利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

118 条记录 (耗时 0.04 秒)

    PEAK-TO-AVERAGE POWER RATIO MANAGEMENT FOR MULTI-CARRIER MODULATION IN WIRELESS COMMUNICATION SYSTEMS
    42.
    发明申请
    PEAK-TO-AVERAGE POWER RATIO MANAGEMENT FOR MULTI-CARRIER MODULATION IN WIRELESS COMMUNICATION SYSTEMS 有权
    无线通信系统中多载波调制的平均功率比率管理

    公开(公告)号：US20090040975A1

    公开(公告)日：2009-02-12

    申请号：US12170560

    申请日：2008-07-10

    申请人： Rajiv Vijayan ,  Avneesh Agrawal ,  Sanjay Jha

    发明人： Rajiv Vijayan ,  Avneesh Agrawal ,  Sanjay Jha

    IPC分类号： H04W4/00

    CPC分类号： H04W72/0453 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0066 ,  H04L27/2614 ,  H04W52/343 ,  H04W52/367

    摘要： Techniques for managing peak-to-average power ratio (PAPR) for multi-carrier modulation in wireless communication systems. Different terminals in a multiple-access system may have different required transmit powers. The number of carriers to allocate to each terminal is made dependent on its required transmit power. Terminals with higher required transmit powers may be allocated fewer carriers (associated with smaller PAPR) to allow the power amplifier to operate at higher power levels. Terminals with lower required transmit powers may be allocated more carriers (associated with higher PAPR) since the power amplifier is operated at lower power levels. The specific carriers to assign to the terminals may also be determined by their transmit power levels to reduce out-of-band emissions. Terminals with higher required transmit powers may be assigned with carriers near the middle of the operating band, and terminals with lower required transmit powers may be assigned with carriers near the band edges.

    摘要翻译： 用于管理无线通信系统中多载波调制的峰均功率比（PAPR）的技术。 多址系统中的不同终端可能具有不同的所需传输功率。 分配给每个终端的载波数量取决于其所需的发射功率。 具有更高所需发射功率的终端可以被分配较少的载波（与较小的PAPR相关联），以允许功率放大器在较高的功率电平下工作。 由于功率放大器在较低的功率电平下工作，所以具有较低所需发射功率的终端可以分配更多的载波（与更高的PAPR相关联）。 分配给终端的特定载波也可以由其发射功率电平来确定，以减少带外发射。 具有更高要求的发射功率的终端可以被分配到靠近工作频带中间的载波，并且具有较低所需发射功率的终端可以被分配给带边缘附近的载波。

    Apparatus and method for determining sleep clock timing
    43.
    发明授权
    Apparatus and method for determining sleep clock timing 失效
    用于确定睡眠时钟定时的装置和方法

    公开(公告)号：US07463910B2

    公开(公告)日：2008-12-09

    申请号：US11271409

    申请日：2005-11-09

    申请人： Michael Mao Wang ,  Fuyun Ling ,  Rajiv Vijayan

    发明人： Michael Mao Wang ,  Fuyun Ling ,  Rajiv Vijayan

    IPC分类号： H04M1/00 ,  H04B1/16

    CPC分类号： H04W52/029 ,  Y02D70/00

    摘要： Apparatus and methods for estimating the frequency of a sleep or slow clock by selectively utilizing an estimated sleep clock frequency and an estimated change in the sleep clock frequency. The disclosed apparatus includes a sleep clock frequency estimator to output a fast clock derived sleep clock frequency estimate and a sleep clock change frequency estimator to output an estimate of a change in frequency of the sleep clock. The apparatus further includes a combiner that weights at least one of the fast clock derived sleep clock frequency estimate to obtain a weighted sleep clock frequency estimate and the estimate of the change in frequency of the sleep clock to obtain a weighted estimate of the change in frequency of the sleep clock. The combiner also determines a new estimate of the sleep clock frequency using at least one of the weighted sleep clock frequency estimate and the weighted estimate of the change in frequency of the sleep clock. Complementary methods are also disclosed.

    摘要翻译： 通过选择性地利用估计的睡眠时钟频率和睡眠时钟频率的估计改变来估计睡眠或慢时钟的频率的装置和方法。 所公开的装置包括：睡眠时钟频率估计器，用于输出快速时钟导出的睡眠时钟频率估计;以及睡眠时钟变化频率估计器，用于输出睡眠时钟的频率变化的估计。 该装置还包括组合器，其对至少一个快速时钟导出的睡眠时钟频率估计进行加权以获得加权睡眠时钟频率估计和睡眠时钟的频率变化的估计，以获得频率变化的加权估计 的睡眠时钟。 组合器还使用加权睡眠时钟频率估计和睡眠时钟的频率变化的加权估计中的至少一个来确定睡眠时钟频率的新估计。 还公开了互补方法。

    Method and apparatus for seamlessly switching reception between multimedia streams in a wireless communication system
    44.
    发明授权
    Method and apparatus for seamlessly switching reception between multimedia streams in a wireless communication system 有权
    一种用于在无线通信系统中在多媒体流之间无缝切换接收的方法和装置

    公开(公告)号：US07366462B2

    公开(公告)日：2008-04-29

    申请号：US10968613

    申请日：2004-10-18

    申请人： Ramaswamy Murali ,  Gordon Kent Walker ,  Rajiv Vijayan

    发明人： Ramaswamy Murali ,  Gordon Kent Walker ,  Rajiv Vijayan

    IPC分类号： H04H7/00

    CPC分类号： H04N5/4401 ,  H04N5/50 ,  H04N21/41407 ,  H04N21/4345 ,  H04N21/4384 ,  H04N21/44222

    摘要： Techniques to seamlessly switch reception between multimedia programs are described. For “continued decoding”, a wireless device continues to receive, decode, decompress, and (optionally) display a current program, even after a new program has been selected, until overhead information needed to decode the new program is received. After receiving the overhead information, the wireless device decodes the new program but continues to decompress the current program. The wireless device decompresses the new program after decoding this program. For “early decoding”, the wireless device receives a user input and identifies a program with potential for user selection. The identified program may be the one highlighted by the user input or a program anticipated to be selected based on the user input. The wireless device initiates decoding of the identified program, prior to its selection, so that the program can be decompressed and displayed earlier if it is subsequently selected.

