公开(公告)号：US10833770B2

公开(公告)日：2020-11-10

申请号：US16449319

申请日：2019-06-21

Applicant: NEC Laboratories America, Inc.

Inventor： Shaoliang Zhang ,  Fatih Yaman ,  Eduardo Rodriguez ,  Yoshihisa Inada ,  Kohei Nakamura ,  Takanori Inoue

IPC: H04B10/2543 ,  G06K9/62 ,  H04L27/26 ,  G06N3/08 ,  H04B10/2531 ,  H04B10/61 ,  H04L27/20 ,  H04B10/40 ,  H04B10/50 ,  H04B10/60

Abstract: Aspects of the present disclosure describe systems, methods and structures for optical fiber nonlinearity compensation using neural networks that advantageously employ machine learning (ML) algorithms for nonlinearity compensation (NLC) that advantageously provide a system-agnostic model independent of link parameters, and yet still achieve a similar or better performance at a lower complexity as compared with prior-art methods. Systems, methods, and structures according to aspects of the present disclosure include a data-driven model using the neural network (NN) to predict received signal nonlinearity without prior knowledge of the link parameters. Operationally, the NN is provided with intra-channel cross-phase modulation (IXPM) and intra-channel four-wave mixing (IFWM) triplets that advantageously provide a more direct pathway to underlying nonlinear interactions.

公开(公告)号：US10708094B2

公开(公告)日：2020-07-07

申请号：US16153051

申请日：2018-10-05

Applicant: NEC Laboratories America, Inc. ,  NEC Corporation

Inventor： Fatih Yaman ,  Shaoliang Zhang ,  Eduardo Mateo Rodriguez ,  Yoshihisa Inada ,  Yue-Kai Huang ,  Weiyang Mo

IPC: H04L25/03 ,  G06N3/08 ,  H04B10/079 ,  H04B10/2513 ,  H04B10/2507 ,  H04B10/69

Abstract: Systems and methods for transmission filtering are provided. A receiver includes an input coupled to a transmission line to receive distorted optical symbols. A distortion filter is coupled to the input to replace the distorted optical symbols with predicted symbols using a trained neural network. A decoder is coupled to the distortion filter to decode the predicted symbols.

公开(公告)号：US10401564B2

公开(公告)日：2019-09-03

申请号：US16155787

申请日：2018-10-09

Applicant: NEC Laboratories America, Inc.

Inventor： Fatih Yaman ,  Shaoliang Zhang ,  Eduardo Mateo Rodriguez ,  Takanori Inoue ,  Kohei Nakamura ,  Yoshihisa Inada ,  Takaaki Ogata

IPC: G02B6/02 ,  G02B6/036 ,  H04B10/2569 ,  G02B6/38

Abstract: Aspects of the present disclosure describe fiber nonlinearity induced transmission penalties are reduced both in fibers with large polarization-mode dispersion, and in coupled-core multicore fibers (CC-MCF). In the case of coupled multi-core fibers, the requirement for modal delay is less.

公开(公告)号：US10291318B2

公开(公告)日：2019-05-14

申请号：US15964790

申请日：2018-04-27

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan Djordjevic ,  Shaoliang Zhang ,  Ting Wang

IPC: H04B10/00 ,  H04B10/112 ,  H03M13/11 ,  H04L1/00 ,  H04L27/36 ,  H03M13/25 ,  G02B6/028 ,  H04B10/11 ,  H04B10/516 ,  H04L29/06 ,  H04J14/00 ,  H04B10/2581 ,  H04J14/04

Abstract: Aspects of the present disclosure describe physical layer security in optical communications wherein Bessel modes are employed and significantly outperform conventional schemes with respect to secrecy and advantageously benefit from atmospheric turbulence effects with beam splitting attacks.

公开(公告)号：US10236989B2

公开(公告)日：2019-03-19

申请号：US15729021

申请日：2017-10-10

Applicant: NEC Laboratories America, Inc. ,  NEC Corporation

Inventor： Shaoliang Zhang ,  Fatih Yaman ,  Eduardo Mateo Rodriguez ,  Yoshihisa Inada

IPC: H04B10/54 ,  H04Q11/00 ,  H04B10/079 ,  H04B10/516 ,  H04B10/532

Abstract: Systems and methods for data transport in an optical communications system, including generating a pairwise optimized (PO) multi-dimensional signal constellation in a single stage. The PO multi-dimensional signal constellation is generated by selecting a pair of symbols from a received constellation with M symbols, defining and minimizing an objective function with one or more constraints to optimize the selected pair of symbols, and iteratively selecting and optimizing one or more different pairs of symbols from the received constellation until a threshold condition is reached. Neighbor symbols from the generated PO multi-dimensional signal constellation in each polarization are clustered to formulate a clustered PO multi-dimensional signal constellation, and data is modulated and transmitted in accordance with the clustered PO multi-dimensional signal constellation.

