayashi coding; Superchannel optical communications; dirty–paper coding; joint decoding; superchannel optical communications;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2015.2397435

Filename

7029057