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    Digital Filter Arrangement for Compensating Group Velocity Dispersion in an Optical Transmission System
    1.
    发明申请
    Digital Filter Arrangement for Compensating Group Velocity Dispersion in an Optical Transmission System 有权

    公开(公告)号：US20230129067A1

    公开(公告)日：2023-04-27

    申请号：US18146176

    申请日：2022-12-23

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Stefano Calabro ,  Changsong Xie

    IPC: H04B10/2525

    Abstract: The present disclosure relates to a digital filter arrangement (DFA) for compensating group velocity dispersion (GVD) in an optical transmission system (OTS) wherein the DFA is configured to receive a sequence of samples of a digital input signal in the time domain in the form of consecutive blocks of size L. The DFA is configured to generate M discrete Fourier transforms of a current overlap block of a size N greater than the size L and of M−1 delayed versions of the current overlap block. The DFA is configured to filter the entries of the generated M discrete Fourier transforms to generate an output discrete Fourier transform with N entries, wherein the compensation filter is implemented by a delay network and a linear combination algorithm.

    High capacity optical data transmission using intensity-modulation and direct-detection
    2.
    发明授权
    High capacity optical data transmission using intensity-modulation and direct-detection 有权

    公开(公告)号：US11025405B2

    公开(公告)日：2021-06-01

    申请号：US16247368

    申请日：2019-01-14

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Nebojsa Stojanovic ,  Changsong Xie

    IPC: H04L7/00 ,  H04B10/69 ,  H04J14/02 ,  H04B10/54 ,  H04B10/61 ,  H04L1/00 ,  H04L25/03

    Abstract: The present invention relates to a multi-channel IM-DD optical transceiver comprising at least one transmitter and a receiver, and a method for equalizing input samples at an adjusted sampling phase using a quality parameter linearly proportional to a BER. The data transmission and reception use a single master channel and slave channels, which have a baud rate equal to or lower than the baud rate of the master channel. A reliable and identical clocking of all the channels is obtained through either the receiver clock of the master channel when they are received from a single transmitter or a reference clock whose frequency is higher than the highest clock frequency amongst all the channels when they are received from a combination of transmitters. An enhanced timing recovery circuit is also provided to select optimized finite impulse response filters, calculate filter coefficients and generate the receiver clock of the master channel.

    Optical receiver
    4.
    发明授权
    Optical receiver 有权
    光接收机

    公开(公告)号：US09531480B2

    公开(公告)日：2016-12-27

    申请号：US14633761

    申请日：2015-02-27

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Changsong Xie ,  Ming Chen

    IPC: H04B10/61

    CPC classification number: H04B10/6161 ,  H04B10/616 ,  H04B10/6162

    Abstract: The invention relates to an optical receiver for processing an optical receive signal the optical receiver comprising a fixed hardware circuit implementing a signal processing part for processing the optical receive signal using a processing parameter; a processor being configured to adaptively update the processing parameter; and a package to integrate the signal processing part and the processor into one chip.

    Abstract translation: 本发明涉及一种用于处理光接收信号的光接收机，该光接收机包括一个固定硬件电路，该固定硬件电路使用一个处理参数来处理光接收信号的信号处理部分; 处理器被配置为自适应地更新所述处理参数; 以及将信号处理部分和处理器集成到一个芯片中的封装。

    Optical Receiver
    5.
    发明申请
    Optical Receiver 有权
    光接收机

    公开(公告)号：US20150171972A1

    公开(公告)日：2015-06-18

    申请号：US14633761

    申请日：2015-02-27

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Changsong Xie ,  Ming Chen

    IPC: H04B10/61

    CPC classification number: H04B10/6161 ,  H04B10/616 ,  H04B10/6162

    Abstract: The invention relates to an optical receiver for processing an optical receive signal the optical receiver comprising a fixed hardware circuit implementing a signal processing part for processing the optical receive signal using a processing parameter; a processor being configured to adaptively update the processing parameter; and a package to integrate the signal processing part and the processor into one chip.

