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    Wideband echo cancellation in a repeater
    1.
    发明授权
    Wideband echo cancellation in a repeater 失效
    中继器中的宽带回波消除

    公开(公告)号：US08285201B2

    公开(公告)日：2012-10-09

    申请号：US12609505

    申请日：2009-10-30

    申请人： Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  James Arthur Proctor, Jr. ,  Steven J. Howard ,  Hakan Inanoglu ,  Kenneth M. Gainey ,  Michael Mao Wang ,  Tao Tian

    发明人： Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  James Arthur Proctor, Jr. ,  Steven J. Howard ,  Hakan Inanoglu ,  Kenneth M. Gainey ,  Michael Mao Wang ,  Tao Tian

    IPC分类号： H04Q7/32

    CPC分类号： H04B7/15535 ,  H04B7/15585 ,  H04L27/2607 ,  H04L27/2613

    摘要： A wireless repeater having a receiving antenna for receiving an input signal and a transmitting antenna for transmitting an amplified signal includes first and second front-end circuits and a repeater baseband block coupled between the first and second front-end circuits. The repeater baseband block includes a channel estimation block, an echo canceller implementing time domain echo cancellation, a variable gain stage controlled by a gain control block implementing digital gain control, a first variable delay element introducing a first delay before or after the echo canceller, a second variable delay element introducing a second delay to the output signal. The delayed output signal is coupled to the channel estimation block as a reference signal for estimating the feedback channel, to the echo canceller as a reference signal for estimating the feedback signal, and to the gain control block for monitoring the stability of the repeater.

    摘要翻译： 具有用于接收输入信号的接收天线和用于发送放大信号的发射天线的无线中继器包括耦合在第一和第二前端电路之间的第一和第二前端电路和中继器基带块。 中继器基带块包括信道估计块，实现时域回声消除的回波消除器，实现数字增益控制的增益控制块控制的可变增益级，在回波消除器之前或之后引入第一延迟的第一可变延迟元件， 向输出信号引入第二延迟的第二可变延迟元件。 延迟输出信号作为用于估计反馈信道的参考信号，作为用于估计反馈信号的参考信号的回波消除器和用于监视中继器的稳定性的增益控制块耦合到信道估计块。

    DELAY CONTROL TO IMPROVE FREQUENCY DOMAIN CHANNEL ESTIMATION IN AN ECHO CANCELLATION REPEATER
    3.
    发明申请
    DELAY CONTROL TO IMPROVE FREQUENCY DOMAIN CHANNEL ESTIMATION IN AN ECHO CANCELLATION REPEATER 有权
    延迟控制以提高ECHO CANCELLATION REPEATER中的频域信道估计

    公开(公告)号：US20100285735A1

    公开(公告)日：2010-11-11

    申请号：US12609796

    申请日：2009-10-30

    申请人： Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  James Arthur Proctor, JR. ,  Kenneth M. Gainey

    发明人： Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  James Arthur Proctor, JR. ,  Kenneth M. Gainey

    IPC分类号： H04B7/14

    CPC分类号： H04B7/15535 ,  H04B7/15585 ,  H04L27/2607 ,  H04L27/2613

    摘要： A wireless repeater has a receiving antenna for receiving an input signal and a transmitting antenna for transmitting an amplified signal where the input signal is a sum of a remote signal and a feedback signal. The repeater includes an echo canceller receiving the input signal and generating an echo cancelled signal by estimating a feedback channel between the transmitting antenna and the receiving antenna and cancelling a feedback signal estimate from the input signal, an amplifier for amplifying the echo cancelled signal and providing the amplified signal to the transmitting antenna, and a variable delay element receiving the echo cancelled signal and introducing a first delay to the echo cancelled signal. The first delay is selected to optimize the estimation of the feedback channel, thereby optimizing the cancellation of the feedback signal. The delayed echo cancelled signal is coupled to the echo canceller as a reference signal for estimating the feedback channel.

    摘要翻译： 无线中继器具有用于接收输入信号的接收天线和用于发送放大信号的发送天线，其中输入信号是远程信号和反馈信号之和。 中继器包括回波消除器，其接收输入信号并通过估计发射天线和接收天线之间的反馈信道并从输入信号中消除反馈信号估计来产生回波消除信号，放大器用于放大回波消除信号并提供 向发射天线的放大信号，以及接收回声消除信号的可变延迟元件，并向回波消除信号引入第一延迟。 选择第一延迟以优化反馈信道的估计，从而优化反馈信号的消除。 延迟回波消除信号耦合到回波消除器作为用于估计反馈信道的参考信号。

    Delay control to improve frequency domain channel estimation in an echo cancellation repeater
    6.
    发明授权
    Delay control to improve frequency domain channel estimation in an echo cancellation repeater 有权
    延迟控制，以改善回波消除中继器中的频域信道估计

    公开(公告)号：US08385818B2

    公开(公告)日：2013-02-26

    申请号：US12609796

    申请日：2009-10-30

    申请人： Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  James Arthur Proctor, Jr. ,  Kenneth M. Gainey

    发明人： Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  James Arthur Proctor, Jr. ,  Kenneth M. Gainey

    IPC分类号： H04Q7/32

    CPC分类号： H04B7/15535 ,  H04B7/15585 ,  H04L27/2607 ,  H04L27/2613

    摘要： A wireless repeater has a receiving antenna for receiving an input signal and a transmitting antenna for transmitting an amplified signal where the input signal is a sum of a remote signal and a feedback signal. The repeater includes an echo canceller receiving the input signal and generating an echo cancelled signal by estimating a feedback channel between the transmitting antenna and the receiving antenna and cancelling a feedback signal estimate from the input signal, an amplifier for amplifying the echo cancelled signal and providing the amplified signal to the transmitting antenna, and a variable delay element receiving the echo cancelled signal and introducing a first delay to the echo cancelled signal. The first delay is selected to optimize the estimation of the feedback channel, thereby optimizing the cancellation of the feedback signal. The delayed echo cancelled signal is coupled to the echo canceller as a reference signal for estimating the feedback channel.

