公开(公告)号：US20160123877A1

公开(公告)日：2016-05-05

申请号：US14931568

申请日：2015-11-03

Applicant: NEC Laboratories America, Inc.

Inventor： Neda Cvijetic ,  Giovanni Milione ,  Ting Wang

IPC: G01N21/55 ,  G01N21/27 ,  G01N21/21

Abstract: A method and system for remote sensing using optical orbital angular momentum (OAM)-based spectroscopy for object recognition. The method includes applying an OAM state on a light beam to generate an optical OAM spectrum, transmitting the light beam on a remote object, receiving a reflected optical OAM spectrum associated with the remote object, and providing a high resolution image of the remote object based on the reflected optical OAM spectrum.

Abstract translation: 一种使用基于光学轨道角动量（OAM）的光谱进行物体识别的遥感方法和系统。 该方法包括在光束上应用OAM状态以产生光学OAM光谱，将光束传输到远程物体上，接收与远程物体相关联的反射光学OAM光谱，以及提供远程物体的高分辨率图像 在反射光学OAM光谱上。

公开(公告)号：US20160109361A1

公开(公告)日：2016-04-21

申请号：US14842589

申请日：2015-09-01

Applicant: NEC Laboratories America, Inc.

Inventor： Ting Wang ,  Yi Weng

IPC: G01N21/3504 ,  G01N21/27

CPC classification number: G01N21/3504 ,  G01N21/21 ,  G01N21/27 ,  G01N2201/06113

Abstract: A method and system for optical angular momentum (OAM) spectroscopy includes generating a beam of light having a single OAM mode. A first spectrum of the beam of light is detected and the beam of light is passed through a gas to attenuate the beam of light in accordance with a presence and concentration of a respective gas. A second spectrum the beam of light is coherently detected and a difference between the first and second spectrum for the beam of light is analyzed to determine the presence and concentration of the respective gas.

Abstract translation: 用于光学角动量（OAM）光谱的方法和系统包括产生具有单个OAM模式的光束。 检测光束的第一光谱，并且根据相应气体的存在和浓度，检测光束通过气体以衰减光束。 第二个光谱的光束被相干检测，并且分析光束的第一和第二光谱之间的差异，以确定相应气体的存在和浓度。

公开(公告)号：US20160028475A1

公开(公告)日：2016-01-28

申请号：US14808414

申请日：2015-07-24

Applicant: NEC Laboratories America, Inc.

Inventor： Shaoliang Zhang ,  Fatih Yaman ,  Yue-Kai Huang ,  Ting Wang

IPC: H04B10/077 ,  H04B10/564 ,  G02F1/01

CPC classification number: H04B10/0775 ,  G02F1/0123 ,  H04B10/50575 ,  H04B10/564 ,  H04B2210/075

Abstract: A system for centralized automatic bias control for a plurality of modulators, including a coupler for coupling output of each of the plurality of modulators to generate a combined modulator output. A pilot insertion device inserts a pilot tone into each of the plurality of modulators such that a different pilot tone frequency is inserted for each of the plurality of modulators. A monitoring device iteratively monitoring power (Pt) of each inserted pilot tone over time to determine whether a current modulator bias is optimal for each of the plurality of modulators, and an adjuster device iteratively adjusts the modulator bias for each of the plurality of modulators for which the current modulator bias is determined to be sub-optimal until a threshold condition has been met.

Abstract translation: 一种用于多个调制器的集中自动偏置控制的系统，包括用于耦合所述多个调制器中的每一个的输出的耦合器以产生组合的调制器输出。 导频插入装置将导频音插入到多个调制器中的每一个中，使得为多个调制器中的每一个插入不同的导频音频率。 一种监测装置，迭代地监视随时间推移的每个插入的导频音的功率（Pt），以确定所述多个调制器中的每个调制器的当前调制器偏置是否最佳，并且调节器装置迭代地调整所述多个调制器中的每一个的调制器偏置，以供 其中电流调制器偏置被确定为次优，直到满足阈值条件。

公开(公告)号：US09203519B2

公开(公告)日：2015-12-01

申请号：US14044298

申请日：2013-10-02

Applicant: NEC Laboratories America, Inc.

Inventor： Fatih Yaman ,  Shaoliang Zhang ,  Ting Wang ,  Yoshihisa Inada ,  Takaaki Ogata ,  Yasuhiro Aoki

IPC: H04L27/20 ,  H04B10/516

CPC classification number: H04B10/5161 ,  H04B10/516

Abstract: The invention is directed to a novel computer implemented method for finding a modulation format that has better receiver sensitivity than modulation formats that are currently being used, with a correlated symbol modulation in which neighboring symbols are coded and decoded together to increase receiver sensitivity.

