中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

174 records (took 0.025 seconds)

    System and methods for high symbol-rate optical nyquist signal generation with roll-off factor approaching zero
    1.
    发明授权
    System and methods for high symbol-rate optical nyquist signal generation with roll-off factor approaching zero 有权

    公开(公告)号：US10411809B2

    公开(公告)日：2019-09-10

    申请号：US15334417

    申请日：2016-10-26

    Applicant: ZTE (USA) Inc.

    Inventor： Jianjun Yu ,  Junwen Zhang

    IPC: H04B10/54 ,  H04J14/02 ,  H04B10/548

    Abstract: Disclosed systems, methods, and computer program products enable high symbol-rate optical Nyquist signal generation with roll-off factors approaching zero by combining digital and all-optical methods. The combined digital and all-optical methods utilize all-optical sine-shaped pulse generation and orthogonal time-division multiplexing with quadrature amplitude modulation using digital Nyquist signals. Disclosed embodiments exhibit inter-channel-interference penalties that are less than 0.5-dB for both 75-GBaud and 125-GBaud optical Nyquist signals, in contrast to conventional signals generated using rectangular waveform driving signals that exhibit penalties greater than 2.5-dB and 1.5-dB for 75-GBaud and 125-GBaud signals, respectively. The disclosed embodiments, therefore, enable significant improvement over conventional systems by reducing inter-channel-interference penalties caused by excess modulation induced bandwidth.

    Method and apparatus of downstream forward error correction on-off control in XG-PON1 and NG-PON2 TWDM-PON systems
    4.
    发明授权
    Method and apparatus of downstream forward error correction on-off control in XG-PON1 and NG-PON2 TWDM-PON systems 有权

    公开(公告)号：US10044467B2

    公开(公告)日：2018-08-07

    申请号：US14767838

    申请日：2014-02-25

    Applicant: ZTE (USA) INC.

    Inventor： Denis A. Khotimsky

    IPC: H04L1/00 ,  H03M13/05 ,  H03M13/15 ,  H03M13/35 ,  H03M13/00

    Abstract: An apparatus and method for receiving and transmitting data is disclosed. In one exemplary embodiment, the method includes: controlling a data source output source frames at a first data rate; receiving a source frame at an encoder at the first data rate; reading a fixed number of n-byte data blocks from the source frame, wherein n is an integer; appending an (m-n)-byte parity block to each n-byte data block to form the fixed number of m-byte first code words, wherein m is an integer greater than n; prepending to the fixed number of m-byte first code words a first prefix to form an error correcting physical frame, the first prefix including an error correction indicator set to a first value and an extra data indicator set to a second value; and transmitting the error correcting physical frame at a fixed transmit data rate.

    Directly-modulated multi-polarization optical transmitters
    7.
    发明授权
    Directly-modulated multi-polarization optical transmitters 有权

    公开(公告)号：US09880351B2

    公开(公告)日：2018-01-30

    申请号：US14254296

    申请日：2014-04-16

    Applicant: ZTE (USA) INC.

    Inventor： Hung-Chang Chien ,  Zhensheng Jia ,  Jianjun Yu

    IPC: H04B10/00 ,  G02B6/10 ,  H04B10/50 ,  H04B10/532 ,  H04B10/556

    CPC classification number: G02B6/105 ,  H04B10/5053 ,  H04B10/532 ,  H04B10/5561

    Abstract: The present invention relates to optical transmitters, transceivers, and transponders used for transmission of information or data in any form through a physical medium dependent (PMD) network. The speed of such networks depends, in part, on the density of information that can be transmitted through the physical medium. Optical transmitters or transceivers can be used to transmit multiple independent signals simultaneously through the same medium using different directions or axes of polarization, where the difference in the directions or axes of polarization can be used to distinguish the multiple signals at the receiver. In this invention, we use a master laser (l0) to synchronize two slave lasers (l1 and l2) by its x-polarization and y-polarization components of carrier, respectively, so that two slave lasers can be enforced to lock on exactly the same wavelength l0 with perpendicular polarization directions.

    FULL DUPLEX OPERATION IN A WIRELESS NETWORK
    9.
    发明申请
    FULL DUPLEX OPERATION IN A WIRELESS NETWORK 审中-公开
    无线网络全双工操作

    公开(公告)号：US20170078076A1

    公开(公告)日：2017-03-16

    申请号：US15236330

    申请日：2016-08-12

    Applicant: ZTE Corporation ,  ZTE (USA) Inc.

    Inventor： Yonggang Fang ,  Li Zhang ,  Bo Sun ,  Kaiying Lv ,  Nan Li

    IPC: H04L5/14 ,  H04W74/08 ,  H04J11/00

    CPC classification number: H04L5/14 ,  H04J11/0023 ,  H04L12/413 ,  H04W74/002 ,  H04W74/0808 ,  H04W76/00 ,  H04W84/12

    Abstract: Multiple wireless devices in a network perform full duplex communication in which the transmission path and receiving path are spatially separated to allow simultaneous transmission and receiving. The wireless devices can either be controlled using a centralized, or point, coordination function or a distributed coordination function. A full-duplex wireless device senses the medium during transmission by itself and selectively continues the transmission when a signal is sensed on the medium. A full-duplex wireless device measures signal being transmitted by its transmitter and estimates parameters that can be used to cancel the contribution of the locally transmitted signal to the locally received signal concurrently being received during the transmission. The transmit antenna and the receive antenna of a full-duplex wireless device can be configured to be spatially isolated from each other to minimize interference between the antenna functions.

    Abstract translation: 网络中的多个无线设备执行全双工通信，其中传输路径和接收路径在空间上分离以允许同时发送和接收。 无线设备可以使用集中式或点式协调功能或分布式协调功能进行控制。 全双工无线设备在传输期间自身感测介质，并且当在介质上感测到信号时选择性地继续传输。 全双工无线设备测量由其发射机发送的信号，并且估计可以用于在传输期间同时接收到的本地发送信号对本地接收信号的贡献的参数。 全双工无线设备的发射天线和接收天线可被配置为在空间上彼此隔离以最小化天线功能之间的干扰。

Patent Agency Ranking