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11.发明授权公开(公告)号：US09654314B2
公开(公告)日：2017-05-16
申请号：US14844909
申请日：2015-09-03
Applicant: NEC Laboratories America, Inc.
Inventor： Fatih Yaman , Shaoliang Zhang , Yue-Kai Huang
CPC classification number: H04L25/03859 , H04B10/2507 , H04B10/58 , H04B10/616 , H04L25/03171 , H04L25/03343
Abstract: A system for optimizing signal quality in an optical communication system is provided including a transmitter for converting digital signals to optical signals, the transmitter including a transmitter digital signal processing chip including a pre-distortion logic and a transmitter look-up table (LUT). A receiver is operatively coupled to the transmitter for receiving and converting the optical signals from the transmitter to digital signals. The receiver includes a receiver digital signal processing chip including a correction logic and a receiver look-up table (LUT). The transmitter LUT is constructed by scaling the receiver LUT by a weight factor and is iteratively updated based on a weighted sum of the receiver LUT.
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公开(公告)号：US09337867B2
公开(公告)日：2016-05-10
申请号：US14249609
申请日：2014-04-10
Applicant: NEC Laboratories America, Inc.
Inventor： Shaoliang Zhang , Fatih Yaman , Yequn Zhang
CPC classification number: H03M13/1111 , H03M13/1145 , H03M13/353 , H03M13/3723 , H03M13/3746 , H03M13/3776 , H03M13/3905 , H03M13/3972
Abstract: A computer implemented method for a cyclic (forward-backward) decoding for a forward error-correction FEC scheme includes decoding a given k−1th codeword in a block code of length N in an optical communication system, forwarding M symbols' enhanced log likelihood ratios LLRs produced by decoding the k−1th codeword, decoding the kth codeword together with forwarded M symbols' enhanced LLRS, and feeding backward, to the initial step i) decoding, corresponding overlapped M symbols' enhanced LLRs for decoding of the k−1th codeword again.
Abstract translation: 用于前向纠错FEC方案的循环（前向 - 反向）解码的计算机实现方法包括在光通信系统中解码长度为N的块码中的给定k-1个码字，将M个符号的增强对数似然比 通过解码第k-1个码字产生的LLR，将第k个码字与转发的M个符号的增强的LLRS一起解码，并向后馈送到初始步骤i）解码对应的重叠的M个符号的增强的LLR用于第k-1个码字的解码 再次。
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13.发明申请JOINT TRANSMITTER AND RECEIVER MAP ALGORITHM FOR ENHANCING FILTERING TOLERANCE IN A BANDWIDTH-LIMITED SYSTEM 有权联合发射机和接收机映射算法，用于增强带宽有限系统中的滤波容限公开(公告)号：US20160105297A1
公开(公告)日：2016-04-14
申请号：US14844909
申请日：2015-09-03
Applicant: NEC Laboratories America, Inc.
Inventor： Fatih Yaman , Shaoliang Zhang , Yue-Kai Huang
CPC classification number: H04L25/03859 , H04B10/2507 , H04B10/58 , H04B10/616 , H04L25/03171 , H04L25/03343
Abstract: A system for optimizing signal quality in an optical communication system is provided including a transmitter for converting digital signals to optical signals, the transmitter including a transmitter digital signal processing chip including a pre-distortion logic and a transmitter look-up table (LUT). A receiver is operatively coupled to the transmitter for receiving and converting the optical signals from the transmitter to digital signals. The receiver includes a receiver digital signal processing chip including a correction logic and a receiver look-up table (LUT). The transmitter LUT is constructed by scaling the receiver LUT by a weight factor and is iteratively updated based on a weighted sum of the receiver LUT.
Abstract translation: 提供了一种用于优化光通信系统中的信号质量的系统，包括用于将数字信号转换为光信号的发射机，该发射机包括包含预失真逻辑和发射机查找表（LUT）的发射机数字信号处理芯片。 接收机可操作地耦合到发射机，用于接收和转换从发射机到数字信号的光信号。 该接收机包括一个包括校正逻辑和接收机查找表（LUT）的接收机数字信号处理芯片。 发射机LUT是通过将接收机LUT缩放权重因子来构建的，并且基于接收机LUT的加权和重复地更新发射机LUT。
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14.发明申请CENTRALIZED AUTOMATIC BIAS CONTROL SYSTEM AND METHOD FOR MULTIPLE OPTICAL MODULATORS 有权用于多光学调制器的集中自动偏置控制系统和方法公开(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。
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15.发明授权公开(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。
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Patent Agency Ranking
16.发明申请公开(公告)号：US20140099128A1
公开(公告)日：2014-04-10
申请号：US14044518
申请日：2013-10-02
Applicant: NEC LABORATORIES AMERICA, INC.
Inventor： Eduardo F. Mateo , Fatih Yaman , Dayou Qian , Ting Wang
IPC: H04B10/61
CPC classification number: H04B10/6163
Abstract: An optical communication system includes a digital signal processer coupled to the coherent receiver, said coherent receiver including a nonlinearity compensation module for compensating for nonlinear effects in fiber in the optical link for increasing capacity or transmission distance of the fiber, the nonlinearity compensation module includes a spectral slicing of the signal into bands, computing nonlinear interaction between the bands with parameters opposite to those of the fiber to reverse the non-linear effects in the fiber, and only certain nonlinear interactions between bands are considered thereby reducing complexity of the nonlinearity compensation.
Abstract translation: 光通信系统包括耦合到相干接收机的数字信号处理器，所述相干接收机包括用于补偿光链路中的光纤中的非线性效应的非线性补偿模块，用于增加光纤的容量或传输距离，非线性补偿模块包括 将信号频谱切片成频带，计算具有与光纤相反参数的频带之间的非线性相互作用，以反转光纤中的非线性效应，并且仅考虑频带之间的某些非线性相互作用，从而降低非线性补偿的复杂性。
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17.发明申请公开(公告)号：US20130094851A1
公开(公告)日：2013-04-18
申请号：US13654960
申请日：2012-10-18
Applicant: NEC Laboratories America, Inc. , NEC Corporation
Inventor： Lei Xu , Shaoliang Zhang , Fatih Yaman , Ting Wang , Yoshihisa Inada , Takaaki Ogata , Yasuhiro Aoki
IPC: H04B10/08
CPC classification number: H04B10/07957 , H04B10/07 , H04B10/07953 , H04B10/2507 , H04B10/25073 , H04B10/2543 , H04B2210/254
Abstract: A method includes evaluating an optical signal spectrum for estimated filtering parameters of an optical spectral filtering device for shaping optical signal spectrum, determining a feedback for fine tuning the optical spectral filtering device for nonlinearity tolerance enhancement in the optical transmission system, responsive to received optical signal quality in the optical signal spectrum; and using the feedback to adjust said optical spectral filtering device for predetermined shaping and predetermined fiber nonlinearity tolerance in the optical transmission system.
Abstract translation: 一种方法包括评估用于光谱滤波装置的估计滤波参数的光信号频谱，用于整形光信号频谱，确定用于微光调整光谱滤波装置的反馈以对光传输系统中的非线性容限增强响应于接收到的光信号 光信号光谱质量; 并且使用所述反馈来调整所述光谱滤波装置以用于所述光传输系统中的预定成形和预定的光纤非线性公差。
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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：US10741992B2
公开(公告)日：2020-08-11
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 , H01S3/067 , H01S3/16 , H01S3/30
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.
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