-
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。
-
公开(公告)号：US12198361B2
公开(公告)日：2025-01-14
申请号：US17321479
申请日：2021-05-16
Applicant: NEC Laboratories America, Inc.
Inventor： Yue Tian , Ting Wang , Shengtao Sun
Abstract: Aspects of the present disclosure describe systems, methods, and structures for anti-spoofing 3D face reconstruction using infrared structured light that advantageously reconstructs 3D face structures for facial recognition and detect face surface material(s) such that human skin may be effectively distinguished from artifacts thereby providing additional security for facial recognition including immunity from 2D/3D print attacks including face masks and special make-ups.
-
公开(公告)号：US12078528B2
公开(公告)日：2024-09-03
申请号：US17869763
申请日：2022-07-20
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang Huang , Shaobo Han , Yuheng Chen , Milad Salemi , Ting Wang
CPC classification number: G01H9/004 , G01D5/35361
Abstract: Systems, and methods for automatically identifying an underground optical fiber cable length from DFOS systems in real time and pair it with GPS coordinates that advantageously eliminate the need for in-field inspection/work by service personnel to make such real-time distance/location determinations. As such, inefficient, error-prone and labor-intensive prior art methods are rendered obsolete. Operationally, our method disclosure involves driving vehicles including GPS to generate traffic patterns and automatically mapping traffic trajectory signals from a deployed buried fiber optic cable to locate geographic location(s) of the buried fiber optic cable. Traffic patterns are automatically recognized; slack in the fiber optic cable is accounted for; location of traffic lights and other traffic control devices/structures may be determined; and turns in the fiber optic cable may likewise be determined.
-
公开(公告)号：US11885670B2
公开(公告)日：2024-01-30
申请号：US17195544
申请日：2021-03-08
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang Huang , Ting Wang
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously are employed in smart stadium or other venue applications, such applications including: parking lot security and management; intrusion detection; social sensing; air quality monitoring and early fire detection—among others.
-
225.发明公开公开(公告)号：US20230366726A1
公开(公告)日：2023-11-16
申请号：US18316205
申请日：2023-05-11
Applicant: NEC Laboratories America, Inc.
Inventor： Shaobo HAN , Ming-Fang HUANG , Ting Wang
IPC: G01H9/00
CPC classification number: G01H9/004
Abstract: A distributed fiber optic sensing (DFOS) system and method employing a fiber optic sensor cable that autonomously collects DFOS data and employs artificial intelligence/machine learning (AI/ML) to distinguish sections of the fiber optic sensor cable that are above ground (aerial), below ground (buried), and buried but occasionally above ground, in addition to any change(s) that occur with respect to the fiber optic sensor cable at such sections.
-
Patent Agency Ranking
公开(公告)号：US11783452B2
公开(公告)日：2023-10-10
申请号：US17221814
申请日：2021-04-04
Applicant: NEC Laboratories America, Inc.
Inventor： Philip Ji , Eric Cosatto , Ting Wang
IPC: G06T5/00 , G08G1/04 , G06V20/54 , G06T11/20 , G06T5/20 , H04B10/071 , G06V10/44 , G06F18/232 , G06V10/764
CPC classification number: G06T5/002 , G06F18/232 , G06T5/20 , G06T11/203 , G06V10/457 , G06V10/764 , G06V20/54 , G08G1/04 , H04B10/071 , G06T2207/20081 , G06T2207/20084 , G06T2207/30236
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously provide traffic monitoring, and traffic management which improves the safety and efficiency of a roadway.
-
227.发明授权公开(公告)号：US11698289B2
公开(公告)日：2023-07-11
申请号：US17555924
申请日：2021-12-20
Applicant: NEC Laboratories America, Inc.
Inventor： Junqiang Nochur Hu , Ting Wang , Shuji Murakami
IPC: G01H9/00
CPC classification number: G01H9/004
Abstract: A method providing an increased signal-to-noise (SNR) characteristic for coherent distributed acoustic sensing (DAS) systems, the method employing fiber coils (microphones) made from sections of an optical sensing fiber that collect acoustic signals and uses multiple differential pairs of the microphones for signal averaging to improve the SNR. An analysis determines complex products (beating products) for a pair of locations that are part of a fiber microphone along the length of the optical sensing fiber that are used to determine a phase change in-between locations along the length of the optical sensing fiber.
-
228.发明授权公开(公告)号：US11543286B2
公开(公告)日：2023-01-03
申请号：US17227328
申请日：2021-04-11
Applicant: NEC Laboratories America, Inc.
Inventor： Sarper Ozharar , Yue Tian , Yangmin Ding , Ting Wang
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS)-distributed acoustic sensing (DAS) based systems, methods, and structures that advantageously enable and/or facilitate the monitoring of civil infrastructures via acoustic wave speed measurements.
-
公开(公告)号：US11284173B2
公开(公告)日：2022-03-22
申请号：US17221820
申请日：2021-04-04
Applicant: NEC Laboratories America, Inc.
Inventor： Ming-Fang Huang , Ting Wang
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously utilize existing telecommunications facilities that serve as not only to convey telecommunications traffic—but as a sensor medium providing useful sensory information. In sharp contrast to the prior art—a DFOS system when so deployed may advantageously exploit network topologies and optical switches to provide novel sensing features including the detection of environmental events including acoustic, temperature, and vibrational events that may be indicative of societal activity including traffic and/or emergency events.
-
230.发明申请公开(公告)号：US20210318163A1
公开(公告)日：2021-10-14
申请号：US17227313
申请日：2021-04-10
Applicant: NEC Laboratories America, Inc.
Inventor： Yangmin DING , Yue TIAN , Sarper Ozharar , Ting Wang
Abstract: Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously enable and/or facilitate the continuous monitoring and identification of damaged utility poles by employing a DFOS distributed acoustic sensing (DAS) methodology in conjunction with a finite element analysis and operational modal analysis. Of particular advantage and in further contrast to the prior art, systems, methods, and structures according to aspects of the present disclosure utilize existing optical fiber supported/suspended by the utility poles as a sensing medium for the DFOS/DAS operation.
-
-
-
-
-
-
-
-
-
Search Results
264
records
(took 0.04 seconds)
