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Distance-adaptive modulation for space-division multiplexed optical systems

Grant number: 17/25537-8
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): June 01, 2018
Effective date (End): January 08, 2023
Field of knowledge:Engineering - Electrical Engineering - Telecommunications
Principal researcher:Darli Augusto de Arruda Mello
Grantee:Ruby Stella Bravo Ospina
Home Institution: Faculdade de Engenharia Elétrica e de Computação (FEEC). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated research grant:15/24341-7 - New strategies to confront with the threat of capacity exhaustion, AP.TEM
Associated scholarship(s):18/25414-6 - Channel Estimation in Optical Systems with Space-Division Multiplexing, BE.EP.DR


The evolution of the demand for inter- and intra-datacenter data traffic requires solutions of fiber-optic communication systems that are energy efficient, maintaining the trend of reducing the cost per transmitted bit. Space-Division Multiplexing (SDM) is a promising solution, if not the only one, capable of meeting these requirements. In this technique, distinct signals are simultaneously transmitted in different spaces using bundles of single-mode optical fibers in a cable, multi-core fibers or multimode fibers. As a long-term option, spatial multiplexing with channel coupling is of particular interest, whether in multicore fibers with coupled cores or with multimode fibers. In these systems, Multiple-In Multiple-Out (MIMO) digital signal processing techniques are required, which, however, increases the computational complexity of the transceivers. As in today's flexible optical systems, future SDM systems must adapt to the reach of the transmission link. For this, channel estimation techniques and decision making are required to adapt the modulation formats and the digital signal processing algorithms in the transmitter and receiver. In this scenario, this thesis aims to investigate channel estimation techniques in SDM systems with modal coupling, as well as the adaptation of the underlying modulation and digital signal processing algorithms. We will also evaluate the interest in the dissemination of physical layer parameters to upper layers, aiming at a future integration of the transceiver to the control plane. The work will include computational simulations and possibly experimental measurements in partner laboratories. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
OSPINA, RUBY S. B.; VAN DEN HOUT, MENNO; ALVARADO-ZACARIAS, JUAN CARLOS; ANTONIO-LOPEZ, JOSE ENRIQUE; BIGOT-ASTRUC, MARIANNE; CORREA, ADRIAN AMEZCUA; SILLARD, PIERRE; AMEZCUA-CORREA, RODRIGO; OKONKWO, CHIGO; MELLO, DARLI A. A.. Mode-Dependent Loss and Gain Estimation in SDM Transmission Based on MMSE Equalizers. Journal of Lightwave Technology, v. 39, n. 7, p. 1968-1975, . (18/14026-5, 15/24517-8, 17/25537-8, 15/24341-7, 18/25414-6)

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