Abstract translation: 本发明涉及一种用于找到具有比目前使用的调制格式更好的接收机灵敏度的调制格式的新型计算机实现方法，其中相邻符号调制将相邻符号编码并一起解码以增加接收机灵敏度。

公开(公告)号：US09184873B2

公开(公告)日：2015-11-10

申请号：US14218116

申请日：2014-03-18

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B Djordjevic ,  Ting Wang

IPC: H04J14/02 ,  H04L1/00 ,  H04J14/06 ,  H04B10/2581 ,  H04B10/516 ,  H04B10/61 ,  H04J14/04

CPC classification number: H04L1/0043 ,  H04B10/2581 ,  H04B10/516 ,  H04B10/5161 ,  H04B10/61 ,  H04B10/616 ,  H04J14/04 ,  H04J14/06 ,  H04J2203/0089 ,  H04J2211/00 ,  H04L1/0002 ,  H04L1/0041 ,  H04L1/005 ,  H04L1/0058 ,  H04L1/0061

Abstract: Systems and methods for transmitting data, including encoding one or more streams of input data using one or more adaptive Low Density Parity Check (LDPC) encoders, wherein the encoders generate one or more signal constellations; modulate one or more signals using hybrid multidimensional coded modulation; apply orthogonal prolate spheroidal wave functions as electrical basis functions; generate one or more spectral band group signals by selecting and combining two or more spectral band groups with center frequencies that are orthogonal to each other; and spectral-mode-multiplex and transmit the one or more adaptive LDPC-coded data streams including the one or more spectral band group signals combined into corresponding spatial modes over a transmission medium.

Abstract translation: 用于发送数据的系统和方法，包括使用一个或多个自适应低密度奇偶校验（LDPC）编码器编码一个或多个输入数据流，其中所述编码器生成一个或多个信号星座; 使用混合多维编码调制来调制一个或多个信号; 应用正交长椭球波函数作为电气基函数; 通过选择并组合两个或更多个具有彼此正交的中心频率的频谱带组来产生一个或多个频谱组信号; 并且通过传输介质将包括一个或多个频谱组合信号的一个或多个自适应LDPC编码数据流发送到相应的空间模式中进行频谱模式复用。

公开(公告)号：US20150319047A1

公开(公告)日：2015-11-05

申请号：US14699228

申请日：2015-04-29

Applicant: NEC Laboratories America, Inc.

Inventor： Ankitkumar Patel ,  Philip Nan Ji ,  Ting Wang

IPC: H04L12/24 ,  H04J14/02

CPC classification number: H04L41/12 ,  H04J14/0227 ,  H04J14/0257 ,  H04J14/0271 ,  H04L41/22

Abstract: Methods and systems for embedding VI demands in a software-defined network include mapping virtual nodes over physical nodes in a network topology. An auxiliary graph including virtual links between physical nodes that have a residual capacity sufficient to meet a virtual infrastructure demand is constructed. Virtual links over physical links are mapped to maximize use of existing optical channels and to minimize switching of a virtual link between a wavelength division multiplexing layer and an IP layer. New optical channels with a maximum spectral efficiency are established. A set of potential solutions for embedding a set of virtual infrastructure demands is determined. A solution is selected from the set of potential solutions that maximizes a weighted average of spectrum needed to support the set of virtual infrastructure demands and a cost of provisioning the virtual infrastructure demands.

Abstract translation: 用于将VI需求嵌入软件定义网络的方法和系统包括在网络拓扑中的物理节点上映射虚拟节点。 包括具有足以满足虚拟基础设施需求的剩余容量的物理节点之间的虚拟链路的辅助图形被构建。 通过物理链路的虚拟链路被映射以最大限度地利用现有的光通道并且最小化波分复用层和IP层之间的虚拟链路的切换。 建立了具有最大频谱效率的新型光通道。 确定一组用于嵌入一组虚拟基础设施需求的潜在解决方案。 从一组潜在解决方案中选择一种解决方案，最大限度地提高支持一组虚拟基础设施需求所需的频谱加权平均值，以及提供虚拟基础架构需求的成本。

公开(公告)号：US09124369B2

公开(公告)日：2015-09-01

申请号：US14155518

申请日：2014-01-15

Applicant: NEC Laboratories America, Inc.

Inventor： Philip Nan Ji ,  Ting Wang ,  Yoshiaki Aono

IPC: H04B10/40 ,  H04B10/50 ,  H04J14/02 ,  H04Q11/00

CPC classification number: H04B10/40 ,  H04B10/506 ,  H04J14/0298 ,  H04Q11/0005 ,  H04Q2011/0016

Abstract: An optical transceiver including a multi-direction variable transmitter including multiple outputs with different subcarriers being directed to different ones of the outputs to go to different directions in a network, and a multi-direction variable receiver for receiving multiple inputs thereby enabling transmission direction in a network with the transceiver at subcarrier granularity and avoiding entire super-channel granularity and enabling unused subcarriers to be utilized for traffic in other directions or destinations and making switching granularity finer for flexibility in the network.