    Abstract translation: 本发明涉及一种用于处理光接收信号的光接收机，该光接收机包括一个固定硬件电路，该固定硬件电路使用一个处理参数来处理光接收信号的信号处理部分; 处理器被配置为自适应地更新所述处理参数; 以及将信号处理部分和处理器集成到一个芯片中的封装。

    OPTICAL CHANNEL SOUNDER
    7.
    发明申请
    OPTICAL CHANNEL SOUNDER 审中-公开
    光通道

    公开(公告)号：US20160065304A1

    公开(公告)日：2016-03-03

    申请号：US14934964

    申请日：2015-11-06

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Fabian Nikolaus Hauske ,  Changsong Xie

    IPC: H04B10/077 ,  H04B10/50 ,  H04B10/516

    CPC classification number: H04B10/0775 ,  H04B10/503 ,  H04B10/516 ,  H04B10/61

    Abstract: The present invention relates to an optical channel sounding transmitter apparatus, comprising an optical signal generator for generating an optical carrier signal; an optical modulator for modulating the optical carrier signal with a predetermined training sequence to obtain an modulated optical signal; a first optical transmitter for transmitting the optical carrier signal; and a second optical transmitter for transmitting the modulated optical signal. Further the present invention relates to a coherent optical channel sounding receiver apparatus, comprising a first optical receiver for receiving an optical carrier signal over a first optical channel; a second optical receiver for receiving a modulated optical signal over a second optical channel; an optical down converter for down converting the modulated optical signal using the received optical carrier signal to obtain a down converted signal; and a channel estimator for estimating a channel characteristic of the second optical channel.

    Abstract translation: 本发明涉及一种光信道探测发射机装置，包括：用于产生光载波信号的光信号发生器; 光调制器，用于以预定的训练序列调制光载波信号以获得调制的光信号; 用于发送光载波信号的第一光发射机; 以及用于发送调制光信号的第二光发射机。 此外，本发明涉及一种相干光信道探测接收机装置，包括：第一光接收机，用于通过第一光信道接收光载波信号; 第二光接收器，用于在第二光通道上接收经调制的光信号; 光学降压转换器，用于使用所接收的光载波信号下变频调制的光信号以获得降频转换的信号; 以及用于估计第二光信道的信道特性的信道估计器。

    DEVICE FOR MULTIPLEXING OR DEMULTIPLEXING POLARISED WAVES
    8.
    发明公开
    DEVICE FOR MULTIPLEXING OR DEMULTIPLEXING POLARISED WAVES 审中-公开

    公开(公告)号：US20240258673A1

    公开(公告)日：2024-08-01

    申请号：US18392765

    申请日：2023-12-21

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Christian BLÜMM ,  Changsong Xie ,  Alexander Dyck ,  Patrick Reynaert ,  Joren Vaes

    IPC: H01P3/16

    CPC classification number: H01P3/16

    Abstract: A dielectric waveguide for spatially separating two orthogonally polarised components of an electromagnetic wave from each other, or for forming an electromagnetic wave having two orthogonally polarised components by spatially combining two linearly polarised electromagnetic waves. The dielectric waveguide comprises a first branch for carrying a first linearly polarised wave and a second branch for carrying a second linearly polarised wave. The dielectric waveguide comprises a dual-polarisation port which comprises a first area and a second area. The first area and the second area of the dual-polarisation port are a cross-section of the first branch and a cross-section of the second branch, respectively, and may partially overlap.

    CHROMATIC DISPERSION PRE-COMPENSATION OVER BI-DIRECTIONAL OPTICAL LINK
    9.
    发明公开
    CHROMATIC DISPERSION PRE-COMPENSATION OVER BI-DIRECTIONAL OPTICAL LINK 审中-公开

    公开(公告)号：US20230403077A1

    公开(公告)日：2023-12-14

    申请号：US18449512

    申请日：2023-08-14

    Applicant: HUAWEI TECHNOLOGIES CO., LTD.

    Inventor： Stefano Calabro ,  Changsong Xie ,  Jinlong Wei

    IPC: H04B10/2513 ,  H04B10/25

    CPC classification number: H04B10/2513 ,  H04B10/2589

    Abstract: A method for optical communication between transceivers through an optical link for chromatic dispersion pre-compensation, includes generating and sending, by a second transceiver, a first CD pre-compensated optical signal and a second CD pre-compensated optical signal, to the first transceiver through the optical link. The method further includes receiving, by a first transceiver, the first and second CD pre-compensated optical signals, and calculating a first residual chromatic dispersion (RCD) value from the received first CD pre-compensated optical signal, and a second RCD value from the received second CD pre-compensated optical signal. The method further includes calculating, by the first transceiver, a third PCD filter using the first RCD value, and a fourth PCD filter using the second RCD value. The third PCD filter and the fourth PCD filters are used to generate and send two CD pre-compensated optical signals to the second transceiver, which provides tunable CD pre-compensation capability.

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