    摘要翻译： 无线中继器具有用于接收输入信号的接收天线和用于发送放大信号的发送天线，其中输入信号是远程信号和反馈信号之和。 中继器包括回波消除器，其接收输入信号并通过估计发射天线和接收天线之间的反馈信道并从输入信号中消除反馈信号估计来产生回波消除信号，放大器用于放大回波消除信号并提供 向发射天线的放大信号，以及接收回声消除信号的可变延迟元件，并向回波消除信号引入第一延迟。 选择第一延迟以优化反馈信道的估计，从而优化反馈信号的消除。 延迟回波消除信号耦合到回波消除器作为用于估计反馈信道的参考信号。

    WIDEBAND ECHO CANCELLATION IN A REPEATER
    7.
    发明申请
    WIDEBAND ECHO CANCELLATION IN A REPEATER 失效
    一个重复的宽带ECHO取消

    公开(公告)号：US20100285733A1

    公开(公告)日：2010-11-11

    申请号：US12609505

    申请日：2009-10-30

    申请人： Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  James Arthur Proctor, JR. ,  Steven J. Howard ,  Hakan Inanoglu ,  Kenneth M. Gainey ,  Michael Mao Wang ,  Tao Tian

    发明人： Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  James Arthur Proctor, JR. ,  Steven J. Howard ,  Hakan Inanoglu ,  Kenneth M. Gainey ,  Michael Mao Wang ,  Tao Tian

    IPC分类号： H04B7/14

    CPC分类号： H04B7/15535 ,  H04B7/15585 ,  H04L27/2607 ,  H04L27/2613

    摘要： A wireless repeater having a receiving antenna for receiving an input signal and a transmitting antenna for transmitting an amplified signal includes first and second front-end circuits and a repeater baseband block coupled between the first and second front-end circuits. The repeater baseband block includes a channel estimation block, an echo canceller implementing time domain echo cancellation, a variable gain stage controlled by a gain control block implementing digital gain control, a first variable delay element introducing a first delay before or after the echo canceller, a second variable delay element introducing a second delay to the output signal. The delayed output signal is coupled to the channel estimation block as a reference signal for estimating the feedback channel, to the echo canceller as a reference signal for estimating the feedback signal, and to the gain control block for monitoring the stability of the repeater.

    摘要翻译： 具有用于接收输入信号的接收天线和用于发送放大信号的发射天线的无线中继器包括耦合在第一和第二前端电路之间的第一和第二前端电路和中继器基带块。 中继器基带块包括信道估计块，实现时域回声消除的回波消除器，实现数字增益控制的增益控制块控制的可变增益级，在回波消除器之前或之后引入第一延迟的第一可变延迟元件， 向输出信号引入第二延迟的第二可变延迟元件。 延迟输出信号作为用于估计反馈信道的参考信号，作为用于估计反馈信号的参考信号的回波消除器和用于监视中继器的稳定性的增益控制块耦合到信道估计块。

    INSERTED PILOT CONSTRUCTION FOR AN ECHO CANCELLATION REPEATER
    8.
    发明申请
    INSERTED PILOT CONSTRUCTION FOR AN ECHO CANCELLATION REPEATER 有权
    用于ECHO CANCELLATION REPEATER的插入式导轨结构

    公开(公告)号：US20100284445A1

    公开(公告)日：2010-11-11

    申请号：US12609579

    申请日：2009-10-30

    申请人： Gwendolyn Denise Barriac ,  Dhananjay Ashok Gore ,  James Arthur Proctor, JR. ,  Michael Mao Wang ,  Tao Tian

    发明人： Gwendolyn Denise Barriac ,  Dhananjay Ashok Gore ,  James Arthur Proctor, JR. ,  Michael Mao Wang ,  Tao Tian

    IPC分类号： H04B3/36

    CPC分类号： H04B7/15535 ,  H04B7/15585 ,  H04L27/2607 ,  H04L27/2613

    摘要： In one embodiment, a device for constructing a pilot signal for use in a wireless repeater where the pilot signal is added to a transmit signal includes one or more pilot generators. Each pilot generator generates a carrier pilot signal associated with a single carrier of the transmit signal and the carrier pilot signals generated by the one or more pilot generators are summed to generate the pilot signal. Each of the one or more pilot generators includes a pilot symbol unit providing multiple data symbols having a predetermined data structure as the carrier pilot signal, a pilot scrambler, a filter, a pilot power determination unit, and a cyclic prefix insertion unit for inserting a cyclic prefix, to the carrier pilot signal. In another embodiment, the pilot symbol unit providing multiple data symbols in frequency domain as the carrier pilot signal.

    摘要翻译： 在一个实施例中，用于构建在无线中继器中使用的导频信号的装置，其中导频信号被添加到发射信号包括一个或多个导频发生器。 每个导频发生器产生与发送信号的单个载波相关联的载波导频信号，并且由一个或多个导频发生器产生的载波导频信号相加以产生导频信号。 一个或多个导频发生器中的每一个包括导频符号单元，其提供具有作为载波导频信号的预定数据结构的多个数据符号，导频扰频器，滤波器，导频功率确定单元和循环前缀插入单元， 循环前缀，到载波导频信号。 在另一个实施例中，导频符号单元在频域中提供多个数据符号作为载波导频信号。