利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

8 条记录 (耗时 0.01 秒)

    Methods and apparatus for achieving multiple bit rates in passive optical networks
    2.
    发明授权
    Methods and apparatus for achieving multiple bit rates in passive optical networks 有权
    在无源光网络中实现多个比特率的方法和装置

    公开(公告)号：US08712243B2

    公开(公告)日：2014-04-29

    申请号：US11015152

    申请日：2004-12-17

    申请人： Hungkei Keith Chow ,  Manyalibo Joseph Matthews ,  Dusan Suvakovic ,  Doutje T. Van Veen

    发明人： Hungkei Keith Chow ,  Manyalibo Joseph Matthews ,  Dusan Suvakovic ,  Doutje T. Van Veen

    IPC分类号： H04J14/08 ,  H04B10/00

    CPC分类号： H04J3/1694 ,  H04L7/033

    摘要： Systems and techniques for multiple bit rate optical data transmission. A passive optical network includes an optical line termination unit (OLT) connected to one or more optical network units (ONUs) by optical elements. The OLT is capable of performing downstream transmission to the ONUs at each of a variety of different bit rates, and each ONU performs upstream transmission at one or more bit rates. The OLT can sense a bit rate of a received transmission and change its operation so as to receive and process the transmission exhibiting the sensed bit rate. Each of the ONUs receives and processes downstream transmissions at one or more bit rates, but each ONU is capable of maintaining a phase and frequency lock to downstream transmissions at all bit rates supported by the OLT. One or more of the ONUs may also receive and process downstream transmissions exhibiting different or changed bit rates.

    摘要翻译： 用于多比特率光数据传输的系统和技术。 无源光网络包括通过光学元件连接到一个或多个光网络单元（ONU）的光线路终端单元（OLT）。 OLT能够以各种不同比特率的每一个对ONU执行下行传输，并且每个ONU以一个或多个比特率执行上行传输。 OLT可以感测接收到的传输的比特率并改变其操作，以便接收和处理呈现感测到的比特率的传输。 每个ONU以一个或多个比特速率接收和处理下游传输，但是每个ONU能够在由OLT支持的所有比特率下维持到下行传输的相位和频率锁定。 一个或多个ONU还可以接收和处理呈现不同或改变的比特率的下行传输。

    Short haul optical communications
    3.
    发明授权
    Short haul optical communications 有权
    短途光通信

    公开(公告)号：US07212746B2

    公开(公告)日：2007-05-01

    申请号：US10763895

    申请日：2004-01-23

    申请人： Manyalibo Joseph Matthews

    发明人： Manyalibo Joseph Matthews

    IPC分类号： H04B10/00

    CPC分类号： H04B10/2525

    摘要： Short haul optical communication networks using multi longitudinal mode lasers are susceptible to significant degradation from mode partition noise. Losses from such noise in short haul networks are substantially reducible by employing an additional fiber with specific properties. This additional fiber is chosen to have a slope for its wavelength versus dispersion behavior that is the negative of that for the transmission fiber.

    摘要翻译： 使用多纵模激光器的短距离光通信网络容易受到模式分区噪声的显着降低。 通过使用具有特定性能的附加纤维，可以大大减少短距离网络中的这种噪声的损失。 该附加光纤被选择为具有与其对于传输光纤的波长相反的色散特性的波长的斜率。

    Modulation phase shift to compensate for optical passband shift
    5.
    发明授权
    Modulation phase shift to compensate for optical passband shift 有权
    调制相移以补偿光通带移位

    公开(公告)号：US07403718B2

    公开(公告)日：2008-07-22

    申请号：US10128823

    申请日：2002-04-24

    申请人： Manyalibo Joseph Matthews ,  Chunhui Xu

    发明人： Manyalibo Joseph Matthews ,  Chunhui Xu

    IPC分类号： H04B10/04

    CPC分类号： H04B10/505 ,  H04B10/5057 ,  H04B10/50577 ,  H04B10/58

    摘要： Disclosed is a technique for compensating for optical passband shift of an optical component (for example an optical demultiplexer). A broadband source coupled to a dispersive element generates a chirped pulsed optical signal. Data is modulated onto particular wavelengths of the chirped pulsed optical signal by appropriately synchronizing a data modulator. The modulated signal is transmitted to the downstream optical demultiplexer, which may be subject to passband shift due to, for example, changes in environmental conditions. A feedback signal from an output port of the demultiplexer is provided to the transmitter and is used to phase shift the modulator. The phase shift results in effectively adjusting the wavelength onto which the data is modulated to substantially correspond to the passband centers of the demultiplexer.

