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公开(公告)号：US12034482B2
公开(公告)日：2024-07-09
申请号：US17336280
申请日：2021-06-01
Applicant: NEC Laboratories America, Inc.
Inventor： Fatih Yaman , Eduardo Mateo Rodriguez , Shinsuke Fujisawa , Hussam Batshon , Kohei Nakamura , Takanori Inoue , Yoshihisa Inada , Takaaki Ogata
IPC: H04B10/2537 , G01H9/00 , H01S3/067 , H01S3/10 , H01S3/16 , H01S3/30 , H04B10/073 , H04B10/61
CPC classification number: H04B10/2537 , G01H9/004 , H01S3/06716 , H01S3/10061 , H01S3/1608 , H01S3/302 , H04B10/073 , H04B10/615
Abstract: Aspects of the present disclosure are directed to systems, methods, and structures providing for the accurate measurement of guided acoustic-wave Brillouin scattering in optical fiber transmission systems and facilities.
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公开(公告)号：US11782217B2
公开(公告)日：2023-10-10
申请号：US17684408
申请日：2022-03-01
Applicant: NEC Laboratories America, Inc.
Inventor： Fatih Yaman , Eduardo Mateo Rodriguez , Hassam Batshon , Shinsuke Fujisawa , Kohei Nakamura , Takanori Inoue , Yoshihisa Inada
CPC classification number: G02B6/274 , G02B6/4213
Abstract: Aspects of the present disclosure describe methods for reducing guided acoustic wave Brillouin (GAWBS) noise in an optical fiber that may be included in an optical communications system by reducing the polarization diffusion length of the fiber by increasing the birefringence of the optical fiber, the increased birefringence of the optical fiber being increased with respect to its average magnitude. Additionally, the polarization diffusion length is reduced by reducing the coherence length of birefringence of the optical fiber.
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公开(公告)号：US10374632B2
公开(公告)日：2019-08-06
申请号：US15729110
申请日：2017-10-10
Applicant: NEC Laboratories America, Inc. , NEC Corporation
Inventor： Shaoliang Zhang , Fatih Yaman , Ting Wang , Yoshihisa Inada
Abstract: Systems and methods for data transport in optical communications systems, including a transmitter for encoding a received information sequence by constructing an outer and inner quasi cyclic-low-density parity check (QC-LDPC) code. The encoding includes dividing the received information sequence into a plurality of messages of equal length, encoding each of the messages into a codeword to generate a plurality of outer codewords, cascading the plurality of outer codewords to generate a bit sequence, and executing inner encoding to encode each of the plurality of outer codewords into codewords in QC-LDPC inner code. A receiver decodes a received data stream based on the QC-LDPC inner code using two-phase decoding including iteratively performing at least one of inner/outer and outer/inner decoding until a threshold condition is reached.
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公开(公告)号：US20170353247A1
公开(公告)日：2017-12-07
申请号：US15078538
申请日：2016-03-23
Applicant: NEC Laboratories America, Inc.
Inventor： Fatih Yaman , Shaoliang Zhang , Eduardo Mateo Rodriquez , Yoshihisa Inada , Takaaki Ogata
CPC classification number: H04B10/541 , H04B10/25 , H04B10/40 , H04B10/504 , H04B10/516 , H04B10/612 , H04B10/69
Abstract: Methods and systems for communication with a modified constellation are provided. One of the methods includes coding, by a transmitter in the user equipment, an input data stream into a constellation of symbols having at least two neighboring symbols therein which differ by more than one bit and which are separated by a modified Euclidean distance to increase a Gaussian white noise resiliency of the at least two neighboring symbols with respect to remaining symbols, the remaining symbols being separated by the Euclidean distance of exactly one bit. The method further includes modulating, by the transmitter, the symbol stream into a transmission stream.
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公开(公告)号：US20160285668A1
公开(公告)日：2016-09-29
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
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.
Abstract translation: 用于与优化星座进行通信的方法和系统包括根据具有非格雷比特映射的优化星座将输入数据流编码为符号流，并且具有比具有一灰色相邻点的相邻点多一个比特差的相邻点 位差。 符号流被调制到传输信号上，随后在接收机处被解调以产生接收到的符号流。 接收到的符号流根据具有非格雷比特映射的优化星座被解码为比特流，并且具有比具有一个比特差的相邻点更远一个以上的比特差的相邻点。
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Patent Agency Ranking
公开(公告)号：US09450715B2
公开(公告)日：2016-09-20
申请号：US14808062
申请日：2015-07-24
Applicant: NEC Laboratories America, Inc.
