公开(公告)号：US10476599B2

公开(公告)日：2019-11-12

申请号：US15483587

申请日：2017-04-10

Applicant: NEC Laboratories America, Inc.

Inventor： Ting Wang ,  Ivan Djordjevic

IPC: H04B10/04 ,  H04B10/516 ,  H04B10/61 ,  H03M13/25 ,  H04J14/06 ,  H03M13/00 ,  H04B10/532 ,  H04B10/54 ,  H03M7/30

Abstract: A method for optical communication includes combining jointly source coding with LDPC channel coding into a nonuniform signalling by mapping low-complexity variable-length prefix codes onto a constellation; and performing arbitrary nonuniform signalling, where information bits and parity bits are transmitted with different modulation schemes.

公开(公告)号：US20190236477A1

公开(公告)日：2019-08-01

申请号：US16229676

申请日：2018-12-21

Applicant: NEC Laboratories America, Inc.

Inventor： Ming-Fang Huang ,  Ting Wang

IPC: G06N20/00 ,  G08G1/01 ,  H04B10/25 ,  G01H9/00 ,  G01M3/38

CPC classification number: G06N20/00 ,  G01H9/004 ,  G01M3/38 ,  G08G1/0116 ,  H04B10/25

Abstract: A fiber-based roadside condition sensing system is provided. The system includes a fiber optic cable arranged in various roadside locations for Distributed Vibration Sensing (DVS) and Distributed Acoustic Sensing (DAS) at the various roadside locations. The system further includes a machine-learning-based analyzer for selectively providing any of an early warning and a prevention of various detected conditions responsive to a machine-learning-based analysis of results from the DVS and the DAS.

公开(公告)号：US10162121B2

公开(公告)日：2018-12-25

申请号：US15907777

申请日：2018-02-28

Applicant: NEC Laboratories America, Inc.

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

IPC: G02B6/35

Abstract: A method and switch are provided for reconfigurable optical space switch. The method includes receiving a control signal, from a controller, to configure a path through the reconfigurable optical space switch. The method also includes applying a voltage to one or more direction changing devices at each intersection between each of the east-west optical waveguides and each of the north-south optical waveguides to form the path through the reconfigurable optical space switch. The method additionally includes receiving an optical signal in one of a plurality of passive waveguides at a beginning of the path, including the plurality of east-west optical waveguides and the plurality of north-south optical waveguides. The method further includes outputting the optical signal out on of the plurality of passive waveguides at an end of the path.

公开(公告)号：US20180252870A1

公开(公告)日：2018-09-06

申请号：US15907777

申请日：2018-02-28

Applicant: NEC Laboratories America, Inc.

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

IPC: G02B6/35

CPC classification number: G01D5/35383 ,  G01D5/268 ,  G02B5/32 ,  G02B6/3512 ,  G02B6/3546 ,  G02B6/356 ,  G02B6/3584 ,  G02B26/0833 ,  H04J14/06 ,  H04L63/0428 ,  H04L67/12 ,  H04Q11/0005 ,  H04Q11/0062 ,  H04Q2011/0024 ,  H04Q2011/0081 ,  H04Q2011/0088 ,  H04Q2011/0094 ,  H04W4/90 ,  H04W84/18

Abstract: A method and switch are provided for reconfigurable optical space switch. The method includes receiving a control signal, from a controller, to configure a path through the reconfigurable optical space switch. The method also includes applying a voltage to one or more direction changing devices at each intersection between each of the east-west optical waveguides and each of the north-south optical waveguides to form the path through the reconfigurable optical space switch. The method additionally includes receiving an optical signal in one of a plurality of passive waveguides at a beginning of the path, including the plurality of east-west optical waveguides and the plurality of north-south optical waveguides. The method further includes outputting the optical signal out on of the plurality of passive waveguides at an end of the path.

公开(公告)号：US20180252557A1

公开(公告)日：2018-09-06

申请号：US15907864

申请日：2018-02-28

Applicant: NEC Laboratories America, Inc.

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

IPC: G01D5/353 ,  G01D5/26 ,  G02B26/08 ,  G02B5/32

CPC classification number: G01D5/35383 ,  G01D5/268 ,  G02B5/32 ,  G02B6/3512 ,  G02B6/3546 ,  G02B6/356 ,  G02B6/3584 ,  G02B26/0833 ,  H04J14/06 ,  H04L63/0428 ,  H04L67/12 ,  H04Q11/0005 ,  H04Q11/0062 ,  H04Q2011/0024 ,  H04Q2011/003 ,  H04Q2011/0064 ,  H04Q2011/0081 ,  H04Q2011/0088 ,  H04Q2011/0094 ,  H04W4/90 ,  H04W84/18

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：US20180234236A1

公开(公告)日：2018-08-16

申请号：US15897930

申请日：2018-02-15

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan Djordjevic ,  Ting Wang ,  Shaoliang Zhang

