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1. 发明授权

US08953939B2 Variable bit-rate QPSK transmitter and method employing polarization manipulation 有权
标题翻译：可变比特率QPSK发射机和采用极化处理的方法
公开(公告)号：US08953939B2
公开(公告)日：2015-02-10
申请号：US13667708
申请日：2012-11-02
申请人： NEC Laboratories America, Inc.
发明人： Shaoliang Zhang , Dayou Qian , Junqiang Hu , Lei Xu , Ting Wang
IPC分类号： H04J14/06 , H04B10/04 , H04B10/12 , H04B10/50
CPC分类号： H04J14/06 , H04B10/5055
摘要： Disclosed are universal QPSK transmitter structures and methods for generating different QPSK signals exhibiting different polarization schemes, namely PolMux, PolMod and PolSw. The bit rate of the generated signals is variable, thereby allowing the transmitter to adjust to varying network traffic conditions. Advantageously, the generated signals may be detected by analog receivers (PolSw-QPSK) and coherent receivers (PolMux-QPSK, PolMod-QPSK, and PolSw-QPSK).
摘要翻译：公开了用于产生表现出不同偏振方案的不同QPSK信号的通用QPSK发射机结构和方法，即PolMux，PolMod和PolSw。所产生的信号的比特率是可变的，从而允许发射机适应不同的网络业务状况。有利地，所产生的信号可以由模拟接收机（PolSw-QPSK）和相干接收机（PolMux-QPSK，PolMod-QPSK和PolSw-QPSK）来检测。

2. 发明申请

US20130089327A1 Polarization Switching for Optical Fiber Communications 有权
标题翻译：光纤通信的极化切换
公开(公告)号：US20130089327A1
公开(公告)日：2013-04-11
申请号：US13649161
申请日：2012-10-11
申请人： NEC Laboratories America, Inc. , NEC Corporation
发明人： Shaoliang Zhang , Lei Xu , Junqiang Hu , Fatih Yaman , Ting Wang , Yoshihisa Inada , Takaaki Ogata , Yasuhiro Aoki
IPC分类号： H04J14/06 , H04J14/08
CPC分类号： H04B10/5055 , H04B10/5561 , H04J14/06
摘要： 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.
摘要翻译：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。

3. 发明授权

US09094125B2 Multidimensional coded-modulation for high-speed optical transport over few-mode fibers 有权
标题翻译：用于多模光纤高速光传输的多维编码调制
公开(公告)号：US09094125B2
公开(公告)日：2015-07-28
申请号：US13901766
申请日：2013-05-24
申请人： NEC Laboratories America, Inc.
发明人： Ivan B. Djordjevic , Lei Xu , Ting Wang
IPC分类号： H04B10/12 , H04B10/04 , H04B10/06 , H04B10/2581 , H04B10/516 , H04L1/00
CPC分类号： H04B10/2581 , H04B10/516 , H04L1/0041 , H04L5/0008 , H04L5/0023 , H04L27/3405 , H04L27/3422
摘要： 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.
摘要翻译：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。

4. 发明申请

US20150043927A1 Combining I-Q and/or PolMux Optical Receiver to Enable Single Detector 有权
标题翻译：将I-Q和/或PolMux光接收器组合使能单检测器
公开(公告)号：US20150043927A1
公开(公告)日：2015-02-12
申请号：US14457460
申请日：2014-08-12
申请人： NEC Laboratories America, Inc.
发明人： Junqiang Hu , Ting Wang , Lei Xu
IPC分类号： H04B10/61
CPC分类号： H04B10/613 , H04B10/612 , H04B10/614
摘要： A method for reducing optical components at a receiver which include converting an input signal at a receiver to include an interleaving of alternate signal diversity components, the signal diversity components including phase diversity when the converting includes 0 and 90 degree interleaving and the signal diversity components include polarization diversity interleaving when the converting includes interleaved orthogonal polarizations, and combining the signal diversity components for enabling a single photo detection at the receiver to detect the alternative signal diversity components for subsequent analog-to-digital conversion.
摘要翻译：一种用于减少接收机处的光学部件的方法，包括在接收机处转换输入信号以包括交替的信号分集分量的交织，所述信号分集分量包括当转换包括0和90度交织时的相位分集，并且信号分集分量包括当转换包括交错的正交偏振时，偏振分集交错，以及组合信号分集分量，以使接收机处的单次光检测能够检测用于随后的模数转换的备选信号分集分量。

5. 发明授权

US08874987B2 Optimum signal constellation design for high-speed optical transmission 有权
标题翻译：用于高速光传输的最佳信号星座设计
公开(公告)号：US08874987B2
公开(公告)日：2014-10-28
申请号：US13646454
申请日：2012-10-05
申请人： NEC Laboratories America, Inc.
发明人： Ivan B. Djordjevic , Lei Xu , Ting Wang
IPC分类号： H03M13/00 , H04L1/00 , H03M13/11 , H03M13/25 , H04J14/06 , H03M13/39 , H03M13/29
CPC分类号： H04L1/0057 , H03M13/116 , H03M13/255 , H03M13/2957 , H03M13/3905 , H03M13/3972 , H03M13/6331 , H04J14/06 , H04L1/0003
摘要： Systems and methods for data transport, comprising encoding one or more streams of input data with one or more low density parity check (LDPC) encoders, corresponding to one or more polarization/spatial mode branches. One or more encoded data streams are mapped to symbols, wherein the mapper is configured to assign bits of the symbols to a signal constellation and to associate the bits of the symbols with signal constellation points. A signal constellation is formulated which minimizes a mean-square error of the signal constellation representing the source. The optimum signal constellation size is adjusted to improve transmission quality by adjusting the signal constellation an optical signal to noise ratio (OSNR), wherein the signal constellation is selected using a look-up table (LUT); and the symbols are modulated in accordance with the output of the mapper onto a transmission medium.
摘要翻译：用于数据传输的系统和方法，包括对应于一个或多个极化/空间模式分支，用一个或多个低密度奇偶校验（LDPC）编码器编码一个或多个输入数据流。将一个或多个编码数据流映射到符号，其中映射器被配置为将符号的位分配给信号星座并将符号的位与信号星座点相关联。配置信号星座，其最小化表示源的信号星座的均方误差。调整最佳信号星座大小以通过调整信号星座图的光信噪比（OSNR）来提高传输质量，其中使用查找表（LUT）来选择信号星座; 并且根据映射器的输出将符号调制到传输介质上。

