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11 条记录 (耗时 0.023 秒)

    Selective network switching in a wireless broadcast network
    1.
    发明申请
    Selective network switching in a wireless broadcast network 有权
    无线广播网络中的选择性网络切换

    公开(公告)号：US20060227718A1

    公开(公告)日：2006-10-12

    申请号：US11343380

    申请日：2006-01-30

    申请人： Michael Wang ,  Ashok Mantravadi ,  Murali Chari

    发明人： Michael Wang ,  Ashok Mantravadi ,  Murali Chari

    IPC分类号： H04J1/16 ,  H04Q7/00

    CPC分类号： H04B1/3805 ,  H04H20/26 ,  H04H40/18

    摘要： The disclosure is directed to a mobile communication device that may receive wireless broadcast signals from a number of different base stations or transmitters. As the location of the device moves relative to the transmitters, one transmitter will likely be identified as the transmitter broadcast the strongest, or highest quality, signal. When that determination is made, the user of the mobile device is presented the opportunity to switch to receiving that transmitters signal. Based on the user's reply, the device may remain with the current transmitter, even though it does not have the strongest signal, or the device may be configured to acquire and start receiving the new transmitter's signal. The measuring of the quality of a transmitter's signal may be based on a composite score that combines a number of individual measurements made over a predetermined period of time.

    摘要翻译： 本公开针对可从多个不同基站或发射机接收无线广播信号的移动通信设备。 随着设备的位置相对于发射机移动，一个发射机可能被识别为发射机广播最强或最高质量的信号。 当进行该确定时，向移动设备的用户呈现切换到接收该发射机信号的机会。 基于用户的答复，即使设备没有最强的信号，设备仍然可以保持当前的发射机，或者设备可能被配置为获取和开始接收新的发射机的信号。 发射机信号的质量的测量可以基于组合在预定时间段内进行的多个单独测量的综合得分。

    Method and system for re-acquiring signals of a wireless broadcast network
    3.
    发明申请
    Method and system for re-acquiring signals of a wireless broadcast network 有权
    用于重新获取无线广播网络信号的方法和系统

    公开(公告)号：US20060252420A1

    公开(公告)日：2006-11-09

    申请号：US11398202

    申请日：2006-04-04

    申请人： Ashok Mantravadi ,  Dhinakar Radhakrishnan ,  Murali Chari

    发明人： Ashok Mantravadi ,  Dhinakar Radhakrishnan ,  Murali Chari

    IPC分类号： H04Q7/20

    CPC分类号： H04H20/12 ,  H04H20/71 ,  H04H40/18 ,  H04W4/06

    摘要： The disclosure is directed to a mobile communication device that determines when a performance disruption indicates a loss of synchronization with a broadcast signal and, in response, initiates reacquisition of the signal. Reacquisition techniques may include identifying and decoding only select portions of header information in the broadcast signal. Reacquisition may also be initiated in response to one or more deterministic triggers and during a test mode of operation.

    摘要翻译： 本公开涉及一种移动通信设备，其确定性能中断何时表示与广播信号的同步丢失，并且响应地启动信号的重新获取。 重新获取技术可以包括仅在广播信号中识别和解码标题信息的选择部分。 还可以响应于一个或多个确定性触发而在测试操作模式期间启动重新获取。

    Forward error correction in a distribution system
    7.
    发明申请
    Forward error correction in a distribution system 失效
    配电系统中的前向纠错

    公开(公告)号：US20070230627A1

    公开(公告)日：2007-10-04

    申请号：US11398204

    申请日：2006-04-04

    申请人： Durk van Veen ,  Jai Subrahmanyam ,  Jinxia Bai ,  Murali Chari

    发明人： Durk van Veen ,  Jai Subrahmanyam ,  Jinxia Bai ,  Murali Chari

    IPC分类号： H04L27/06

    CPC分类号： H04L1/0061 ,  H04L1/0082 ,  H04L2001/0097

    摘要： A multimedia distribution system is disclosed. The distribution system includes a transmitter unit that distributes content from a content provider to one or more wireless subscriber units. The transmitter unit includes a decoder configured to determine whether a plurality of incoming packets include one or more erasures, a transmitter configured to transmit the packets to a receiving unit, and an error detection code generator configured to generate an error detection code for each of the packets transmitted to the receiver unit, the error detection code being modified for each of the erased packets so that the receiver unit will be able to identify the erased packets.

    摘要翻译： 公开了一种多媒体分发系统。 分配系统包括将内容从内容提供商分发到一个或多个无线用户单元的发射机单元。 发射机单元包括解码器，其被配置为确定多个输入分组是否包括一个或多个擦除，被配置为将分组发送到接收单元的发射机，以及错误检测码发生器，被配置为生成每个 发送到接收机单元的分组，针对每个被擦除的分组修改错误检测码，使得接收机单元将能够识别被擦除的分组。

    Evaluation of transmitter performance
    10.
    发明申请
    Evaluation of transmitter performance 失效
    发射机性能评估

    公开(公告)号：US20070071122A1

    公开(公告)日：2007-03-29

    申请号：US11361085

    申请日：2006-02-22

    申请人： Fuyun Ling ,  Durk Van Veen ,  Murali Chari ,  Thomas Sun

    发明人： Fuyun Ling ,  Durk Van Veen ,  Murali Chari ,  Thomas Sun

    IPC分类号： H04K1/10

    CPC分类号： H04L5/023 ,  H04B17/13 ,  H04B17/391 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/0232 ,  H04L27/0012

    摘要： Systems and methodologies are described that facilitate monitoring transmitter performance in a wireless communication environment. A signal analyzer can be used to sample the output of a transmitter and the sampled signal can be propagated to a processor. The processor can generate frequency domain channel estimates for the subcarriers. If the transmitted modulation symbols are unknown, the processor can determine the modulation symbols and use the determined modulation symbols to calculate the channel estimates. The channel estimates can be averaged and used to generate various metrics to evaluate the transmitter performance.

    摘要翻译： 描述了便于在无线通信环境中监视发射机性能的系统和方法。 信号分析仪可用于对发射机的输出采样，采样信号可以传播到处理器。 处理器可以产生子载波的频域信道估计。 如果发送的调制符号是未知的，则处理器可以确定调制符号并使用确定的调制符号来计算信道估计。 信道估计可以被平均化并用于生成各种度量以评估发射机的性能。