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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.
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.
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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.
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63.发明授权公开(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
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.
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64.发明申请公开(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
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.
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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.
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Patent Agency Ranking
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.
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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
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.
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68.发明申请公开(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.
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.
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69.发明授权公开(公告)号：US09654246B2
公开(公告)日：2017-05-16
申请号：US14938771
申请日：2015-11-11
Applicant: NEC Laboratories America, Inc.
Inventor： Philip Nan Ji , Ryuji Aida , Ting Wang
IPC: H04J14/02
CPC classification number: H04J14/0212 , H04J14/0204 , H04J14/0205 , H04J14/0216 , H04J14/0221
Abstract: A reconfigurable optical add/drop multiplexer (ROADM) unit includes a first optical circulator coupled to a first terminal; a second optical circulator coupled to a second terminal; a third optical circulator coupled to a third terminal; a fourth optical circulator coupled to a fourth terminal; a first wavelength-selective switch (WSS), coupled to the first, second, and third optical circulators; a second WSS coupled to the first, second, and fourth optical circulators, wherein the first and second WSSes are bidirectional operated; a first 1:2 coupler positioned between the first circulator and the first and second WSSes; a second 1:2 coupler positioned between the second circulator and the first and second WSSes.
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公开(公告)号：US09479446B2
公开(公告)日：2016-10-25
申请号：US14479398
申请日：2014-09-08
Applicant: NEC Laboratories America, Inc.
Inventor： Junqiang Hu , Konstantinos Kanonakis , Ting Wang , Philip Ji
IPC: H04J3/16 , H04J14/00 , H04L12/825 , H04B10/40 , H04Q11/00 , H04L12/815
CPC classification number: H04L47/25 , H04B10/40 , H04L47/225 , H04Q11/0062 , H04Q2011/0086
Abstract: Methods and systems for variable rate control include determining a new communications rate in response to measured data traffic patterns. A receive change message is transmitted to a receiver that triggers the receiver to wait for an end of transmission (EoT) message and to set a new communications rate. A transmit change message is transmitted to a transmitter that triggers the transmitter to send the EoT message to the receiver, to set the new communications rate, and to send a start of transmission (SoT) message to the receiver before resuming data communications.
Abstract translation: 用于可变速率控制的方法和系统包括响应于测量的数据业务模式来确定新的通信速率。 接收改变消息被发送到触发接收机等待传输结束（EoT）消息并设置新的通信速率的接收机。 发送改变消息被发送到发射机，触发发射机向接收机发送EoT消息，设置新的通信速率，并在恢复数据通信之前向接收机发送开始的发送（SoT）消息。
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