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：US10162245B2

公开(公告)日：2018-12-25

申请号：US15596043

申请日：2017-05-16

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Nan Ji ,  Ting Wang

IPC: G02F1/335 ,  G01D5/353 ,  G02F1/125

Abstract: A sensing system adapted to receive backscattered signal from a sensing fiber includes a first Faraday rotator mirror; a second Faraday rotator mirror; an optical hybrid coupled to the Faraday rotator mirrors, wherein one of the mirrors is coupled with an optical path difference; a 3-port optical circulator coupled to the sensing fiber and the optical hybrid; a first photodetector coupled to the circulator; and three photodetectors coupled to the optical hybrid.

公开(公告)号：US10113935B2

公开(公告)日：2018-10-30

申请号：US14975062

申请日：2015-12-18

Applicant: NEC Laboratories America, Inc.

Inventor： Ting Wang ,  Yi Weng

IPC: G01N21/00 ,  G01M11/00 ,  G02B6/14

Abstract: A method and system are provided. The method includes converting, using a spatial mode converter, an input signal into a plurality of spatial modes and performing polarization multiplexing and mode multiplexing, using a polarization multiplexer and a mode multiplexer, respectively, on the input signal. The method further includes injecting the input signal into a fiber optic medium. The method additionally includes applying, using at least one spatial filter in each of a forward and a backward direction within the fiber optic medium, the plurality of spatial modes within the fiber optic medium to transmit the input signal and perform distributed fault sensing on the input signal simultaneously.

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：US09866346B2

公开(公告)日：2018-01-09

申请号：US15279399

申请日：2016-09-28

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Nan Ji ,  Ting Wang ,  Ryuji Aida

IPC: H04J14/02 ,  H04Q11/00

CPC classification number: H04J14/0212 ,  H04J14/0201 ,  H04J14/021 ,  H04J14/0297 ,  H04Q11/0005 ,  H04Q2011/0015 ,  H04Q2011/0058

Abstract: Aspects of the present disclosure describe systems, structures and methods providing fully reconfigurable optical add-drop multiplexing (ROADM) that provide redundancy protection against any two (2) simultaneous wavelength selective switch (WSS) failures with only four 2×1 WSS structures for both Eastbound and Westbound traffic, while not requiring bidirectional operation of the WSS structures.

公开(公告)号：US20170350734A1

公开(公告)日：2017-12-07

申请号：US15596043

申请日：2017-05-16

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Nan Ji ,  Ting Wang

IPC: G01D5/353 ,  G02F1/125 ,  G02F1/335

CPC classification number: G02F1/335 ,  G01D5/35306 ,  G01D5/35358 ,  G02F1/125

Abstract: A sensing system adapted to receive backscattered signal from a sensing fiber includes a first Faraday rotator mirror; a second Faraday rotator mirror; an optical hybrid coupled to the Faraday rotator mirrors, wherein one of the mirrors is coupled with an optical path difference; a 3-port optical circulator coupled to the sensing fiber and the optical hybrid; a first photodetector coupled to the circulator; and three photodetectors coupled to the optical hybrid.

公开(公告)号：US09813786B2

公开(公告)日：2017-11-07

申请号：US14607075

申请日：2015-01-28

Applicant: NEC Laboratories America, Inc.

Inventor： Neda Cvijetic ,  Akihiro Tanaka ,  Ting Wang

IPC: H04Q11/00 ,  H04J14/02 ,  H04L12/931 ,  H04L12/24 ,  H04L12/26

CPC classification number: H04Q11/0005 ,  H04J14/0256 ,  H04J14/0284 ,  H04L41/12 ,  H04L43/0811 ,  H04L49/00 ,  H04Q11/0062 ,  H04Q11/0067

Abstract: A method includes providing run-time optical 5G mobile fronthaul MFH topology re-configurability through software-defined control of both optical circuit switches and electrical packet switches readily accommodating unpredictable traffic patterns and low latency optical by-pass based device-to-device connectivity. The providing includes employing an optical any-to-any switch for wavelength-tunable and fixed-wavelength optical transceivers.

公开(公告)号：US09813158B2

公开(公告)日：2017-11-07

申请号：US15131307

申请日：2016-04-18

Applicant: NEC Laboratories America, Inc.

Inventor： Giovanni Milione ,  Ezra Ip ,  Ting Wang

IPC: H04B10/00 ,  H04B10/2581 ,  H04Q11/00 ,  H04B10/50 ,  H04B10/40 ,  H04B10/516 ,  H04J14/00

CPC classification number: H04B10/2581 ,  H04B10/40 ,  H04B10/503 ,  H04B10/516 ,  H04J14/00 ,  H04Q11/0005 ,  H04Q2011/0015

Abstract: Methods and system for transmitting data includes converting multiple optical beams to distinct respective spatial modes. Data is modulated onto each of the optical beams. The optical beams are combined into a single transmission beam. The transmission beam is launched onto a multimode optical fiber having an elliptical core.

公开(公告)号：US20170211937A1

公开(公告)日：2017-07-27

申请号：US15403615

申请日：2017-01-11

Applicant: NEC Laboratories America, Inc.

Inventor： Junqiang Hu ,  Ting Wang

IPC: G01C21/00 ,  G01S5/02 ,  G01C21/20

CPC classification number: G01C21/005 ,  G01C21/206 ,  G01S5/0289 ,  G01S5/14 ,  G01S13/89 ,  G01S15/89 ,  G01S17/89

Abstract: An in-door positioning system for a building includes three or more external positioning devices (EPDs), wherein the EPD is capable of calculating the distance between each other; a floor plan module with a floor plan map of the building, for a building level of interest; and relative positions of the EPDs; and an indoor positioning device positioned at a predetermined distance to each of the EPDs.

公开(公告)号：US20170199093A1

公开(公告)日：2017-07-13

申请号：US14957592

申请日：2015-12-02

Applicant: NEC Laboratories America, Inc.

Inventor： Ting Wang ,  Yi Weng

IPC: G01L1/24 ,  G01D5/353 ,  G01K11/32 ,  G02B6/34 ,  G02B6/32

CPC classification number: G01L1/246 ,  G01D5/35316 ,  G01K11/3206 ,  G02B6/02133 ,  G02B6/02138 ,  G02B6/32 ,  G02B6/34

Abstract: A sensor system includes a femtosecond infrared (fs-IR) laser to generate a laser beam; a reflecting mirror optically receiving the laser beam; a lens optically coupled to the reflecting mirror to focus the laser beam; a phase mask receiving the laser beam from the lens to generate an index modulated pattern; and a few-mode fiber (FMF) receiving the index modulated pattern.