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132 条记录 (耗时 0.063 秒)

    Interference cancellation with time-varying interference and/or distortion
    114.
    发明授权
    Interference cancellation with time-varying interference and/or distortion 有权

    公开(公告)号：US08401132B2

    公开(公告)日：2013-03-19

    申请号：US12899997

    申请日：2010-10-07

    申请人： Thomas Joseph Kolze ,  Bruce J. Currivan

    发明人： Thomas Joseph Kolze ,  Bruce J. Currivan

    IPC分类号： H03D1/04 ,  H03H7/30

    CPC分类号： H04B1/1027 ,  H04L1/0056 ,  H04L25/03019 ,  H04L25/03038 ,  H04L25/03057 ,  H04L25/03286 ,  H04L2025/03414 ,  H04L2025/03496 ,  H04L2025/03617 ,  H04L2025/03636

    摘要： A communications receiver includes a noise analyzer to characterize the composition of the interference and/or distortion impressed onto a transmitted communications signal in the presence of one or more time-varying conditions. The noise analyzer may provide a selection signal indicating the composition of the interference and/or distortion impressed onto a transmitted communications signal in the presence of one or more time-varying conditions to be used by the communications receiver. In an exemplary embodiment, the communications receiver selects at least one set of filter coefficients to compensate for the interference and/or distortion impressed onto a transmitted communications signal in the presence of a particular time-varying interference and/or distortion condition. In another exemplary embodiment, the communications receiver selects a corresponding interference cancellation filter bank to compensate for the interference and/or distortion impressed onto a transmitted communications signal in the presence of the particular time-varying interference and/or distortion condition.

    Asymmetric multi-channel adaptive equalizer
    115.
    发明授权
    Asymmetric multi-channel adaptive equalizer 失效
    非对称多通道自适应均衡器

    公开(公告)号：US08160127B2

    公开(公告)日：2012-04-17

    申请号：US13020503

    申请日：2011-02-03

    申请人： Bruce J. Currivan ,  Loke Kun Tan ,  Thomas Joseph Kolze ,  Hanli Zou ,  Lin He

    发明人： Bruce J. Currivan ,  Loke Kun Tan ,  Thomas Joseph Kolze ,  Hanli Zou ,  Lin He

    IPC分类号： H03H7/30

    CPC分类号： H04L25/03057 ,  H04L27/0014 ,  H04L2027/003 ,  H04L2027/0038 ,  H04L2027/0053

    摘要： An apparatus is disclosed to compensate for non-linear effects resulting from the transmitter, the receiver, and/or the communication channel in a communication system. A receiver of the communication system contains an image cancellation module that compensates for images generated during the modulation and/or demodulation process. The image cancellation module includes a fine carrier correction loop to correct for frequency offsets between the transmitter and receiver. The image cancellation module includes a coarse acquisition mode and a decision directed mode. The decision directed mode allows for a larger signal-to-noise ratio for the receiver when compared against the coarse acquisition mode.

    摘要翻译： 公开了一种用于补偿由通信系统中的发射机，接收机和/或通信信道产生的非线性效应的装置。 通信系统的接收机包含补偿在调制和/或解调过程中产生的图像的图像消除模块。 图像消除模块包括精确的载波校正环路，以校正发射机和接收机之间的频率偏移。 图像消除模块包括粗略采集模式和决策指导模式。 当与粗略采集模式进行比较时，决定导向模式允许接收机具有更大的信噪比。

    Interference Cancellation with Time-Varying Interference and/or Distortion
    116.
    发明申请
    Interference Cancellation with Time-Varying Interference and/or Distortion 有权
    干扰消除与时变干扰和/或失真

    公开(公告)号：US20110021170A1

    公开(公告)日：2011-01-27

    申请号：US12899997

    申请日：2010-10-07

    申请人： Thomas Joseph Kolze ,  Bruce J. Currivan

    发明人： Thomas Joseph Kolze ,  Bruce J. Currivan

    IPC分类号： H04B1/10

    CPC分类号： H04B1/1027 ,  H04L1/0056 ,  H04L25/03019 ,  H04L25/03038 ,  H04L25/03057 ,  H04L25/03286 ,  H04L2025/03414 ,  H04L2025/03496 ,  H04L2025/03617 ,  H04L2025/03636

    摘要： A method and apparatus is disclosed to compensate for interference and/or distortion impressed onto a transmitted communications signal in the presence of one or more time-varying conditions. A communications receiver includes a noise analyzer to characterize the composition of the interference and/or distortion impressed onto a transmitted communications signal in the presence of one or more time-varying conditions. The noise analyzer may provide a selection signal indicating the composition of the interference and/or distortion impressed onto a transmitted communications signal in the presence of one or more time-varying conditions to be used by the communications receiver. In an exemplary embodiment, the communications receiver selects at least one set of filter coefficients to compensate for the interference and/or distortion impressed onto a transmitted communications signal in the presence of a particular time-varying interference and/or distortion condition. In another exemplary embodiment, the communications receiver selects a corresponding interference cancellation filter bank to compensate for the interference and/or distortion impressed onto a transmitted communications signal in the presence of the particular time-varying interference and/or distortion condition.

