公开(公告)号：US09197249B2

公开(公告)日：2015-11-24

申请号：US13911326

申请日：2013-06-06

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B. Djordjevic ,  Ting Wang

IPC: H03M13/11 ,  H03M13/27 ,  H03M13/31 ,  H03M13/35

CPC classification number: H03M13/1148 ,  H03M13/1102 ,  H03M13/2707 ,  H03M13/31 ,  H03M13/353

Abstract: Systems and methods of transmitting includes one or more low-density parity-check (LDPC) encoders configured to adaptively encode one or more streams of input data by adjusting error correction strength based upon channel conditions. One or more mappers are configured to map one or more encoded data streams to symbols by associating bits of the symbols to points of an optimum signal constellation design (OSCD) based on one or more encoded data streams, the OSCD being decomposed into two or more sub-constellations. A spectral multiplexer is configured to combine symbol streams for the one or more encoded data streams to provide a plurality of spectral band groups. A mode multiplexer is configured to combine spectral contents of the plurality of spectral band groups allocated to a plurality of spatial modes for transmission over a transmission medium.

Abstract translation: 发送系统和方法包括一个或多个低密度奇偶校验（LDPC）编码器，其被配置为通过基于信道条件调整误差校正强度来自适应地编码一个或多个输入数据流。 一个或多个映射器被配置为通过将符号的位与基于一个或多个编码数据流的最佳信号星座图设计（OSCD）的点相关联来将一个或多个编码数据流映射到符号，OSCD被分解为两个或更多个 分星座。 频谱复用器被配置为组合用于一个或多个编码数据流的符号流以提供多个频谱带组。 模式多路复用器被配置为组合分配给多个空间模式的多个频谱带组的频谱内容以便在传输介质上传输。

公开(公告)号：US20150229437A1

公开(公告)日：2015-08-13

申请号：US14179683

申请日：2014-02-13

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B. Djordjevic ,  Ting Wang

IPC: H04L1/00 ,  H04J14/00 ,  H04L27/26 ,  H03M13/11

CPC classification number: H04L1/0041 ,  H03M13/116 ,  H03M13/1177 ,  H03M13/255 ,  H03M13/271 ,  H03M13/2957 ,  H03M13/6325 ,  H04B10/2581 ,  H04B10/61 ,  H04J14/002 ,  H04L1/0045 ,  H04L1/0058 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/025 ,  H04L25/0256 ,  H04L27/2626 ,  H04L27/2697 ,  H04L27/3405 ,  H04L27/362

Abstract: A system/method for data transport, including encoding one or more streams of input data using one or more Low Density Parity Check (LDPC) encoders; employing one or more signal constellations obtained using an optimum signal constellation design (OSCD); determining an optimum mapping rule by comparing cost functions of each of a plurality of mapping rules; combining one or more LDPC-coded OSCD signal constellation data streams with coherent optical-orthogonal frequency division multiplexing (CO-OFDM) coded modulation to achieve channel capacity; and mode-multiplexing and transmitting one or more independent LDPC-coded optimum signal constellation design (OSCD) data streams over a transmission medium.

Abstract translation: 一种用于数据传输的系统/方法，包括使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; 采用使用最佳信号星座设计（OSCD）获得的一个或多个信号星座; 通过比较多个映射规则中的每一个的成本函数来确定最佳映射规则; 将一个或多个LDPC编码的OSCD信号星座数据流与相干光正交频分复用（CO-OFDM）编码调制组合以实现信道容量; 以及通过传输介质来模式复用和发送一个或多个独立的LDPC编码的最佳信号星座设计（OSCD）数据流。

公开(公告)号：US20130148963A1

公开(公告)日：2013-06-13

申请号：US13712465

申请日：2012-12-12

Applicant: NEC Laboratories America, Inc.