6. 发明申请

US20130094851A1 Optical Spectral Shaping for Nonlinearity Enhancement in High Speed Digital Coherent Optical Transmissions 有权
标题翻译：用于高速数字相干光传输中非线性增强的光谱整形
公开(公告)号：US20130094851A1
公开(公告)日：2013-04-18
申请号：US13654960
申请日：2012-10-18
申请人： NEC Laboratories America, Inc. , NEC Corporation
发明人： Lei Xu , Shaoliang Zhang , Fatih Yaman , Ting Wang , Yoshihisa Inada , Takaaki Ogata , Yasuhiro Aoki
IPC分类号： H04B10/08
CPC分类号： H04B10/07957 , H04B10/07 , H04B10/07953 , H04B10/2507 , H04B10/25073 , H04B10/2543 , H04B2210/254
摘要： 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.
摘要翻译：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。

7. 发明授权

US08917998B2 Polarization switching for optical fiber communications 有权
标题翻译：光纤通信的极化切换
公开(公告)号：US08917998B2
公开(公告)日：2014-12-23
申请号：US13649161
申请日：2012-10-11
申请人： NEC Laboratories America, Inc.
发明人： Shaoliang Zhang , Lei Xu , Junqiang Hu , Fatih Yaman , Ting Wang , Yoshihisa Inada , Takaaki Ogata , Yasuhiro Aoki
IPC分类号： H04B10/04 , H04B10/12 , H04B10/50 , H04J14/06 , H04B10/556
CPC分类号： H04B10/5055 , H04B10/5561 , H04J14/06
摘要： 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.
摘要翻译：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。

8. 发明授权

US08880985B2 High-speed long codeword QC-LDPC soft decision decoder 有权
标题翻译：高速长码字QC-LDPC软判决解码器
公开(公告)号：US08880985B2
公开(公告)日：2014-11-04
申请号：US13646470
申请日：2012-10-05
申请人： NEC Laboratories America, Inc.
发明人： Junqiang Hu , Lei Xu , Ting Wang
IPC分类号： H03M13/03 , H03M13/13 , H03M13/11
CPC分类号： H03M13/13 , H03M13/1117 , H03M13/1137 , H03M13/1145 , H03M13/116
摘要： A Quasi-Cyclic, LDPC, large girth, soft-decision decoder and accompanying methods.
摘要翻译：准循环，LDPC，大环，软判决解码器及其附带的方法。

9. 发明授权

US09450616B2 Adaptive coded-modulation for intelligent optical transport networks 有权
标题翻译：智能光传输网络的自适应编码调制
公开(公告)号：US09450616B2
公开(公告)日：2016-09-20
申请号：US14567321
申请日：2014-12-11
申请人： NEC Laboratories America, Inc.
发明人： Shaoliang Zhang , Ting Wang , Yequn Zhang , Lei Xu
IPC分类号： H03M13/00 , H03M13/35 , H03M13/11 , H03M13/29
CPC分类号： H03M13/353 , H03M13/1171 , H03M13/2906 , H03M13/6508
摘要： A computer implemented method for dynamic data rate adjustment within a cascaded forward error correction FEC for optical communications includes subjecting data communicated over an optical network to a forward error correction in an encoding or decoding of the data, the encoding or decoding employing a codeword, re-encoding part of the codeword for generating a subsequent codeword where an actual code rate is tuned by adjusting a size of data encoded to provide re-encoded data, and dynamically changing the re-encoded data size to achieve cascaded rate adaptive FEC for communication of the data over the optical network.
摘要翻译：用于光通信的级联前向纠错FEC中的用于动态数据速率调整的计算机实现方法包括：通过光网络传送的数据在数据的编码或解码中进行前向纠错，采用码字的编码或解码 - 用于生成后续码字的编码部分，用于生成后续码字，其中通过调整被编码以提供重新编码的数据的数据的大小来调整实际码率，并动态地改变重新编码的数据大小以实现用于通信的级联速率自适应FEC 光网络上的数据。

10. 发明授权

US09337923B2 Optical spectral shaping for nonlinearity enhancement in high speed digital coherent optical transmissions 有权
标题翻译：用于高速数字相干光传输中非线性增强的光谱整形
公开(公告)号：US09337923B2
公开(公告)日：2016-05-10
申请号：US13654960
申请日：2012-10-18
申请人： NEC Laboratories America, Inc. , NEC Corporation
发明人： Lei Xu , Shaoliang Zhang , Fatih Yaman , Ting Wang , Yoshihisa Inada , Takaaki Ogata , Yasuhiro Aoki
IPC分类号： H04B10/12 , H04B10/00 , H04B10/04 , H04B10/079 , H04B10/2507 , H04B10/07 , H04B10/2543
CPC分类号： H04B10/07957 , H04B10/07 , H04B10/07953 , H04B10/2507 , H04B10/25073 , H04B10/2543 , H04B2210/254
摘要： 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.
摘要翻译：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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