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118 条记录 (耗时 0.031 秒)

    Power savings in hierarchically coded modulation
    72.
    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
    75.
    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
    76.
    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.

    Systems and methods for generalized slot-to-interlace mapping
    78.
    发明授权
    Systems and methods for generalized slot-to-interlace mapping 有权
    用于广义时隙到交错映射的系统和方法

    公开(公告)号：US08477809B2

    公开(公告)日：2013-07-02

    申请号：US11834671

    申请日：2007-08-06

    申请人： Krishna Kiran Mukkavilli ,  Raghuraman Krishnamoorthi ,  Rajiv Vijayan

    发明人： Krishna Kiran Mukkavilli ,  Raghuraman Krishnamoorthi ,  Rajiv Vijayan

    IPC分类号： H04J3/06 ,  H04J9/00 ,  H04W4/00 ,  H04L27/28

    CPC分类号： H04L5/0048 ,  H04L5/0007 ,  H04L5/0044 ,  H04L25/0224

    摘要： A transmitter or receiver device includes a processing system configured to have one or more pilot interlace vectors and one or more distance vectors. The processing system is further configured to generate a first slot interlace for a first slot based on the one or more pilot interlace vectors, and is further configured to generate a second slot interlace for a second slot based on the first slot interlace and the one or more distance vectors. Additional slot interlaces for all other slots may also be generated based on the first slot interlace and the one or more distance vectors.

    摘要翻译： 发射机或接收机设备包括被配置为具有一个或多个导频交织向量和一个或多个距离向量的处理系统。 所述处理系统还被配置为基于所述一个或多个导频交错向量来生成用于第一时隙的第一时隙交织，并且还被配置为基于所述第一时隙交织和所述第一时隙交织而生成用于第二时隙的第二时隙交织， 更多距离矢量。 也可以基于第一时隙交错和一个或多个距离矢量来生成用于所有其他时隙的附加时隙交织。

    Method and apparatus for decoding data in a layered modulation system
    79.
    发明授权
    Method and apparatus for decoding data in a layered modulation system 有权
    用于在分层调制系统中解码数据的方法和装置

    公开(公告)号：US08223853B2

    公开(公告)日：2012-07-17

    申请号：US11329891

    申请日：2006-01-10

    申请人： Rajiv Vijayan ,  Seong Taek Chung ,  Thomas Sun

    发明人： Rajiv Vijayan ,  Seong Taek Chung ,  Thomas Sun

    IPC分类号： H04K1/10

    CPC分类号： H04L27/3488 ,  H04L1/0045 ,  H04L1/005 ,  H04L1/0065 ,  H04L1/0066 ,  H04L1/007 ,  H04L27/2608 ,  H04L27/2626 ,  H04L27/2647 ,  H04L27/2649 ,  H04L2001/0098

    摘要： A decoder for a layered modulation system can be configured to independently and concurrently decode each of a base and enhancement layer. The base layer decoder and enhancement layer decoder can be configured substantially in parallel and can each operate concurrently on the same received layered modulation symbol. Each of the base and enhancement layer decoders can be configured with a bit metric module that is configured to determine a signal quality metric based on the received symbol. In systems having turbo encoded data, the bit metric module can be configured to determine a log likelihood ratio. The ratio is based in part on a channel estimate and an energy ratio used in the layered modulation constellation.

    摘要翻译： 用于分层调制系统的解码器可以被配置为独立地并且解码每个基本和增强层。 基本层解码器和增强层解码器可以基本并行配置，并且可以在相同的接收分层调制符号上同时操作。 基本和增强层解码器中的每一个可以配置有位度量模块，其被配置为基于接收到的符号来确定信号质量度量。 在具有turbo编码数据的系统中，比特量度模块可被配置为确定对数似然比。 该比率部分地基于在分层调制星座中使用的信道估计和能量比。