公开(公告)号：US10917170B2

公开(公告)日：2021-02-09

申请号：US16091787

申请日：2017-03-23

Applicant: Xieon Networks S.à.r.l.

Inventor： Danish Rafique ,  Stefano Calabró

IPC: H04B10/50 ,  H04B10/516 ,  H04J14/02 ,  H04B10/079 ,  H04L27/34 ,  H04L5/00 ,  H03M13/25 ,  H04L27/36 ,  H04L1/00 ,  H04J14/06

Abstract: Disclosed herein is a method for transmitting digital data in a super channel, in which a set of carriers are packed in a predetermined bandwidth. The set of carriers comprises higher and lower edge carriers having the highest and lowest wavelengths, respectively, among said set of earners, wherein data is transmitted via the higher and lower edge carriers using a corresponding modulation format, each modulation format using a constellation diagram comprising a number of symbols, wherein a binary address is associated with each symbol. Said method comprises the steps of: separating digital data to be transmitted via each of said higher and lower edge carriers into corresponding first and second data streams, and for each of said higher and lower edge carriers, mapping the data of the first data stream to predetermined first bit positions within the binary symbol addresses and the data of the second data stream to predetermined second bit positions within the binary symbol addresses, wherein said first bit positions are bit positions which have an error probability less than the average error probability of all bit positions.

公开(公告)号：US11296796B2

公开(公告)日：2022-04-05

申请号：US16286147

申请日：2019-02-26

Applicant: Xieon Networks S.à.r.l.

Inventor： Alessandro Bianciotto ,  Stefano Calabró ,  Maxim Kuschnerov ,  Mahdi Mezghanni ,  Antonio Napoli ,  Bernhard Spinnler

IPC: H04B10/588 ,  H04B10/50 ,  H04B10/079 ,  H04B10/61 ,  G02F1/225 ,  G02F1/21

Abstract: Disclosed herein is a dual parallel Mach-Zehnder-modulator (DPMZM) device comprising a DPMZM 10 having first and second inner MZMs arranged parallel to each other. The first inner MZM generates an in-phase component EI of an optical signal in response to a first driving voltage VI, and the second inner MZM generates a quadrature component EQ of said optical signal in response to a second driving voltage VQ. Further disclosed is a calculation unit 52 configured for receiving an in-phase component yI and a quadrature component yQ of a desired base-band signal, and for calculating pre-distorted first and second driving voltages VI, VQ. The calculation of the pre-distorted first and second driving voltages VI, VQ is based on a model of said DPMZM 10 accounting for I-Q cross-talk, and using an algorithm that determines said first and second driving voltages VI, VQ each as a function of both of said in-phase and quadrature components yI, yQ of said base-band signal.

公开(公告)号：US11190306B2

公开(公告)日：2021-11-30

申请号：US16723462

申请日：2019-12-20

Applicant: Xieon Networks S.à.r.l.

Inventor： Stefano Calabró

IPC: H04L1/20 ,  H04B10/079 ,  H04L1/00

Abstract: A system for determining a channel margin of a data transmission channel (DTC) using error correction under real-world channel conditions is described. The system includes a monitoring unit, an operating state determining unit and a data processing unit. The monitoring unit monitors data transmission along the DTC and estimates a statistical distribution of errors (H) in the transmission of data. The operating state determining unit determines a current value of an operating state parameter for the DTC. The data processing unit determines a reference channel margin associated with said current value of the operating state parameter for a reference channel and the error correction scheme employed, provides a statistical distribution of errors (HR) associated with said reference channel for said current value of said operating state parameter, compute a deviation of H and HR, and computes a reduction of the reference channel margin.