公开(公告)号：US10205591B2

公开(公告)日：2019-02-12

申请号：US15897944

申请日：2018-02-15

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan Djordjevic ,  Ting Wang ,  Shaoliang Zhang

IPC: H04L9/08 ,  H04B10/70 ,  H04J14/02 ,  H01Q3/34 ,  H01Q21/00 ,  H04L27/36 ,  H04L27/38 ,  H04B7/0413 ,  H04L27/34 ,  H04B10/11 ,  H01Q3/26 ,  H01Q3/28 ,  H01Q3/38

Abstract: Systems and methods for orbital angular momentum (OAM)-based multidimensional signaling with multiple-input-multiple-output (MIMO). The wireless communication is achieved using a transmitter including a plurality of orthogonal pulse shapers of a multidimensional modulator, the plurality of orthogonal pulse shapers generating a multidimensional modulated signal by imposing one or more data sequences on corresponding mutually orthogonal filter impulse responses derived from multiple orthogonal basis functions including Slepian sequences. An OAM antenna array including OAM antenna elements is used such that each of the OAM antenna elements includes an azimuthal phase shifter for shifting an azimuthal phase term of a wavefront generated by an antenna element such that the OAM antenna elements impose the multidimensional modulated signal on pre-determined OAM modes of a carrier signal corresponding to the azimuthal phase term.

公开(公告)号：US20180234139A1

公开(公告)日：2018-08-16

申请号：US15897944

申请日：2018-02-15

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan Djordjevic ,  Ting Wang ,  Shaoliang Zhang

IPC: H04B7/0413 ,  H04L27/38 ,  H04L27/36 ,  H04L27/34

CPC classification number: H04B7/0413 ,  H01Q3/26 ,  H01Q3/28 ,  H01Q3/34 ,  H01Q3/38 ,  H01Q21/00 ,  H04B10/11 ,  H04B10/505 ,  H04B10/516 ,  H04B10/70 ,  H04J14/0227 ,  H04J14/0298 ,  H04J14/04 ,  H04L9/0852 ,  H04L27/3477 ,  H04L27/36 ,  H04L27/362 ,  H04L27/38

Abstract: Systems and methods for orbital angular momentum (OAM)-based multidimensional signaling with multiple-input-multiple-output (MIMO). The wireless communication is achieved using a transmitter including a plurality of orthogonal pulse shapers of a multidimensional modulator, the plurality of orthogonal pulse shapers generating a multidimensional modulated signal by imposing one or more data sequences on corresponding mutually orthogonal filter impulse responses derived from multiple orthogonal basis functions including Slepian sequences. An OAM antenna array including OAM antenna elements is used such that each of the OAM antenna elements includes an azimuthal phase shifter for shifting an azimuthal phase term of a wavefront generated by an antenna element such that the OAM antenna elements impose the multidimensional modulated signal on pre-determined OAM modes of a carrier signal corresponding to the azimuthal phase term.

公开(公告)号：US20180109067A1

公开(公告)日：2018-04-19

申请号：US15586209

申请日：2017-05-03

Applicant: NEC Laboratories America, Inc.

Inventor： Fatih Yaman ,  Shaoliang Zhang ,  Eduardo Mateo Rodriquez ,  Takanori Inoue ,  Yoshihisa Inada ,  Takaaki Ogata

IPC: H01S3/094 ,  H01S3/067

CPC classification number: H01S3/094053 ,  G02B6/12002 ,  G02B6/2804 ,  H01S3/06729 ,  H01S3/06737 ,  H01S3/06754 ,  H01S3/094003 ,  H01S3/094019 ,  H01S3/094038 ,  H01S3/094069 ,  H01S3/1608

Abstract: An optical communication substrate includes a plurality of cores to communicate optical signals; a rectangular input delivering a pump laser, and a shaped portion to combine the optical signals and the pump laser into a ring geometry at an output.

公开(公告)号：US20180102626A1

公开(公告)日：2018-04-12

申请号：US15724755

申请日：2017-10-04

Applicant: NEC Laboratories America, Inc.

Inventor： Ezra Ip ,  Yue-Kai Huang ,  Fatih Yaman ,  Shaoliang Zhang

IPC: H01S3/23 ,  H01S3/094 ,  H04B10/291 ,  H04B10/293

CPC classification number: H01S3/2316 ,  H01S3/06708 ,  H01S3/06737 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/094003 ,  H01S3/094011 ,  H01S3/094019 ,  H01S3/094053 ,  H01S3/1608 ,  H01S3/302 ,  H04B10/2912 ,  H04B10/2916 ,  H04B10/2935

Abstract: An unrepeatered transmission system includes a receiver coupled to a receive span; a transmitter coupled to the receive span; and a plurality of cascaded amplifiers in the receive span with dedicated fiber cores to supply one or more optical pumps from the receiver to each amplifier, wherein the plurality of cascaded amplifiers increase system reach by increasing the length of a back span in an unrepeatered link.

公开(公告)号：US09819530B2

公开(公告)日：2017-11-14

申请号：US15079848

申请日：2016-03-24

Applicant: NEC Laboratories America, Inc.

Inventor： Fatih Yaman ,  Shaoliang Zhang ,  Eduardo Mateo Rodriquez ,  Yoshihisa Inada ,  Takaaki Ogata ,  Takanori Inoue

IPC: H04L27/36 ,  H04L27/34

CPC classification number: H04L27/362 ,  H04L27/34 ,  H04L27/3405 ,  H04L27/3444 ,  H04L27/36

Abstract: Methods and systems for communication with an optimized constellation include coding an input data stream to a symbol stream according to an optimized constellation that has a non-Gray bit mapping and that has neighboring points having more than one bit difference farther apart than neighboring points having one bit difference. The symbol stream is modulated onto a transmission signal and subsequently demodulated at a receiver to produce a received symbol stream. The received symbol stream is decoded to a bitstream according to an optimized constellation that has a non-Gray bit mapping and that has neighboring points having more than one bit difference farther apart than neighboring points having one bit difference.