    摘要翻译： 公开了一种用于补偿光学部件（例如光学解复用器）的光学通带偏移的技术。 耦合到分散元件的宽带源产生啁啾脉冲光信号。 通过适当地使数据调制器同步，将数据调制到啁啾脉冲光信号的特定波长上。 经调制的信号被传输到下游的光解复用器，由于例如环境条件的变化，其可能经受通带移位。 来自解复用器的输出端口的反馈信号被提供给发射机，并用于相位调制器。 相移导致有效地调整数据被调制到其上的波长基本对应于多路分解器的通带中心。

    Method and apparatus for multiphase, fast-locking clock and data recovery
    6.
    发明授权
    Method and apparatus for multiphase, fast-locking clock and data recovery 有权
    用于多相，快速锁定时钟和数据恢复的方法和装置

    公开(公告)号：US07242739B2

    公开(公告)日：2007-07-10

    申请号：US10460572

    申请日：2003-06-12

    申请人： Glenn M Boles ,  Alfred Earl Dunlop ,  Manyalibo Joseph Matthews ,  Dusan Suvakovic ,  Doutje T. Van Veen

    发明人： Glenn M Boles ,  Alfred Earl Dunlop ,  Manyalibo Joseph Matthews ,  Dusan Suvakovic ,  Doutje T. Van Veen

    IPC分类号： H03D3/24

    CPC分类号： H04L7/0338 ,  H04L7/042

    摘要： A method and apparatus for clock and data recovery that is advantageous in burst-mode systems is disclosed. This clock and data recovery method allows a) fast locking to a rapidly changed phase of the transmission clock, and b) stable tracking of a slowly changing phase of the transmission clock. Such fast locking minimizes the “guard band” between consecutive transmission bursts, while stable tracking provides reliable data tracking, resulting in the efficient use of bandwidth. A plurality of clock signals, is generated, each having a different phase. The phase of an input signal data stream is determined and a desired clock signal in the plurality that corresponds to the phase of the input data stream is selected and used to sample the input signal data stream.

    摘要翻译： 公开了一种在突发模式系统中有利的用于时钟和数据恢复的方法和装置。 该时钟和数据恢复方法允许a）快速锁定到传输时钟的快速变化的相位，以及b）稳定跟踪传输时钟的缓慢变化的相位。 这种快速锁定使连续传输突发之间的“保护带”最小化，而稳定跟踪提供可靠的数据跟踪，导致带宽的有效使用。 产生多个时钟信号，每个具有不同的相位。 确定输入信号数据流的相位，并且选择与输入数据流的相位相对应的多个中的期望时钟信号，并将其用于采样输入信号数据流。

    Clock, data and time recovery using bit-resolved timing registers
    8.
    发明授权
    Clock, data and time recovery using bit-resolved timing registers 有权
    使用位解析定时寄存器的时钟，数据和时间恢复

    公开(公告)号：US07123675B2

    公开(公告)日：2006-10-17

    申请号：US10255008

    申请日：2002-09-25

    申请人： Glenn M Boles ,  Alfred Earl Dunlop ,  Ilija Hadzic ,  Manyalibo Joseph Matthews ,  Dusan Suvakovic ,  Doutje T. Van Veen

    发明人： Glenn M Boles ,  Alfred Earl Dunlop ,  Ilija Hadzic ,  Manyalibo Joseph Matthews ,  Dusan Suvakovic ,  Doutje T. Van Veen

    IPC分类号： H04L7/00

    CPC分类号： H04J3/1694 ,  H04J3/0682 ,  H04L7/042

    摘要： A clock recovery method is disclosed wherein the FIFO delay of data words and the phase difference between a data word and a receiver clock are used to time data transmissions from a transmitter. The phase difference between the data word and the receiver clock is determined by the offset of a word relative to a desired position in a storage buffer. The FIFO delay is determined either by measuring the difference between a read pointer and a write pointer in the FIFO or, alternatively, by calculating the difference between a timestamp of the time a data word entered the FIFO and the current time as the data word is read from the FIFO.

    摘要翻译： 公开了一种时钟恢复方法，其中数据字的FIFO延迟和数据字与接收机时钟之间的相位差用于对发射机进行数据传输。 数据字和接收器时钟之间的相位差由字相对于存储缓冲器中的期望位置的偏移量确定。 通过测量FIFO中的读指针和写指针之间的差来确定FIFO延迟，或者通过计算数据字进入FIFO的时间与当前时间的时间戳之间的差， 从FIFO读取。