IPC: H04L9/08 ,  H04J14/02 ,  H04B10/70

CPC classification number: H04L9/0852 ,  H01Q3/26 ,  H01Q3/28 ,  H01Q3/34 ,  H01Q3/38 ,  H01Q21/00 ,  H04B7/0413 ,  H04B10/11 ,  H04B10/505 ,  H04B10/516 ,  H04B10/70 ,  H04J14/0227 ,  H04J14/0298 ,  H04J14/04 ,  H04L27/345 ,  H04L27/3477 ,  H04L27/36 ,  H04L27/362 ,  H04L27/38

Abstract: Systems and methods for quantum key distribution using orbital angular momentum (OAM)-modes-enabled secure multidimensional coded modulation. The quantum key distribution including symbols of a raw key across subcarriers and multiplexing the subcarriers to form an electrical carrier. Then optically modulating the electrical carrier with an electro-optical modulator using an optical signal. The optically modulated electrical carrier is then imposed on a pre-determined OAM mode using an optical OAM multiplexer, attenuated, and transmitted across a quantum channel. A receiver then receives the transmitted signal and demultiplexes it with an optical OAM demultiplexer to extract projections. The projections then undergo optical-to-electrical conversion using a coherent optical detector with an optical signal from a local oscillator. A resulting estimated electrical carrier is then demultiplexed into subcarriers. The subcarrier undergo phase noise cancellation and subsequent demodulation to extract estimated symbol constellation points corresponding the symbols of the raw key.

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

IPC: H03M13/11 ,  H03M13/29 ,  H03M13/00 ,  H04L1/00 ,  H04B10/27

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.

公开(公告)号：US09810627B2

公开(公告)日：2017-11-07

申请号：US15269586

申请日：2016-09-19

Applicant: NEC Laboratories America, Inc.

Inventor： Ming-Fang Huang ,  Lei Tao ,  Yue Tian ,  Ting Wang

IPC: G01N21/00 ,  G01N21/59 ,  B60R11/04 ,  B64B1/40 ,  B64C39/02 ,  G01S3/786 ,  G01S17/06 ,  G01S19/13 ,  G01S17/66 ,  G01S17/88 ,  G01S7/48 ,  G01N33/00 ,  G01N21/17

CPC classification number: G01N21/59 ,  B60R11/04 ,  B64B1/40 ,  B64C39/024 ,  B64C2201/12 ,  G01N33/0062 ,  G01N2021/1795 ,  G01N2201/061 ,  G01N2201/06113 ,  G01N2201/0612 ,  G01N2201/062 ,  G01N2201/0636 ,  G01S3/786 ,  G01S7/4802 ,  G01S17/06 ,  G01S17/66 ,  G01S17/88 ,  G01S19/13

Abstract: Systems and methods for generating a three-dimensional gas map includes a remote vehicle including reflective material. A positioning stage including multidimensional movement to track the remote vehicle. A light head to reflect light off of the remote vehicle. A controller to analyze received light to determine gas content and generate a three-dimensional gas map.

公开(公告)号：US09742489B2

公开(公告)日：2017-08-22

申请号：US14961236

申请日：2015-12-07

Applicant: NEC Laboratories America, Inc.

Inventor： Yawei Yin ,  Konstantinos Kanonakis ,  Philip Ji ,  Ting Wang ,  Shinya Nakamura

IPC: H04B10/038 ,  H04B10/032 ,  H04B10/079 ,  H04Q11/00

CPC classification number: H04B10/038 ,  H04B10/032 ,  H04B10/0793 ,  H04B10/0795 ,  H04B10/07955 ,  H04Q11/0005

Abstract: Systems and methods are disclosed for data communication by forming a hybrid that includes an electrical switching network with packet granularity of switching and store-and-forward forwarding services to network traffic and an optical switching network providing circuit granularity of switching and optical bypassing services to network traffic; applying local control of optical switching modules in the optical switching network with a network controller coupled to the electrical switching network, the optical switching network, and a loss-of-light detection module; and detecting loss-of-light in a failure point in the optical switching network and rerouting traffic to avoid the optical failure point.

公开(公告)号：US09735921B2

公开(公告)日：2017-08-15

申请号：US15138184

申请日：2016-04-25

Applicant: NEC Laboratories America, Inc.

Inventor： Ivan Djordjevic ,  Ting Wang

IPC: H04B10/04 ,  H04L1/00 ,  H03M13/11 ,  H04B10/516

CPC classification number: H04L1/0058 ,  H03M13/1102 ,  H04B10/516 ,  H04L1/0041 ,  H04L1/0057

Abstract: A low-density parity-check (LDPC) coded bit-interleaved coded modulation with iterative decoding (BICM-ID) scheme with nonuniform signaling which is effected by mapping simple variable-length prefix codes onto the constellation. By employing Huffman procedure(s), prefix codes can be designed to approach optimal performance. Experimental evaluations of the schemes demonstrate that the nonuniform scheme performs better than 8-QAM by at least 8.8 dB.