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    METHODS AND APPARATUS FOR REDUCTION OF A PEAK TO AVERAGE RATIO FOR AN OFDM TRANSMIT SIGNAL
    95.
    发明申请
    METHODS AND APPARATUS FOR REDUCTION OF A PEAK TO AVERAGE RATIO FOR AN OFDM TRANSMIT SIGNAL 审中-公开
    用于减少OFDM传输信号的平均比的峰值的方法和装置

    公开(公告)号：US20110255622A1

    公开(公告)日：2011-10-20

    申请号：US13168849

    申请日：2011-06-24

    申请人： Durk L. van Veen ,  Fuyun Ling ,  Raghuraman Krishnamoorthi

    发明人： Durk L. van Veen ,  Fuyun Ling ,  Raghuraman Krishnamoorthi

    IPC分类号： H04J11/00

    CPC分类号： H04L27/2614 ,  H04L27/2615

    摘要： Methods and apparatus for reduction of a peak to average ratio for an OFDM transmit signal. In an aspect, a method is provided for reducing a peak to average ratio of a transmit waveform. The method includes obtaining a primary scrambler sequence, generating a secondary scrambler sequence having a length characteristic based on data to be scrambled, and combining the primary and secondary scrambler sequences to produce a PAR reduction sequence. In another aspect, an apparatus is provided for reducing a peak to average ratio of a transmit waveform. The apparatus includes a secondary generator configured to generate a secondary scrambler sequence having a length characteristic based on data to be scrambled, and combining logic configured to combine a primary scrambler sequence and the secondary scrambler sequences to produce a PAR reduction sequence.

    摘要翻译： 降低OFDM发射信号的峰均比的方法和装置。 在一方面，提供了一种降低发射波形的峰均比的方法。 该方法包括：获得主加扰器序列，产生具有基于要加扰的数据的长度特性的次扰频序列，以及组合所述主加扰序列和次加扰序列以产生PAR减少序列。 在另一方面，提供一种用于减小发射波形的峰均比的装置。 该装置包括辅助发生器，其被配置为产生具有基于要加扰的数据的长度特性的二次扰频器序列，以及被配置为组合主加扰器序列和次加扰器序列以产生PAR减少序列的组合逻辑。

    COHERENT INITIAL ACQUISITION
    98.
    发明申请
    COHERENT INITIAL ACQUISITION 有权
    相关的初步收购

    公开(公告)号：US20080220723A1

    公开(公告)日：2008-09-11

    申请号：US11860505

    申请日：2007-09-24

    申请人： Raghuraman Krishnamoorthi ,  Tao Tian ,  Fuyun Ling ,  Yuheng Huang

    发明人： Raghuraman Krishnamoorthi ,  Tao Tian ,  Fuyun Ling ,  Yuheng Huang

    IPC分类号： H04B7/00

    CPC分类号： H04L27/2675 ,  H04L5/0007 ,  H04L5/0048 ,  H04L27/261 ,  H04L27/2655

    摘要： An acquisition module includes a coherent correlator configured to receive a transmission having a pilot signal and correlate the received transmission with a local copy of the pilot signal to produce a first output, a delayed correlator configured to delay the first output and correlate the first output with the delayed first output to produce a second output, and a detector configured to detect the pilot signal in the transmission based on the second output.

    摘要翻译： 获取模块包括相干相关器，其被配置为接收具有导频信号的传输并将接收到的传输与导频信号的本地副本相关联以产生第一输出，延迟相关器被配置为延迟第一输出并将第一输出与 延迟的第一输出以产生第二输出;以及检测器，被配置为基于所述第二输出来检测所述传输中的导频信号。

    Fine timing acquisition
    99.
    发明申请
    Fine timing acquisition 审中-公开
    精细定时采集

    公开(公告)号：US20060221810A1

    公开(公告)日：2006-10-05

    申请号：US11372394

    申请日：2006-03-08

    申请人： Bojan Vrcelj ,  Fuyun Ling ,  Raghuraman Krishnamoorthi ,  Vinay Murthy

    发明人： Bojan Vrcelj ,  Fuyun Ling ,  Raghuraman Krishnamoorthi ,  Vinay Murthy

    IPC分类号： H04J11/00 ,  H04J3/06

    CPC分类号： H04L27/2656 ,  H04L27/2663 ,  H04L27/2665 ,  H04L27/2675 ,  H04L27/2695

    摘要： A method for synchronizing timing of a receiver to a received orthogonal frequency division multiplexing (OFDM) signal is disclosed. A first timing acquisition is performed with a first received time division multiplexed (TDM) pilot to determine a course timing estimate of the received OFDM signal. A second timing acquisition is performed with a second TDM pilot to determine a fine timing estimate for a OFDM symbol of the received OFDM signal. In the second timing acquisition, the accumulated energy of channel taps over a detection window is determined and a trailing edge of the accumulated energy curve is detected. A Fourier transform (FT) collection window location for subsequent OFDM symbols is adjusted according to the trailing edge information.

    摘要翻译： 公开了一种用于使接收机的定时与接收的正交频分复用（OFDM）信号同步的方法。 利用第一接收时分复用（TDM）导频执行第一定时获取，以确定所接收的OFDM信号的路线定时估计。 用第二TDM导频执行第二定时获取，以确定接收到的OFDM信号的OFDM符号的精确定时估计。 在第二定时获取中，确定在检测窗口上的通道抽头的累积能量，并且检测累积能量曲线的后沿。 根据后沿信息调整后续OFDM符号的傅立叶变换（FT）收集窗口位置。

    Method and system for automatic gain control during signal acquisition
    100.
    发明授权
    Method and system for automatic gain control during signal acquisition 失效
    信号采集过程中自动增益控制的方法和系统

    公开(公告)号：US07702046B2

    公开(公告)日：2010-04-20

    申请号：US11397256

    申请日：2006-04-03

    申请人： Vinay Murthy ,  Linbo Li ,  Raghuraman Krishnamoorthi

    发明人： Vinay Murthy ,  Linbo Li ,  Raghuraman Krishnamoorthi

    IPC分类号： H04L27/08

    CPC分类号： H03G3/3052

    摘要： The disclosure is directed to a mobile communication device that includes automatic gain control (AGC) circuitry and operates in either a tracking mode or an acquisition mode. A received signal is sampled n times to calculate an energy estimate that is used to set the gain control values within the AGC circuitry. The value of n varies depending on whether the handset is operating in the acquisition mode or the tracking mode. Acquisition mode is typically considered to be the mode prior to coarse timing acquisition, also referred to as frame acquisition.

    摘要翻译： 本公开涉及包括自动增益控制（AGC）电路并且以跟踪模式或采集模式操作的移动通信设备。 接收到的信号被采样n次以计算用于设置AGC电路内的增益控制值的能量估计。 n的值根据手机在采集模式或跟踪模式下的运行而变化。 采集模式通常被认为是粗略定时采集之前的模式，也称为帧采集。