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Photonics 2017, 4(1), 12; doi:10.3390/photonics4010012

Novel Equalization Techniques for Space Division Multiplexing Based on Stokes Space Update Rule

1
ERC, Huawei Technologies Duesseldorf GmbH, Riesstrasse 25, D-80992 Munich, Germany
2
Technical University of Denmark (DTU), Ørsteds Plads, Build. 358, 2800 Kgs. Lyngby, Denmark
*
Author to whom correspondence should be addressed.
Received: 23 December 2016 / Revised: 12 February 2017 / Accepted: 16 February 2017 / Published: 20 February 2017
(This article belongs to the Special Issue Optical Networks for Communications)
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Abstract

Space division multiplexing (SDM) is a promising technology that aims to overcome the capacity crunch of optical communications. In this paper, we introduce the multiple-input multiple-output (MIMO) Stokes Space Algorithm (SSA) implemented in frequency domain, a novel equalization technique for space division multiplexing (SDM). Although different papers have been published about the SSA and its MIMO implementation, we provide for the first time an analysis of the of the convergence speed and frequency offset of the SSA compared to the least mean square (LMS). SSA algorithm can deal with higher frequency offsets and linewidths than LMS, being suitable for optical communications with higher phase noise. SSA does not need pre-compensation of frequency offset, which can be compensated after equalization without penalties. On the other hand, due to reduced convergence speed, SSA requires longer training sequences than LMS. View Full-Text
Keywords: frequency domain equalization; space division multiplexing; coherent technologies frequency domain equalization; space division multiplexing; coherent technologies
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Vaquero Caballero, F.J.; Pittalà, F.; Goeger, G.; Wang, M.; Ye, Y.; Tafur Monroy, I. Novel Equalization Techniques for Space Division Multiplexing Based on Stokes Space Update Rule. Photonics 2017, 4, 12.

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