公开(公告)号：US10256841B2

公开(公告)日：2019-04-09

申请号：US15533912

申请日：2015-12-18

Applicant: Xieon Networks S.à.r.l.

Inventor： Heinrich Von Kirchbauer ,  Stephan Witte ,  Stefano Calabro ,  Bernhard Spinnler

IPC: H03M13/29 ,  H03M13/11 ,  H03M13/27

Abstract: An encoder encodes digital data, said encoder includes one or more component encoders, one or more interconnections between component encoders, one or more inputs and one or more outputs. The encoder is configured to carry out the following steps: combining internal input bits received via an interconnection and external input bits received via a corresponding input, to assemble a local information word, encoding the local information word such as to generate a local code word, outputting a reduced local code word and handling the same reduced local code word over to the interconnect for forwarding the same reduced local code word to another component encoder or to itself, wherein the encoder is configured to forward on each interconnect the bits of the reduced local code in parallel but with delays that are mutually different for at least a subset of the reduced local code word bits.

公开(公告)号：US10263708B2

公开(公告)日：2019-04-16

申请号：US15119072

申请日：2015-03-12

Applicant: Xieon Networks S.à.r.l.

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

IPC: H04B10/588 ,  G02F1/225 ,  H04B10/61 ,  H04B10/079 ,  H04B10/50 ,  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：US20210184775A1

公开(公告)日：2021-06-17

申请号：US16647370

申请日：2018-09-14

Applicant: Xieon Networks S.à.r.l.

Inventor： Stefano Calabro ,  Lutz Rapp ,  Bernhard Spinnler

IPC: H04B10/58 ,  H04B10/2507 ,  H04B10/564

Abstract: A method for determining a model representation for an optical transmitter comprises determining a quantity of a subsequence of output signals of an optical transmitter, the output signals being emitted in response to a sequence of input signals provided to the optical transmitter, and determining a model representation for the optical transmitter based on the determined quantity, wherein the quantity only represents a part of the information encoded in the subsequence of the output signals.

公开(公告)号：US10313049B2

公开(公告)日：2019-06-04

申请号：US15578543

申请日：2016-06-29

Applicant: Xieon Networks S.à.r.l.

Inventor： Stefano Calabro ,  Bernhard Spinnler

IPC: H04J14/06 ,  H04B10/61 ,  H04B7/0413 ,  H04B10/69 ,  H04B10/2569

Abstract: The present invention relates to signal processing in an optical receiver, in particular to equalization performed in coherent optical receivers. A multiple-input multiple-output (MIMO) equalizer receives and equalizes a plurality of real value signals, for example four sampled electrical baseband tributaries (HI, HQ, VI, VQ). The outputs of the multiple-input multiple-output (MIMO) equalizer provide equalized real or imaginary components of complex signals. The complex signals including the real and imaginary components are then each and individually equalized to remove chromatic dispersion.

公开(公告)号：US10181904B2

公开(公告)日：2019-01-15

申请号：US15507120

申请日：2015-07-09

Applicant: Xieon Networks S.à.r.l.

Inventor： Miguel Drummond ,  Bernhard Spinnler ,  Stefano Calabro

IPC: H04B10/2507 ,  H04B10/69 ,  H04B10/2513

Abstract: The present invention relates to performing chromatic dispersion estimation in a receiver of an optical communication system. Here, the signal received by the receiver includes frames, each comprising a training portion and a data portion. The training portion comprises a plurality of identical pattern sequences. Different settings are applied to an equalizer to generate a plurality of equalized signals from at least one of the received frames. Then, at least one correlation value is calculated between a first pattern sequence and a second pattern sequence of the equalized signals and a final correlation value is derived from the respective correlation values. The setting of the equalizer corresponding to the equalized signal providing the highest final correlation value is selected to provide the chromatic dispersion estimation.

公开(公告)号：US10038516B2

公开(公告)日：2018-07-31

申请号：US15529027

申请日：2015-12-02

Applicant: Xieon Networks S.à.r.l.

Inventor： Stefano Calabro ,  Bernhard Spinnler

IPC: H04B10/00 ,  H04J14/06 ,  G02F1/225 ,  H04B10/50 ,  G02F1/21

CPC classification number: H04J14/06 ,  G02F1/0123 ,  G02F1/2255 ,  G02F2001/212 ,  G02F2201/58 ,  G02F2203/07 ,  H04B10/5053 ,  H04B10/50572

Abstract: Disclosed herein is a modulator (50) for polarization-division multiplexing (PDM) transmission. The modulator (50) comprises first and second DP-MZMs (12, 28) associated with first and second polarizations, each DP-MZM (12, 28) having an input for an in-phase and a quadrature driving signal for modulating the in-phase and quadrature components of an optical signal according to respective transfer functions, and a detector (58) suitable for detecting light comprising at least a portion of the light outputted by the first DP-MZM (12) and a portion of the light outputted by the second DP-MZM (28). The modulator (50) is adapted to superimpose a first pilot signal on one of the in-phase and quadrature driving signals of the first DP-MZM (12) and on one of the in-phase and quadrature driving signals of the second DP-MZM (28), and a second pilot signal on the respective other of the in-phase and quadrature driving signals of the first and second DP-MZMs (12, 28). Further, the first and second pilot signals are chosen such that the signal detected by said detector (58) is indicative as to whether the slopes of the transfer functions are different for the in-phase and quadrature components of one of the first and second DP-MZMs (12, 28) and identical for the other of the first and second DP-MZMs (12, 28).