Abstract translation: 一种包括具有不同子载波的多个输出的多方向可变发射机的光收发器被引导到不同的输出端以进入网络中的不同方向;以及多方向可变接收机，用于接收多个输入，从而使能在 网络与收发器在子载波粒度和避免整个超频道粒度，并使未使用的子载波可用于其他方向或目的地的业务，并使交换粒度更好的网络灵活性。

公开(公告)号：US09106983B2

公开(公告)日：2015-08-11

申请号：US13855384

申请日：2013-04-02

Applicant: NEC Laboratories America, Inc. ,  NEC Corporation

Inventor： Philip N. Ji ,  Ryuji Aida ,  Ting Wang

IPC: H04Q11/00 ,  H04J14/00 ,  H04J14/02 ,  H04L12/28

CPC classification number: H04Q11/0005 ,  H04L12/28 ,  H04Q11/00 ,  H04Q2011/0016

Abstract: Methods and systems for optical communication in a submarine network are provided. An input signal is received from a terminal at a reconfigurable branching unit (BU), and the input signal is split into at least two parts, with one part being associated with one or more trunk terminals and another part being associated with one or more branch terminals. Each of one or more spectrum channels are selected and individually switched to one of a plurality of paths using at least one wavelength selective switch (WSS), with the at least one WSS being configured to transmit the one or more spectrum channels to their respective target output port and to combine signals switched to a specific port into a wavelength division multiplexing (WDM) signal. Individual spectrum channels are filtered out using at least one wavelength blocker (WB).

Abstract translation: 提供了海底网络光通信的方法和系统。 在可重构分支单元（BU）处从终端接收输入信号，并且将输入信号分成至少两部分，其中一部分与一个或多个中继终端相关联，另一部分与一个或多个分支 终端。 使用至少一个波长选择开关（WSS）来选择一个或多个频谱信道中的每一个并且单独地切换到多个路径中的一个，其中所述至少一个WSS被配置为将一个或多个频谱信道发送到它们各自的目标 输出端口并将切换到特定端口的信号组合成波分复用（WDM）信号。 使用至少一个波长阻挡器（WB）滤除各个频谱通道。

公开(公告)号：US09094125B2

公开(公告)日：2015-07-28

申请号：US13901766

申请日：2013-05-24

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

IPC: H04B10/12 ,  H04B10/04 ,  H04B10/06 ,  H04B10/2581 ,  H04B10/516 ,  H04L1/00

CPC classification number: H04B10/2581 ,  H04B10/516 ,  H04L1/0041 ,  H04L5/0008 ,  H04L5/0023 ,  H04L27/3405 ,  H04L27/3422

Abstract: Systems and methods for data transport are provided which encode streams of data using low density parity check (LDPC) encoders and map data streams to symbols, by assigning bits of symbols to a signal constellation and associating bits with constellation points. Constellation points are generated using a D-dimensional optimum signal constellation design (OSCD) method. The OSCD determines an optimum source distribution for an optical channel, generates D-dimensional training sequences from the optimum source distribution, determines new signal constellation points as the center of mass for each D-dimensional cluster of points, and repeats these steps until convergence or until a predetermined number of iterations is reached. Coordinates obtained by the D-dimensional OSCD method are stored in a look-up-table (LUT), points are selected from the LUT using encoded data streams, coordinates are input into a D-dimensional modulator after digital-to-analog conversion (DAC), and a modulated signal is transmitted over an optical medium.

Abstract translation: 提供了用于数据传输的系统和方法，其通过使用低密度奇偶校验（LDPC）编码器将数据流编码并将数据流映射到符号，通过将符号的位分配给信号星座并将比特与星座点相关联。 使用D维最佳信号星座设计（OSCD）方法生成星座点。 OSCD确定光通道的最佳光源分布，从最佳光源分布生成D维训练序列，将新的信号星座点确定为每个D维聚类点的质心，并重复这些步骤直到收敛或 直到达到预定次数的迭代。 通过D维OSCD方法获得的坐标被存储在查找表（LUT）中，使用编码数据流从LUT中选择点，在数模转换之后将坐标输入到D维调制器（ DAC），并且调制信号通过光学介质传输。

公开(公告)号：US09036992B2

公开(公告)日：2015-05-19

申请号：US13903508

申请日：2013-05-28

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B. Djordjevic ,  Ting Wang

IPC: H04B10/08 ,  H04B17/00 ,  H04J14/02 ,  H04J14/06 ,  H04B10/12 ,  H04B10/04 ,  H04B10/2507 ,  H04B10/61

CPC classification number: H04B10/2507 ,  H04B10/616 ,  H04B10/6165

Abstract: Methods and systems for decoding a signal include compensating for impairments in a received signal using at least carrier phase estimation, where residual phase error remains after compensation; calculating symbol log-likelihood ratios (LLRs) for symbols in the compensated signal using Monte Carlo integration; demapping the symbols in the compensated signal using the symbol LLRs and extrinsic information from signal decoding to produce one or more estimated codewords; and decoding each estimated codeword with a decoder that generates a decoded codeword and extrinsic information.

Abstract translation: 用于对信号进行解码的方法和系统包括使用至少载波相位估计补偿接收信号中的损伤，其中在补偿之后残留相位误差; 使用蒙特卡罗积分计算补偿信号中的符号的符号对数似然比（LLR）; 使用来自信号解码的符号LLR和外在信息对补偿信号中的符号进行解映射以产生一个或多个估计码字; 以及用生成解码码字和外在信息的解码器解码每个估计码字。