    摘要翻译： 描述了在多媒体节目之间无缝切换接收的技术。 对于“继续解码”，即使在选择了新的程序之后，无线设备继续接收，解码，解压缩和（可选地）显示当前程序，直到接收到解码新程序所需的开销信息。 在接收到开销信息之后，无线设备解码新程序，但是继续解压缩当前程序。 解码该程序后，无线设备解压缩新程序。 对于“早期解码”，无线设备接收用户输入并识别具有用户选择潜力的节目。 识别的程序可以是由用户输入或预期将基于用户输入选择的程序突出显示的程序。 无线设备在其选择之前启动所识别的节目的解码，使得如果随后选择该节目，则可以更早地解压缩并显示节目。

    Power savings in hierarchically coded modulation
    47.
    发明申请
    Power savings in hierarchically coded modulation 有权
    省电分层编码调制

    公开(公告)号：US20060232447A1

    公开(公告)日：2006-10-19

    申请号：US11096320

    申请日：2005-03-31

    申请人： Gordon Walker ,  Rajiv Vijayan

    发明人： Gordon Walker ,  Rajiv Vijayan

    IPC分类号： H03M7/00

    CPC分类号： H04L27/3488 ,  H04W52/0245 ,  Y02D70/00

    摘要： A wireless communication apparatus in a hierarchically coded modulation system can use error control mechanisms generated during decoding of base layer information to predict a probability of successful demodulation of enhancement layer information. Performance in the demodulation of the base layer correlates to performance in the demodulation of the enhancement layer. The receiver can determine whether to attempt demodulation of temporally correlated enhancement layer data based in part on the predicted probability of success. If the receiver determines not to demodulate the enhancement layer, the receiver can power down the enhancement layer demodulator, or otherwise minimize the power expended in the enhancement layer demodulator.

    摘要翻译： 分级编码调制系统中的无线通信装置可以使用在解码基层信息期间产生的误差控制机制来预测增强层信息的成功解调的概率。 基层解调性能与增强层解调性能有关。 接收机可以部分地基于预测的成功概率来确定是否尝试对时间相关的增强层数据的解调。 如果接收机确定不解调增强层，则接收机可以将增强层解调器断电，或以其他方式最小化增强层解调器中消耗的功率。

    Accumulated phase measurement using open-loop phase estimation
    49.
    发明授权
    Accumulated phase measurement using open-loop phase estimation 有权
    使用开环相位估计的累积相位测量

    公开(公告)号：US06282500B1

    公开(公告)日：2001-08-28

    申请号：US09149467

    申请日：1998-09-09

    申请人： Avneesh Agrawal ,  Rajiv Vijayan ,  Nadav Levanon

    发明人： Avneesh Agrawal ,  Rajiv Vijayan ,  Nadav Levanon

    IPC分类号： H04B110

    CPC分类号： G01S1/045 ,  G01R29/0892 ,  H03J7/04 ,  H04L27/0014 ,  H04L2027/0067

    摘要： An apparatus and method for generating an accumulated phase measurement of a communications signal over a predetermined time interval. A frequency estimate of the signal is generated; the frequency estimate is then converted to a coarse phase measurement. A phase error is generated based on the frequency estimate; the phase error is then converted to a fine phase measurement. The coarse and fine phase measurements are summed to yield an accumulated phase measurement.

    摘要翻译： 一种用于在预定时间间隔内产生通信信号的累积相位测量的装置和方法。 产生信号的频率估计; 然后将频率估计值转换为粗略相位测量。 基于频率估计产生相位误差; 然后将相位误差转换为精细相位测量。 粗和细相位测量相加以产生累积相位测量。

    Carrier assignment for multi-carrier modulation in wireless communication
    50.
    发明授权
    Carrier assignment for multi-carrier modulation in wireless communication 有权

    公开(公告)号：US10064179B2

    公开(公告)日：2018-08-28

    申请号：US12622202

    申请日：2009-11-19

    申请人： Rajiv Vijayan ,  Avneesh Agrawal ,  Sanjay Jha

    发明人： Rajiv Vijayan ,  Avneesh Agrawal ,  Sanjay Jha

    IPC分类号： H04L27/26 ,  H04W72/04 ,  H04L5/00 ,  H04W52/34 ,  H04W52/36

    CPC分类号： H04W72/0453 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0066 ,  H04L27/2614 ,  H04W52/343 ,  H04W52/367

    摘要： Techniques for managing peak-to-average power ratio (PAPR) for multi-carrier modulation in wireless communication systems. Different terminals in a multiple-access system may have different required transmit powers. The number of carriers to allocate to each terminal is made dependent on its required transmit power. Terminals with higher required transmit powers may be allocated fewer carriers (associated with smaller PAPR) to allow the power amplifier to operate at higher power levels. Terminals with lower required transmit powers may be allocated more carriers (associated with higher PAPR) since the power amplifier is operated at lower power levels. The specific carriers to assign to the terminals may also be determined by their transmit power levels to reduce out-of-band emissions. Terminals with higher required transmit powers may be assigned with carriers near the middle of the operating band, and terminals with lower required transmit powers may be assigned with carriers near the band edges.