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21.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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22.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：US11933605B2
公开(公告)日：2024-03-19
申请号：US17577315
申请日：2022-01-17
Applicant: NEC Laboratories America, Inc.
Inventor： Fatih Yaman , Hussam Batshon , Shinsuke Fujisawa , Kohei Nakamura , Takanori Inoue , Eduardo Mateo Rodriguez , Yoshihisa Inada
CPC classification number: G01B11/272 , G01M11/33
Abstract: Aspects of the present disclosure describe estimating/measuring core-cladding concentricity error in optical fibers. In sharp contrast to the prior art, our inventive method is based on measuring a seemingly unrelated property of fibers called guided acoustic wave Brillouin scattering (GAWBS). As we shall show and describe, by analyzing this GAWBS property we advantageously determine what level of CCCE is exhibited by the optical fiber.
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24.发明授权公开(公告)号：US11467061B2
公开(公告)日：2022-10-11
申请号：US17341033
申请日：2021-06-07
Applicant: NEC Laboratories America, Inc.
Inventor： Fatih Yaman , Eduardo Mateo Rodriguez , Shinsuke Fujisawa , Hussam Batshon , Kohei Nakamura , Takanori Inoue , Yoshihisa Inada , Takaaki Ogata
IPC: G01M11/00
Abstract: Aspects of the present disclosure describe a method for estimating mode field distribution in optical fibers from guided acoustic-wave Brillouin scattering wherein light for which the optical mode-field distribution is determined remains in the optical fibers and the distribution is made for light inside the fiber, and not at a fiber/air interface or other perturbation points to the fiber resulting in a more accurate representation of the optical mode-field distribution in the fiber. Since light is always in the fiber during the determination, no complicated fiber preparation steps or procedures are required and the mode-field distribution is determined as an average distribution along the length of the fiber under test.
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公开(公告)号：US11270200B2
公开(公告)日：2022-03-08
申请号：US16285870
申请日：2019-02-26
Applicant: NEC Laboratories America, Inc.
Inventor： Shaoliang Zhang , Fatih Yaman , Ting Wang , Eduardo Rodriguez , Yoshihisa Inada , Kohei Nakamura , Takanori Inoue
Abstract: Aspects of the present disclosure describe a method for digital coherent transmission systems that advantageously provides low-complexity, single-step nonlinearity compensation based on artificial intelligence (AI) implemented in a deep neuron network (DNN).
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Patent Agency Ranking
公开(公告)号：US20180102791A1
公开(公告)日：2018-04-12
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
CPC classification number: H03M13/116 , H03M13/1171 , H03M13/2792 , H03M13/2906 , H03M13/2957 , H03M13/616 , H04B10/27 , H04B10/516 , H04B10/616 , H04L1/0041 , H04L1/0045 , H04L1/005 , H04L1/0058 , H04L1/0065
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：US09337868B2
公开(公告)日：2016-05-10
申请号：US14336074
申请日：2014-07-21
Applicant: NEC Laboratories America, Inc. , NEC Corporation
Inventor： Shaoliang Zhang , Fatih Yaman , Yoshihisa Inada , Takaaki Ogata , Takanori Inoue
CPC classification number: H03M13/1111 , H03M13/256 , H03M13/2957 , H03M13/4138 , H04L1/005 , H04L1/0057 , H04L1/006 , H04L1/0064 , H04L1/0076
Abstract: At a receiver side, to enhance the performance of concatenated LDPC and TCM coding, an iterative decoding between TCM decoder and LDPC decoder enables improvement in the reliability of received LLRs of each symbol after each iteration. A SOVA output of the TCM is used for LDPC decoding, and then the updated LLRs from LDPC decoder are further looped back to the TCM decoder for the next iteration. In such a manner, the decoding performance could be significantly improved after just several iterations.
Abstract translation: 在接收机侧，为了提高级联LDPC和TCM编码的性能，TCM解码器和LDPC解码器之间的迭代解码器能够在每次迭代后提高每个符号的接收LLR的可靠性。 TCM的SOVA输出用于LDPC解码，然后来自LDPC解码器的更新的LLR进一步循环回TCM解码器进行下一次迭代。 以这种方式，在几次迭代之后，解码性能可以显着提高。
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28.发明申请公开(公告)号：US20140099126A1
公开(公告)日：2014-04-10
申请号：US14044298
申请日：2013-10-02
Applicant: NEC Laboratories America, Inc.
Inventor： Fatih Ioanna Yaman , Shaoliang Zhang , Ting Wang , Takaaki Ogata , Yoshihisa Inada , Yasuhiro Aoki
IPC: 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一起编码和解码以增加接收机灵敏度。
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公开(公告)号：US20130089327A1
公开(公告)日：2013-04-11
申请号：US13649161
申请日：2012-10-11
Applicant: NEC Laboratories America, Inc. , NEC Corporation
Inventor： Shaoliang Zhang , Lei Xu , Junqiang Hu , Fatih Yaman , Ting Wang , Yoshihisa Inada , Takaaki Ogata , Yasuhiro Aoki
CPC classification number: H04B10/5055 , H04B10/5561 , H04J14/06
Abstract: A method implemented in a transmission apparatus used in an optical fiber communications system for a polarization switched differential quaternary phase-shift keying (DQPSK) signal is disclosed. The method comprises splitting data into two or more data streams, inputting said two or more data streams to 1-bit DQPSK precoders to perform 1-bit DQPSK precoding, and multiplexing inphase outputs of the 1-bit DQPSK precoders to generate a first output; and multiplexing quadrature outputs of the 1-bit DQPSK precoders to generate a second output. Other methods, apparatuses, and systems also are disclosed.
Abstract translation: 公开了一种在用于偏振切换差分四相移键控（DQPSK）信号的光纤通信系统中使用的发送装置中实现的方法。 该方法包括将数据分成两个或更多个数据流，将所述两个或多个数据流输入到1比特DQPSK预编码器以执行1比特DQPSK预编码，以及复用1比特DQPSK预编码器的同相输出以产生第一输出; 以及复用1位DQPSK预编码器的正交输出以产生第二输出。 还公开了其它方法，装置和系统。
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公开(公告)号：US11888583B2
公开(公告)日：2024-01-30
申请号：US17543616
申请日：2021-12-06
Applicant: NEC Laboratories America, Inc.
Inventor： Fatih Yaman , Shinsuke Fujisawa , Hussam Batshon , Takigawa Yoshinari , Ryuji Aida , Takanori Inoue , Eduardo Rodriguez , Yoshihisa Inada
CPC classification number: H04J14/0221 , G02B6/4427 , H04Q11/0001 , G02B6/506
Abstract: Aspects of the present disclosure describe systems, methods. and structures directed to an integrated 3-way branching unit switch module suitable for undersea application.
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