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    • 103. 发明申请
    • DUAL-STAGE ECHO CANCELLATION IN A WIRELESS REPEATER USING AN INSERTED PILOT
    • 使用插入式引导器在无线中继器中进行双级ECHO取消
    • US20100285734A1
    • 2010-11-11
    • US12609698
    • 2009-10-30
    • Peter John BlackDhananjay Ashok GoreGwendolyn Denise Barriac
    • Peter John BlackDhananjay Ashok GoreGwendolyn Denise Barriac
    • H04B7/14H04B15/00
    • H04B7/15535H04B7/15585H04L27/2607H04L27/2613
    • In one embodiment, a method for providing echo cancellation in a wireless repeater includes: adding the pilot signal to a transmit signal; receiving a receive signal being the sum of a remote signal, a feedback pilot signal and a feedback transmit signal; cancelling the feedback transmit signal from the receive signal using a currently available feedback channel estimate and generating a first echo cancelled signal; generating an updated feedback channel estimate using the first echo cancelled signal and the pilot signal as a reference signal; cancelling the feedback transmit signal and the feedback pilot signal from the receive signal using the updated feedback channel estimate and generating a second echo cancelled signal; and amplifying the second echo cancelled signal as the transmit signal. In another embodiment, the feedback pilot signal is cancelled from the first echo cancelled signal using the updated feedback channel estimate to generate the second echo cancelled signal.
    • 在一个实施例中,一种用于在无线中继器中提供回波消除的方法包括:将导频信号添加到发射信号; 接收作为远程信号,反馈导频信号和反馈发送信号之和的接收信号; 使用当前可用的反馈信道估计从所述接收信号中消除所述反馈发射信号并产生第一回波消除信号; 使用所述第一回波消除信号和所述导频信号作为参考信号产生更新的反馈信道估计; 使用更新的反馈信道估计从接收信号中消除反馈发射信号和反馈导频信号,并产生第二回波消除信号; 并且将第二回波消除信号放大为发送信号。 在另一个实施例中,使用更新的反馈信道估计从第一回波消除信号中消除反馈导频信号以产生第二回波消除信号。
    • 105. 发明申请
    • Methods and Apparatus for Reverse Link Timing Correction
    • 反向链路时序校正的方法和装置
    • US20100074219A1
    • 2010-03-25
    • US12234990
    • 2008-09-22
    • Edward Harrison TeagueDhananjay Ashok Gore
    • Edward Harrison TeagueDhananjay Ashok Gore
    • H04Q7/00
    • H04W56/004H04W36/00
    • Methods and apparatus for reverse link timing correction in a wireless communication device. In particular, when a handoff of the device from a first sector currently serving the device to a second sector not currently serving the device is detected, a first function linking timing correction of a reverse link of the device to forward link timing corrections is changed to a second function for timing correction. In particular, the second function is configured to correct reverse link timing during a time period of either during or for a predetermined period after a handoff of the device from the first sector to the second sector, where the second function is based on a criterion different from criteria of the first function.
    • 无线通信设备中反向链路定时校正的方法和装置。 特别地,当检测到设备从当前正在服务于设备的第一扇区到当前不在该设备服务的第二扇区的切换时,将设备的反向链路的定时校正链接到转发链路定时校正的第一功能改变为 用于定时校正的第二功能。 特别地,第二功能被配置为在设备从第一扇区切换到第二扇区之后的预定时段期间或在预定时段期间的时间段期间校正反向链路定时,其中第二功能基于不同的标准 从第一个功能的标准。
    • 110. 发明授权
    • Echo cancellation repeater using an inserted pilot with gain-based power level control scheme
    • 使用带有增益的功率电平控制方案的插入导频的回波消除中继器
    • US08687540B2
    • 2014-04-01
    • US13155275
    • 2011-06-07
    • Michael Mao WangGwendolyn Denise BarriacDhananjay Ashok GoreTao Tian
    • Michael Mao WangGwendolyn Denise BarriacDhananjay Ashok GoreTao Tian
    • H04B7/14H04B3/36H04B7/17H04B17/02
    • H04B7/15585
    • A device for generating a pilot signal for use in a wireless repeater where the pilot signal is added to a transmit signal for transmission includes a pilot power control unit configured to set a power level of the pilot signal as a function of a gain of the repeater and a power level of the transmit signal, where the function comprises a linear or non-linear function. In one embodiment, the operation of the repeater may be divided into gain regions and the inserted pilot power is controlled according to the different gain regions of the repeater. When the repeater gain is low, the pilot power may be set greater than the transmit power to ensure there is sufficient signal to use for channel estimation. When the repeater gain is in steady state, the pilot power may be set to be lower than the transmit power to avoid interference.
    • 一种用于生成用于无线中继器的导频信号的装置,其中导频信号被添加到用于传输的发射信号中的导频功率控制单元被配置为将导频信号的功率电平设置为中继器的增益的函数 以及发射信号的功率电平,其中该功能包括线性或非线性函数。 在一个实施例中,中继器的操作可以被划分为增益区域,并且插入的导频功率根据中继器的不同的增益区域被控制。 当中继器增益低时,导频功率可以被设置为大于发射功率,以确保有足够的信号用于信道估计。 当中继器增益处于稳定状态时,可以将导频功率设置为低于发射功率以避免干扰。