Inventor： Milorad Cvijetic ,  Ivan B. Djordjevic ,  Neda Cvijetic ,  Ting Wang

IPC: H04J14/04

CPC classification number: H04J14/04 ,  H04B10/2581 ,  H04B10/532 ,  H04B10/548

Abstract: An optical network includes a multidimensional coder and modulator for handling multiple-in-multiple-out MIMO spatial lightpath properties and content of any specific supercarrier, a spatial mode multiplexer responsive to orthogonal frequency division multiplexing OFDM transmissions and the multidimensional coder, a spatial-spectral routing node coupled over a fiber link to the spatial mode multiplexer for performing switching granularity by a spatial mode reconnection, a multidimensional decoder and demodulator; and a spatial mode demultiplexer coupled over a fiber link to the spatial-spectral routing node and responsive to the multidimensional decoder and demodulator.

Abstract translation: 光网络包括用于处理多重多输出MIMO空间光路特性和任何特定超载波的内容的多维编码器和调制器，响应于正交频分复用OFDM传输的空间模式多路复用器和多维编码器，空间光谱 通过光纤链路耦合到空间模式多路复用器的路由节点，用于通过空间模式重新连接来执行交换粒度;多维解码器和解调器; 以及空间模式解复用器，其通过光纤链路耦合到空间光谱路由节点并响应于多维解码器和解调器。

公开(公告)号：US09094125B2

公开(公告)日：2015-07-28

申请号：US13901766

申请日：2013-05-24

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

IPC: H04B10/12 ,  H04B10/04 ,  H04B10/06 ,  H04B10/2581 ,  H04B10/516 ,  H04L1/00

CPC classification number: H04B10/2581 ,  H04B10/516 ,  H04L1/0041 ,  H04L5/0008 ,  H04L5/0023 ,  H04L27/3405 ,  H04L27/3422

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US09036992B2

公开(公告)日：2015-05-19

申请号：US13903508

申请日：2013-05-28

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B. Djordjevic ,  Ting Wang

IPC: H04B10/08 ,  H04B17/00 ,  H04J14/02 ,  H04J14/06 ,  H04B10/12 ,  H04B10/04 ,  H04B10/2507 ,  H04B10/61

CPC classification number: H04B10/2507 ,  H04B10/616 ,  H04B10/6165

Abstract: Methods and systems for decoding a signal include compensating for impairments in a received signal using at least carrier phase estimation, where residual phase error remains after compensation; calculating symbol log-likelihood ratios (LLRs) for symbols in the compensated signal using Monte Carlo integration; demapping the symbols in the compensated signal using the symbol LLRs and extrinsic information from signal decoding to produce one or more estimated codewords; and decoding each estimated codeword with a decoder that generates a decoded codeword and extrinsic information.

Abstract translation: 用于对信号进行解码的方法和系统包括使用至少载波相位估计补偿接收信号中的损伤，其中在补偿之后残留相位误差; 使用蒙特卡罗积分计算补偿信号中的符号的符号对数似然比（LLR）; 使用来自信号解码的符号LLR和外在信息对补偿信号中的符号进行解映射以产生一个或多个估计码字; 以及用生成解码码字和外在信息的解码器解码每个估计码字。

公开(公告)号：US08874987B2

公开(公告)日：2014-10-28

申请号：US13646454

申请日：2012-10-05

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B. Djordjevic ,  Lei Xu ,  Ting Wang

IPC: H03M13/00 ,  H04L1/00 ,  H03M13/11 ,  H03M13/25 ,  H04J14/06 ,  H03M13/39 ,  H03M13/29

CPC classification number: H04L1/0057 ,  H03M13/116 ,  H03M13/255 ,  H03M13/2957 ,  H03M13/3905 ,  H03M13/3972 ,  H03M13/6331 ,  H04J14/06 ,  H04L1/0003

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20140101512A1

公开(公告)日：2014-04-10

申请号：US13911326

申请日：2013-06-06

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B. Djordjevic ,  Ting Wang

IPC: H03M13/11

CPC classification number: H03M13/1148 ,  H03M13/1102 ,  H03M13/2707 ,  H03M13/31 ,  H03M13/353

Abstract: Systems and methods of transmitting includes one or more low-density parity-check (LDPC) encoders configured to adaptively encode one or more streams of input data by adjusting error correction strength based upon channel conditions. One or more mappers are configured to map one or more encoded data streams to symbols by associating bits of the symbols to points of an optimum signal constellation design (OSCD) based on one or more encoded data streams, the OSCD being decomposed into two or more sub-constellations. A spectral multiplexer is configured to combine symbol streams for the one or more encoded data streams to provide a plurality of spectral band groups. A mode multiplexer is configured to combine spectral contents of the plurality of spectral band groups allocated to a plurality of spatial modes for transmission over a transmission medium.

