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    METHOD AND SYSTEM FOR DISCRETE MULTI-TONE TRANSMISSION WITH MULTIPLE MODULATIONS
    4.
    发明公开
    METHOD AND SYSTEM FOR DISCRETE MULTI-TONE TRANSMISSION WITH MULTIPLE MODULATIONS 审中-公开
    具有多个调制的离散多音调传输的方法和系统

    公开(公告)号：EP3235146A1

    公开(公告)日：2017-10-25

    申请号：EP15877676.5

    申请日：2015-12-15

    Applicant: Huawei Technologies Co. Ltd.

    Inventor： LI, Chuandong ,  ZHANG, Zhuhong ,  ZAMANI, Mahdi

    IPC: H04B10/25 ,  H04L27/00 ,  H04L1/00

    CPC classification number: H04B10/5161 ,  H04L27/2601

    Abstract: Optical network devices and method for optical network communications in discrete multi-tone (DMT) are provided. A serial information signal is converted to groups of bits and loaded to parallel processing branches based on bit rates of the parallel processing branches. Each branch is configured to encode the associated group of data bits on the associated tone. A first bit rate and modulation and power allocation to a first branch of the branches may be different from a second bit rate and modulation and power allocation to a second branch of the branches. To recover the incoming data, the encoded signal may be parallel-processed using branches with different demodulation formats and provide the serial data stream.

    Abstract translation: 提供了用于离散多音频（DMT）中的光网络通信的光网络设备和方法。 串行信息信号被转换成位组并且根据并行处理分支的位速率加载到并行处理分支。 每个分支被配置为在相关联的音调上对关联的数据比特组进行编码。 对分支的第一分支的第一比特率和调制和功率分配可以不同于对分支的第二分支的第二比特率和调制和功率分配。 为了恢复输入数据，编码信号可以使用不同解调格式的分支进行并行处理，并提供串行数据流。

    BIT LOADING FOR OPTICAL DISCRETE MULTI-TONE TRANSMISSION
    6.
    发明公开
    BIT LOADING FOR OPTICAL DISCRETE MULTI-TONE TRANSMISSION 审中-公开
    BIT加载用于光学离散多音调传输

    公开(公告)号：EP3050269A1

    公开(公告)日：2016-08-03

    申请号：EP14846562.8

    申请日：2014-09-22

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： CHEN, Chen ,  ZAMANI, Mahdi ,  ZHANG, Zhuhong ,  LI, Chuandong

    IPC: H04L27/28 ,  H04B1/38

    CPC classification number: H04B10/2507 ,  H04B10/2575 ,  H04B10/40 ,  H04B10/506 ,  H04B10/516 ,  H04B10/541 ,  H04B10/548 ,  H04B10/556 ,  H04B10/697 ,  H04L5/0046

    Abstract: System and method embodiments are provided for bit loading for optical Discrete Multi-Tone Transmission (DMT). In an embodiment, a method for bit loading for optical DMT transmission or reception includes receiving, at a processor, a bit data stream, wherein the bit data stream comprises a plurality of subcarriers; assigning, with the processor, a code rate to each of a plurality of forward error correction (FEC) encoders/decoders according to a mapping of a signal-to-noise-ratio (SNR) to a code rate for each of the subcarriers or subcarrier groups, wherein each FEC encoder/decoder corresponds to a respective one of the subcarriers or a respective subcarrier group; and assigning, with the processor, a modulation format to each subcarrier or each subcarrier group according to a mapping of an SNR for each subcarrier or subcarrier group to a bit number for a corresponding subcarrier or subcarrier group.

    Abstract translation: 系统和方法实施例被提供用于光学离散多音调传输（DMT）的比特加载。 在一个实施例中，一种用于光DMT传输或接收的比特加载的方法包括：在处理器处接收比特数据流，其中所述比特数据流包括多个子载波; 利用处理器，根据信噪比（SNR）与每个子载波的码率的映射，将码率分配给多个前向纠错（FEC）编码器/解码器中的每一个;或者 子载波组，其中每个FEC编码器/解码器对应于所述子载波中的相应子载波或相应的子载波组; 以及利用所述处理器，根据每个副载波或副载波组的SNR与相应副载波或副载波组的比特数的映射，将调制格式分配给每个副载波或每个副载波组。

    CLOCK SYNCHRONIZATION DEVICE, OPTICAL TRANSMITTER, OPTICAL RECEIVER AND METHOD
    7.
    发明公开
    CLOCK SYNCHRONIZATION DEVICE, OPTICAL TRANSMITTER, OPTICAL RECEIVER AND METHOD 审中-公开

    公开(公告)号：EP3975456A1

    公开(公告)日：2022-03-30

    申请号：EP20827949.7

    申请日：2020-06-16

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： CHEN, Jun ,  ZHANG, Zhuhong ,  LI, Chuandong ,  WAN, Jin ,  YONG, Zhikui

    IPC: H04J3/06

    Abstract: A clock synchronization apparatus, an optical transmitter, an optical receiver, and a clock synchronization method are provided, to implement flexible application to application scenarios with different transmission bandwidths. In the clock synchronization apparatus, a digital interpolator adjusts a sampling clock frequency of a digital signal under sampling clock control of a clock control circuit. Therefore, the clock synchronization apparatus adaptively tracks and adjusts a sampling clock frequency without relying on a sampling frequency of a peripheral clock circuit, to ensure clock synchronization, thereby supporting flexible application to application scenarios with different bandwidth requirements.

    METHOD AND APPARATUS FOR RECOVERING TIME-DOMAIN HYBRID MODULATED QAM SIGNALS
    10.
    发明公开
    METHOD AND APPARATUS FOR RECOVERING TIME-DOMAIN HYBRID MODULATED QAM SIGNALS 审中-公开
    方法和装置用于回收HYBRIDS次现场调制式QAM信号

    公开(公告)号：EP3146690A1

    公开(公告)日：2017-03-29

    申请号：EP15809046.4

    申请日：2015-06-16

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： ZHANG, Zhuhong ,  LI, Chuandong

    IPC: H04L27/34 ,  H04B10/2569

    CPC classification number: H04L27/38 ,  H04B10/2569 ,  H04B10/6971 ,  H04L25/03891 ,  H04L27/0008 ,  H04L27/0014 ,  H04L27/3488 ,  H04L2027/0038 ,  H04L2027/0057 ,  H04L2027/0067

    Abstract: A method for recovering a quadrature amplitude modulated (QAM) signal is disclosed. The method includes receiving a QAM signal at a demultiplexers, where the QAM signal comprises multiple modulation schemes, splitting the QAM signal into k branches, where k is the number of QAM modulation schemes of the signal, passing the branch having the lowest order QAM modulation scheme to a first equalizer for recovering and tracking polarization and compensating polarization mode dispersion (PMD), updating a tap updating algorithm with a recovery value determined by the first equalizer, and recovering and tracking polarization and compensating PMD for all other branches based on the recovery value.

    Abstract translation: 一种用于恢复调制的正交调幅方式（QAM）信号游离缺失盘。 该方法包括在一个多路分解器，其中，所述QAM信号包括多个调制方案接收一个QAM信号，分裂QAM信号成k个分支，其中k是所述信号的QAM调制方案的数目，使具有最低阶QAM调制的分支 方案的第一均衡器用于恢复和跟踪偏振和补偿偏振模色散（PMD），更新抽头与由第一均衡器开采回收价值确定性更新算法，以及回收和跟踪偏振和基于恢复补偿PMD对于所有其他分支 值。

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