公开(公告)号：US12191913B2

公开(公告)日：2025-01-07

申请号：US17709975

申请日：2022-03-31

Applicant: Nokia Solutions and Networks Oy

Inventor： Patrick Iannone ,  Roland Ryf ,  Rene-Jean Essiambre

IPC: H04B10/548

Abstract: An apparatus includes an optical PSK transmitter configured to output carrier-suppressed optical signal phase-modulated according to a M-PSK constellation without substantial amplitude modulation. The apparatus includes an optical phase modulator, a driver configured to drive the modulator with a PAM-N electrical signal, N>M, and a signal encoder configured to map an input bit stream to the PAM-N electrical signal.

公开(公告)号：US20230318714A1

公开(公告)日：2023-10-05

申请号：US17709975

申请日：2022-03-31

Applicant: Nokia Solutions and Networks Oy

Inventor： Patrick Iannone ,  Roland Ryf ,  Rene-Jean Essiambre

IPC: H04B10/548

CPC classification number: H04B10/548

Abstract: An apparatus includes an optical PSK transmitter configured to output carrier-suppressed optical signal phase-modulated according to a M-PSK constellation without substantial amplitude modulation. The apparatus includes an optical phase modulator, a driver configured to drive the modulator with a PAM-N electrical signal, N>M, and a signal encoder configured to map an input bit stream to the PAM-N electrical signal.

公开(公告)号：US10601521B2

公开(公告)日：2020-03-24

申请号：US15979376

申请日：2018-05-14

Applicant: Nokia Solutions and Networks Oy

Inventor： Rene-Jean Essiambre ,  Roland Ryf ,  Muralidharan Kodialam

IPC: H04B10/516 ,  H04B10/61 ,  H04J14/06

Abstract: An optical data receiver includes optical hybrids, light detectors and a digital signal processor. Each optical hybrid outputs mixtures of a corresponding one of the polarization components of a received data-modulated optical carrier with reference light. Each light detector outputs digital measurements of the mixtures from a corresponding one of the optical hybrids. The digital signal processor identifies data symbols of a constellation having parts transmitted on both polarization components of the data-modulated optical carrier responsive to receipt of the digital measurements. The transmitted data-modulated optical carrier has about a same total light intensity in each modulation time slot thereof. Each data symbol is defined by in-phase and quadrature-phase electric field coordinates of both polarization components. Pairs of in-phase and quadrature-phase electric coordinates of each of the polarization components are on a preselected set of one or more concentric circles about an origin. The constellation has 4D dimensions, D being an integer.

公开(公告)号：US11309972B2

公开(公告)日：2022-04-19

申请号：US17025353

申请日：2020-09-18

Applicant: Nokia Solutions and Networks OY

Inventor： Juan Ignacio Bonetti ,  Rene-Jean Essiambre ,  Muralidharan Kodialam

IPC: H04B10/25 ,  H04B10/516 ,  H04J14/06 ,  H04B10/564 ,  H04B10/61

Abstract: A machine-implemented method of constructing multidimensional constellations having increased minimum distances between the constellation symbols thereof compared to those of comparable conventional constellations, e.g., QPSK and QAM constellations. An example multidimensional constellation so constructed may have eight or more dimensions and may be mapped onto degrees of freedom selected from, e.g., time, space, wavelength, polarization, and the in-phase and quadrature-phase components, of the optical field. The disclosed method is beneficially used to generate multidimensional modulation formats characterized by constant total optical transmit power per modulation time slot and/or applicable to the transmission of multidimensional constellation symbols having separate parts thereof primarily carried by different respective guided modes of the optical fiber. Example methods and apparatus for implementing such multidimensional modulation formats are also disclosed herein.

公开(公告)号：US20210091858A1

公开(公告)日：2021-03-25

申请号：US17025353

申请日：2020-09-18

Applicant: Nokia Solutions and Networks OY

Inventor： Juan Ignacio Bonetti ,  Rene-Jean Essiambre ,  Muralidharan Kodialam

IPC: H04B10/516 ,  H04J14/06 ,  H04B10/61 ,  H04B10/25 ,  H04B10/564

Abstract: A machine-implemented method of constructing multidimensional constellations having increased minimum distances between the constellation symbols thereof compared to those of comparable conventional constellations, e.g., QPSK and QAM constellations. An example multidimensional constellation so constructed may have eight or more dimensions and may be mapped onto degrees of freedom selected from, e.g., time, space, wavelength, polarization, and the in-phase and quadrature-phase components, of the optical field. The disclosed method is beneficially used to generate multidimensional modulation formats characterized by constant total optical transmit power per modulation time slot and/or applicable to the transmission of multidimensional constellation symbols having separate parts thereof primarily carried by different respective guided modes of the optical fiber. Example methods and apparatus for implementing such multidimensional modulation formats are also disclosed herein.