Selectable PA bias temperature compensation circuitry
    8.
    发明授权
    Selectable PA bias temperature compensation circuitry 有权
    可选PA偏置温度补偿电路

    公开(公告)号:US08983407B2

    公开(公告)日:2015-03-17

    申请号:US13288318

    申请日:2011-11-03

    摘要: Radio frequency (RF) power amplifier (PA) circuitry, which transmits RF signals is disclosed. The RF PA circuitry includes a final stage, a final stage current digital-to-analog converter (IDAC), and a final stage temperature compensation circuit. A final stage current reference circuit may provide an uncompensated final stage reference current to the final stage temperature compensation circuit, which receives and temperature compensates the uncompensated final stage reference current to provide a final stage reference current. The final stage IDAC uses the final stage reference current in a digital-to-analog conversion to provide a final stage bias signal to bias the final stage. The temperature compensation provided by the final stage temperature compensation circuit is selectable.

    摘要翻译: 公开了发射RF信号的射频(RF)功率放大器(PA)电路。 RF PA电路包括最后级,最后一级电流数模转换器(IDAC)和最终级温度补偿电路。 最终级电流参考电路可以向最终级温度补偿电路提供未补偿的最终级参考电流,其接收和温度补偿未补偿的最终级参考电流以提供最终级参考电流。 最终阶段IDAC在数模转换中使用最后阶段参考电流,以提供最终阶段偏置信号来偏向最后阶段。 由最终级温度补偿电路提供的温度补偿是可选择的。

    Efficient broadcasting via random linear packet combining
    9.
    发明授权
    Efficient broadcasting via random linear packet combining 有权
    通过随机线性分组组合进行有效的广播

    公开(公告)号:US08953612B2

    公开(公告)日:2015-02-10

    申请号:US13414235

    申请日:2012-03-07

    IPC分类号: H04L12/28 H04L1/00 H04H20/42

    摘要: Embodiments of systems and methods for efficient broadcasting via random linear packet combining are described. A plurality of data packets are received from a data source according to embodiments. The plurality of data packets is divided into a plurality of data blocks, and bits associated with the plurality of data blocks are multiplied by a set of coefficients to generate a plurality of product values. An encoded data packet having a plurality of encoded data blocks may also be generated by linearly combining the plurality of product values for respective data blocks of each of the plurality of data packets into corresponding encoded data blocks of the encoded data packet. Because each encoded data packet includes information about a complete set of data packets, rather than just a subset, less broadcast redundancy may be required.

    摘要翻译: 描述了通过随机线性分组组合进行有效广播的系统和方法的实施例。 根据实施例,从数据源接收多个数据分组。 多个数据分组被分成多个数据块,并且与多个数据块相关联的比特乘以一系列系数以产生多个乘积值。 也可以通过将多个数据分组中的每一个的各个数据块的多个乘积值线性地组合成编码数据分组的相应的编码数据块来生成具有多个编码数据块的编码数据分组。 因为每个编码的数据分组包括关于完整的一组数据分组的信息,而不仅仅是一个子集,所以可能需要较少的广播冗余。

    System and method of delivering video content
    10.
    发明授权
    System and method of delivering video content 有权
    提供视频内容的系统和方法

    公开(公告)号:US08887216B2

    公开(公告)日:2014-11-11

    申请号:US13609579

    申请日:2012-09-11

    摘要: A method includes receiving data from a set-top box device at an access system via an access network, the data indicating a selection of a channel at the set-top box device, the data including a multicast group address. The method also includes sending copies of video data packets of the channel from the access system for storage in a first-in first-out cache associated with the channel. The method further includes automatically connecting the set-top box device to a multicast stream of the selected channel after a particular number of video data packets are sent to the set-top box device from the cache. The particular number of video data packets corresponds to a time period between communicating successive random access point packets of the channel and is less than a capacity of the cache.

    摘要翻译: 一种方法包括经由接入网从接入系统的机顶盒设备接收数据,所述数据指示机顶盒设备上的信道的选择,所述数据包括多播组地址。 该方法还包括从接入系统发送该信道的视频数据分组的副本以存储在与该信道相关联的先进先出高速缓存中。 该方法还包括在将特定数量的视频数据分组从高速缓存发送到机顶盒设备之后,将机顶盒设备自动连接到所选频道的多播流。 视频数据包的特定数量对应于通道的连续的随机接入点包之间的时间段,并且小于高速缓存的容量。