    摘要翻译： 公开了一种方法和装置，用于在存在一个或多个时变条件的情况下补偿在所发送的通信信号上施加的干扰和/或失真。 通信接收机包括噪声分析器，用于在存在一个或多个时变条件的情况下表征在所发送的通信信号上施加的干扰和/或失真的组成。 在由通信接收机使用的一个或多个时变条件的情况下，噪声分析器可以提供指示在所发送的通信信号上施加的干扰和/或失真的组成的选择信号。 在示例性实施例中，通信接收器在存在特定的时变干扰和/或失真条件的情况下，选择至少一组滤波器系数来补偿所发射的通信信号上的干扰和/或失真。 在另一示例性实施例中，通信接收机选择相应的干扰消除滤波器组，以在存在特定的时变干扰和/或失真条件的情况下，补偿所发射的通信信号上的干扰和/或失真。

    Synchronization of distributed cable modem network components
    117.
    发明授权
    Synchronization of distributed cable modem network components 有权
    分布式电缆调制解调器网络组件的同步

    公开(公告)号：US07826491B2

    公开(公告)日：2010-11-02

    申请号：US11216549

    申请日：2005-08-31

    申请人： Bruce J. Currivan

    发明人： Bruce J. Currivan

    IPC分类号： H04J3/26 ,  H04J3/07

    CPC分类号： H04N21/4263 ,  H04J3/0632 ,  H04J3/0682 ,  H04L12/2801 ,  H04L2007/045 ,  H04N21/42676

    摘要： A distributed Cable Modem Termination System (CMTS) includes a head end, a downstream transmitter hub, and a plurality of cable modems that all establish frequency lock with a common frequency reference. The head end transmits a plurality of time stamps from the head end to the plurality of cable modems via a packet data network, the downstream transmitter hub, and cable modem network plant. Each of the plurality of cable modems performs smoothing operations on the plurality of time stamps to establish phase lock with the head end. The downstream transmitter and the plurality of cable modems perform ranging operations to establish phase lock among the plurality of cable modems. In an alternate operation, the frequency reference includes marker sequences that the devices of the distributed CMTS use to establish phase lock.

    摘要翻译： 分布式电缆调制解调器终端系统（CMTS）包括头端，下游发射器集线器和多个电缆调制解调器，所有电缆调制解调器都建立具有公共频率参考的频率锁定。 头端经由分组数据网络，下游发射机集线器和电缆调制解调器网络设备从头端向多个电缆调制解调器发送多个时间戳。 多个电缆调制解调器中的每一个在多个时间戳上执行平滑操作以建立与头端的锁相。 下行发射器和多个电缆调制解调器执行测距操作以在多个电缆调制解调器之间建立相位锁定。 在替代操作中，频率参考包括分布式CMTS的设备用于建立锁相的标记序列。

    Synchronization of distributed cable modem network components
    118.
    发明授权
    Synchronization of distributed cable modem network components 有权
    分布式电缆调制解调器网络组件的同步

    公开(公告)号：US07630357B2

    公开(公告)日：2009-12-08

    申请号：US11031568

    申请日：2005-01-06

    申请人： Bruce J. Currivan

    发明人： Bruce J. Currivan

    IPC分类号： H04J3/06

    CPC分类号： H04J3/0682

    摘要： A distributed CMTS includes a head end, a downstream transmitter hub, and an upstream receiver hub. The head end transmits data packets to the downstream transmitter via a coupling packet data network. Each data packet is marked with a “measured delay” Quality of Service (QOS) and includes a time stamp that is based upon a clock of the head end and a delay tag. The downstream transmitter hub receives the plurality of data, adjusts the time stamps based upon the delay tags, smoothes the time stamps of the plurality of data packets and, based upon the smoothed time stamps, synchronizes its clock with the clock of the head end. The downstream transmitter hub then synchronizes a clock of the upstream receiver hub with the clock of the downstream transmitter hub. The upstream receiver hub may synchronize its clock to the clock of the head end using this technique.

    摘要翻译： 分布式CMTS包括头端，下游发射器集线器和上游接收器集线器。 头端经由耦合分组数据网络向下游发射机发送数据分组。 每个数据包被标记为“测量延迟”服务质量（QOS），并且包括基于头端的时钟和延迟标签的时间戳。 下游发送器集线器接收多个数据，基于延迟标签来调整时间标记，平滑多个数据分组的时间戳，并且基于平滑的时间戳，将其时钟与头端的时钟同步。 下游发射器中心然后将上游接收器集线器的时钟与下游发射机集线器的时钟同步。 上行接收器集线器可以使用这种技术将其时钟与头端的时钟同步。

    Systems and methods to attenuate intermodulation interference
    119.
    发明授权
    Systems and methods to attenuate intermodulation interference 失效
    减少互调干扰的系统和方法

    公开(公告)号：US08457584B2

    公开(公告)日：2013-06-04

    申请号：US11218596

    申请日：2005-09-06

    申请人： Bruce J. Currivan

    发明人： Bruce J. Currivan

    IPC分类号： H04B1/10

    CPC分类号： H04N21/61 ,  H04B1/1018

    摘要： The present invention is directed to systems and method for attenuating intermodulation interference. In particular, methods and systems to attenuate intermodulation interference contained within an aggregate signal having a transmitted signal that was transmitted over a communications channel having channel effects that produce the intermodulation interference are provided. The communications channel may be a cable television distribution network and the signal may be a cable television signal. A method is provided to predict when intermodulation interference will be large, so that actions within a receiver can be taken to reduce the impact of the interference and improve overall receiver performance.

    摘要翻译： 本发明涉及用于衰减互调干扰的系统和方法。 特别地，提供了衰减包含在具有通过具有产生互调干扰的信道效应的通信信道的发送信号的聚合信号内的互调干扰的方法和系统。 通信信道可以是有线电视分配网络，并且该信号可以是有线电视信号。 提供了一种预测互调干扰何时较大的方法，从而可以采取接收机内的动作来减少干扰的影响并提高整体接收机性能。