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41.发明申请Interleaved Bidirectional Sub-Nyquist Transmission with Overlapping Counter-Propagating Signal Spectral Bands 审中-公开具有重叠反向传播信号谱带的交织双向子奈奎斯特传输公开(公告)号：US20150304036A1
公开(公告)日：2015-10-22
申请号：US14689099
申请日：2015-04-17
Applicant: NEC Laboratories America, Inc.
Inventor： Yue-Kai Huang , Shaoliang Zhang , Fatih Yaman , Ezra Ip
IPC: H04B10/2507 , H04B10/25 , H04J14/02
CPC classification number: H04B10/25073 , H04B10/2543 , H04J14/0265
Abstract: A controller for generating higher fiber spectral efficiency without using high-order modulation formats includes operating an interleaved bidirectional transmission IBT with sub-Nyquist optical regime exchange reach for spectral efficiency.
Abstract translation: 用于在不使用高阶调制格式的情况下产生较高光纤频谱效率的控制器包括以子奈奎斯特光学方式的交换范围来操作具有频谱效率的交错双向传输IBT。
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42.发明申请Rhombic-QPSK Modulation for Improved Tolerance to Nonlinearity in Fiber Communication Systems 有权用于提高光纤通信系统中非线性公差的Rhombic-QPSK调制公开(公告)号：US20150043680A1
公开(公告)日：2015-02-12
申请号：US14456427
申请日：2014-08-11
Applicant: NEC Laboratories America, Inc.
Inventor： Eduardo Mateo Rodriquez , Fatih Yaman , Shaoliang Zhang , Ting Wang
IPC: H04L27/20
CPC classification number: H04L27/2067 , H04B2201/709709 , H04L25/03343
Abstract: This invention proposes an alternative modulation format for channels that present improved performance when such channels co-propagate with existing intensity modulated channels. This modulation format is named Rhombic-QPSK (R-QPSK) and it is designed in such a way that it presents more tolerance to phase noise created by the nonlinear interaction with the legacy channels.
Abstract translation: 本发明提出了一种用于在这种信道与现有的强度调制信道共同传播时呈现改善的性能的信道的替代调制格式。 该调制格式被称为菱形QPSK（R-QPSK），并且它被设计成使得它对由与传统通道的非线性相互作用产生的相位噪声具有更大的容限。
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公开(公告)号：US20140310580A1
公开(公告)日：2014-10-16
申请号：US14249609
申请日：2014-04-10
Applicant: NEC Laboratories America, Inc.
Inventor： Shaoliang Zhang , Fatih Yaman , Yequn Zhang
IPC: H03M13/45
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 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−1 th 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以长度为N的块码解码给定的第k-1个码字，将M个符号的增强对数似然 比较通过解码第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）解码相应的重叠的M个符号的增强的LLR以解码k-1 th码字。
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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：US11960042B2
公开(公告)日：2024-04-16
申请号：US17307991
申请日：2021-05-04
Applicant: NEC Laboratories America, Inc.
Inventor： Ezra Ip , Yue-Kai Huang , Fatih Yaman
IPC: G01V1/22 , G01V1/38 , H04B10/077 , H04J14/02 , H04L7/00
CPC classification number: G01V1/226 , G01V1/38 , H04B10/077 , H04J14/02 , H04L7/0075
Abstract: Aspects of the present disclosure are directed to laser interferometric systems, methods, and structures exhibiting superior laser phase noise tolerance particularly in seismic detection applications wherein laser requirements are advantageously relaxed by employing a novel configuration wherein the same laser which generates an outgoing signal is coherently detected using the same laser as local oscillator and fiber turnarounds are employed that result in the cancellation and/or mitigation of undesired mechanical vibration.
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Patent Agency Ranking
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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47.发明授权公开(公告)号：US10466172B2
公开(公告)日：2019-11-05
申请号：US15678656
申请日：2017-08-16
Applicant: NEC Laboratories America, Inc.
Inventor： Fatih Yaman , Giovanni Milione , Shaoliang Zhang , Yue-Kai Huang
Abstract: A system and method are provided for distributed acoustic sensing in a multimode optical fiber. The system includes a transmitter for simultaneously propagating a sequence of M light pulses through the multimode optical fiber using a spatial mode selected from a set of N spatial modes provided by a spatial mode selector for the transmitter that is coupled to an input to the multimode optical fiber, with M and N being respective integers greater than one. The system further includes a receiver for receiving the sequence of M light pulses at an output of the multimode optical fiber and detecting an environmental perturbation in the multimode optical fiber based on an evaluation of a propagation of the sequence of M light pulses through the multimode optical fiber.
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48.发明授权公开(公告)号：US10382138B2
公开(公告)日：2019-08-13
申请号：US15912852
申请日：2018-03-06
Applicant: NEC Laboratories America, Inc.
Inventor： Shaoliang Zhang , Fatih Yaman , Eduardo Mateo Rodriguez , Yoshihisa Inada
IPC: H04L1/00 , H03M13/11 , H03M13/25 , H04B10/27 , H04B10/58 , H04L27/34 , H04L27/36 , H04B10/2543 , H04B10/54 , H04B10/516
Abstract: Aspects of the present disclosure describe methods of generating an optimized set of constellation symbols for an optical transmission network wherein the optimized constellation is based on GMI cost and considers both fiber nonlinearity and linear transmission noise.
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公开(公告)号：US20190109752A1
公开(公告)日：2019-04-11
申请号：US16153029
申请日：2018-10-05
Applicant: NEC Laboratories America, Inc.
Inventor： Shaoliang Zhang , Fatih Yaman , Ting Wang , Zhen Qu
IPC: H04L27/34 , H04B10/516 , H04B10/61 , H04L1/00
CPC classification number: H04L27/345 , H04B10/5161 , H04B10/541 , H04B10/616 , H04L1/0058 , H04L1/0061 , H04L27/3405
Abstract: Systems and methods for optical data transport, including controlling data transport across an optical transmission medium by generating two-dimensional (2D) distribution matchers (DMs) based on probabilistic fold shaping (PFS) and arbitrary probabilistic shaping (APS). The 2D PFS-based DM is can encode any N-fold rotationally symmetrical Quadrature Amplitude Modulation (QAM) format by applying the 2D PFS-based DM only to symbols in one quadrant based on a target entropy. A fold index yield uniform distribution is determined, and is utilized to carry generated uniform distributed parity check bits across the optical transmission medium. The 2D APS-based DM can encode any arbitrary modulation formats by encoding uniform binary data to generate non-uniform target symbols, and generating a probability distribution for the target symbols by indirectly applying the 2D APS-based DM based on a target probability distribution and a detected code rate of generated FEC code.
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公开(公告)号：US20190109736A1
公开(公告)日：2019-04-11
申请号：US16153051
申请日：2018-10-05
Applicant: NEC Laboratories America, Inc. , NEC Corporation
Inventor： Fatih Yaman , Shaoliang Zhang , Eduardo Mateo Rodriguez , Yoshihisa Inada , Yue-Kai Huang , Weiyang Mo
IPC: H04L25/03 , H04B10/079 , G06N3/08
Abstract: Systems and methods for transmission filtering are provided. A receiver includes an input coupled to a transmission line to receive distorted optical symbols. A distortion filter is coupled to the input to replace the distorted optical symbols with predicted symbols using a trained neural network. A decoder is coupled to the distortion filter to decode the predicted symbols.
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