Abstract translation: 发送系统和方法包括一个或多个低密度奇偶校验（LDPC）编码器，其被配置为通过基于信道条件调整误差校正强度来自适应地编码一个或多个输入数据流。 一个或多个映射器被配置为通过将符号的位与基于一个或多个编码数据流的最佳信号星座图设计（OSCD）的点相关联来将一个或多个编码数据流映射到符号，OSCD被分解为两个或更多个 分星座。 频谱复用器被配置为组合用于一个或多个编码数据流的符号流以提供多个频谱带组。 模式多路复用器被配置为组合分配给多个空间模式的多个频谱带组的频谱内容以便在传输介质上传输。

公开(公告)号：US20140099103A1

公开(公告)日：2014-04-10

申请号：US13903508

申请日：2013-05-28

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B. Djordjevic ,  Ting Wang

IPC: H04B10/2507

CPC classification number: H04B10/2507 ,  H04B10/616 ,  H04B10/6165

Abstract: Methods and systems for decoding a signal include compensating for impairments in a received signal using at least carrier phase estimation, where residual phase error remains after compensation; calculating symbol log-likelihood ratios (LLRs) for symbols in the compensated signal using Monte Carlo integration; demapping the symbols in the compensated signal using the symbol LLRs and extrinsic information from signal decoding to produce one or more estimated codewords; and decoding each estimated codeword with a decoder that generates a decoded codeword and extrinsic information.

Abstract translation: 用于对信号进行解码的方法和系统包括使用至少载波相位估计补偿接收信号中的损伤，其中在补偿之后残留相位误差; 使用蒙特卡罗积分计算补偿信号中的符号的符号对数似然比（LLR）; 使用来自信号解码的符号LLR和外在信息对补偿信号中的符号进行解映射以产生一个或多个估计码字; 以及用生成解码码字和外在信息的解码器解码每个估计码字。

公开(公告)号：US10234633B2

公开(公告)日：2019-03-19

申请号：US15907864

申请日：2018-02-28

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan B. Djordjevic ,  Shaoliang Zhang ,  Ting Wang

IPC: H04J14/02 ,  G02B6/35 ,  H04Q11/00 ,  G01D5/26 ,  G01D5/353 ,  H04L29/08 ,  G02B5/32 ,  G02B26/08 ,  H04J14/06 ,  H04W84/18 ,  H04L29/06 ,  H04W4/90

Abstract: A four-dimensional multiplexing method and four-dimensional multiplexing system are provided for optical networks. The method includes receiving sensor data to be transmitted on an optical network. The method also includes encoding the sensor data into an optical signal employing one or more multiplexing systems. The method additionally includes transmitting the optical signal over the optical network. The method further includes decoding the optical signal into the sensor data employing the one or more multiplexing systems. The method also includes controlling an operation of a processor-based machine responsive to the sensor data.

公开(公告)号：US20180269972A1

公开(公告)日：2018-09-20

申请号：US15922197

申请日：2018-03-15

Applicant: NEC LABORATORIES AMERICA, INC.

Inventor： Ivan B. Djordjevic ,  Shaoliang Zhang ,  Ting Wang

IPC: H04B10/2575 ,  H04B7/0413 ,  H04B10/516 ,  H04B10/11

CPC classification number: H04B10/2575 ,  H04B7/0413 ,  H04B10/11 ,  H04B10/1129 ,  H04B10/25752 ,  H04B10/516 ,  Y02D70/10 ,  Y02D70/12 ,  Y02D70/1262 ,  Y02D70/146 ,  Y02D70/21 ,  Y02D70/22 ,  Y02D70/46

Abstract: Aspects of the present disclosure describe systems, methods, and structures that advantageously provide hybrid free-space optical (FSO)-radio frequency (RF) communication links (HFRCLs) that enable building integrated software-defined network (SDN) infrastructure capable of integrating ultra-high-throughput satellite networks, composite wireless infrastructures, heterogeneous networks (HetNets), hybrid networks, satellite networks, and fiber-optics networks—among others.