Inventor： Shaoliang Zhang , Fatih Yaman , Yoshihisa Inada
CPC classification number: H04L1/205 , H04L1/206 , H04L27/00 , H04L27/0014 , H04L27/2656 , H04L27/3827
Abstract: A system for carrier phase recovery, including a receiver for receiving one or more frames of L symbols. A phase estimator performs carrier phase estimation for the received frames of L symbols, and the resulting carrier phase estimates are stored in a non-transitory computer-readable storage medium. One or more rotators de-rotates the received frames of L symbols by one or more of the carrier phase estimates, and a data processor calculates a sum of the outputs of the L de-rotated signals raised to an nth power, and determines a real part of the sum. A minimum determination device determines a minimum of the real part of the sum with respect to the carrier phase estimates, and phase unwrapping and multiplier removal is performed if a minimum has been determined.
Abstract translation: 一种用于载波相位恢复的系统，包括用于接收一个或多个L个符号帧的接收机。 相位估计器对接收的L个符号的帧执行载波相位估计，并且所得到的载波相位估计被存储在非暂时的计算机可读存储介质中。 一个或多个旋转器通过载波相位估计中的一个或多个使L个符号的接收帧去旋转，并且数据处理器计算升高到第n个功率的L个去旋转信号的输出的和，并且确定真实的 总和的一部分。 最小确定装置确定相对于载波相位估计的总和的实部的最小值，并且如果已经确定了最小值，则执行相位展开和乘法器去除。
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公开(公告)号：US09077484B2
公开(公告)日：2015-07-07
申请号：US14046588
申请日：2013-10-04
Applicant: NEC Laboratories America, Inc.
Inventor： Shaoliang Zhang , Fatih Yaman , Ting Wang , Yoshihisa Inada , Takaaki Ogata , Yasuhiro Aoki
IPC: H04B10/04 , H04J14/06 , H04B10/556
CPC classification number: H04J14/06 , H04B10/5561
Abstract: Methods, structures and systems for generating different polarization multiplexed signals wherein the drivers of the modulators are generic while a software-controlled manager allows the carrying of any standard 10 G/40 G/100 G data while—at the same time—being adaptively adjustable according to specific link requirements and users' requests in both dispersion-managed and uncompensated links.
Abstract translation: 用于产生不同偏振复用信号的方法，结构和系统，其中调制器的驱动器是通用的，而软件控制的管理器允许携带任何标准的10G / 40G / 100G数据，同时可自适应地调节 根据具体链路要求和用户在色散管理和无补偿链路中的请求。
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公开(公告)号：US11043786B2
公开(公告)日：2021-06-22
申请号：US15956284
申请日：2018-04-18
Applicant: NEC Laboratories America, Inc.
Inventor： Fatih Yaman , Shaoliang Zhang , Eduardo Mateo Rodriguez , Kohei Nakamura , Yoshihisa Inada , Takanori Inoue
IPC: H01S3/067 , G02B6/44 , G02B6/02 , H01S3/23 , H01S3/094 , H01S3/16 , H01S3/0941 , H01S5/10 , H01S5/20 , H01S5/40
Abstract: Aspects of the present disclosure describe systems, methods, and structures that advantageously amplify optical signals through the effect of optical pump signals generated by a multicore laser diode and multicore rare-earth doped optical fiber in optical communication with a 3D waveguide structure and a multicore input signal fiber providing a plurality of optical signals for amplification.
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9.发明授权公开(公告)号：US10581216B2
公开(公告)日：2020-03-03
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
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.
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10.发明授权公开(公告)号：US10340649B2
公开(公告)日：2019-07-02
申请号：US15912810
申请日：2018-03-06
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： Fatih Yaman , Shaoliang Zhang , Eduardo Mateo Rodriquez , Takanori Inoue , Yoshihisa Inada
Abstract: Aspects of the present disclosure describe systems, methods, and structures for providing C-band and L-band transmission exhibiting increased power efficiency by diverting a portion of C-band optical energy to an input of L-band optical amplifiers (C-seeding) while optionally employing circulators to eliminate the need for optical isolators.
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