公开(公告)号：US09049065B2

公开(公告)日：2015-06-02

申请号：US12776998

申请日：2010-05-10

申请人： Gwendolyn Denise Barriac ,  Steven J. Howard ,  Dhananjay Ashok Gore

发明人： Gwendolyn Denise Barriac ,  Steven J. Howard ,  Dhananjay Ashok Gore

IPC分类号： H04W24/00 ,  H04L25/02 ,  H04B7/155

CPC分类号： H04L25/0226 ,  H04B7/15585 ,  H04L25/022 ,  H04L25/0242

摘要： A method for estimating a feedback channel for a wireless repeater using frequency domain channel estimation estimates an error correction term using a most recent channel estimate and cancels the error correction term from a current block of the receive signal. Then, the feedback channel is estimated using frequency domain channel estimation and using a current block of the pilot signal and the corrected block of the receive signal. A channel estimate error term may also be estimated and subtracted directly from the channel estimate.

摘要翻译： 使用频域信道估计来估计无线中继器的反馈信道的方法使用最近的信道估计估计误差校正项，并从接收信号的当前块中消除纠错项。 然后，使用频域信道估计并使用导频信号的当前块和接收信号的校正块来估计反馈信道。 也可以从信道估计直接估计和减去信道估计误差项。

公开(公告)号：US08380122B2

公开(公告)日：2013-02-19

申请号：US12708318

申请日：2010-02-18

申请人： Steven J. Howard ,  Tadeusz Jarosinski ,  Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  Michael Mao Wang ,  Tao Tian

发明人： Steven J. Howard ,  Tadeusz Jarosinski ,  Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  Michael Mao Wang ,  Tao Tian

IPC分类号： H04B3/36 ,  H04B7/14

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

摘要： A wireless repeater includes a channel estimation block to estimate a feedback channel between the antennas of the repeater using frequency domain channel estimation. The repeater includes a pilot signal blanking circuit to blank out a selected number of samples of the pilot signal to improve the accuracy of the channel estimation. In another embodiment, the repeater replaces T samples of the pilot signal with a cyclic prefix.

摘要翻译： 无线中继器包括信道估计块，用于使用频域信道估计来估计中继器的天线之间的反馈信道。 中继器包括导频信号消隐电路，用于消除导频信号的选定数目的样本，以提高信道估计的精度。 在另一个实施例中，中继器用循环前缀替换导频信号的T个样本。

公开(公告)号：US20110116531A1

公开(公告)日：2011-05-19

申请号：US12776786

申请日：2010-05-10

申请人： Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  Steven J. Howard

发明人： Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  Steven J. Howard

IPC分类号： H04L25/20

CPC分类号： H04L25/022 ,  H04B7/15585 ,  H04L25/0226

摘要： A method for estimating a feedback channel for a wireless repeater uses frequency domain channel estimation and uses a signal indicative of the amplified signal as a pilot signal. The channel estimation method generates a time domain feedback channel estimate from the frequency domain channel estimation and scales the time domain feedback channel estimate using scaling factors. In one embodiment, the scaling factors are function of a tap index and the block size of the frequency domain channel estimation.

摘要翻译： 用于估计无线中继器的反馈信道的方法使用频域信道估计，并且使用表示放大的信号的信号作为导频信号。 信道估计方法从频域信道估计生成时域反馈信道估计，并使用缩放因子来缩放时域反馈信道估计。 在一个实施例中，缩放因子是抽头索引和频域信道估计的块大小的函数。

公开(公告)号：US20100285736A1

公开(公告)日：2010-11-11

申请号：US12609874

申请日：2009-10-30

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

发明人： Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  Steven J. Howard ,  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 includes an echo canceller to cancel an estimated feedback amount from an input signal and a delay to delay the input signal. The delay may be selected to decorrelate a remote signal from a signal to be transmitted by the repeater.

摘要翻译： 无线中继器包括回波消除器，以从输入信号中消除估计的反馈量，延迟延迟输入信号。 可以选择该延迟以从要由中继器发送的信号去除相关的远程信号。

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。

公开(公告)号：US08358969B2

公开(公告)日：2013-01-22

申请号：US12609874

申请日：2009-10-30

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

发明人： Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  Steven J. Howard ,  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 includes an echo canceller to cancel an estimated feedback amount from an input signal and a delay to delay the input signal. The delay may be selected to decorrelate a remote signal from a signal to be transmitted by the repeater.

摘要翻译： 无线中继器包括回波消除器，以从输入信号中消除估计的反馈量，延迟延迟输入信号。 可以选择该延迟以从要由中继器发送的信号去除相关的远程信号。

公开(公告)号：US20100285738A1

公开(公告)日：2010-11-11

申请号：US12708318

申请日：2010-02-18

申请人： Steven J. Howard ,  Tadeusz Jarosinski ,  Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  Michael Mao Wang ,  Tao Tian

发明人： Steven J. Howard ,  Tadeusz Jarosinski ,  Dhananjay Ashok Gore ,  Gwendolyn Denise Barriac ,  Michael Mao Wang ,  Tao Tian

IPC分类号： H04B17/02

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

摘要： A wireless repeater includes a channel estimation block to estimate a feedback channel between the antennas of the repeater using frequency domain channel estimation. The repeater includes a pilot signal blanking circuit to blank out a selected number of samples of the pilot signal to improve the accuracy of the channel estimation. In another embodiment, the repeater replaces T samples of the pilot signal with a cyclic prefix.

摘要翻译： 无线中继器包括信道估计块，用于使用频域信道估计来估计中继器的天线之间的反馈信道。 中继器包括导频信号消隐电路，用于消除导频信号的选定数目的样本，以提高信道估计的精度。 在另一个实施例中，中继器用循环前缀替换导频信号的T个样本。

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。

公开(公告)号：US20110116392A1

公开(公告)日：2011-05-19

申请号：US12776998

申请日：2010-05-10

申请人： Gwendolyn Denise Barriac ,  Steven J. Howard ,  Dhananjay Ashok Gore

发明人： Gwendolyn Denise Barriac ,  Steven J. Howard ,  Dhananjay Ashok Gore

IPC分类号： H04W24/00

CPC分类号： H04L25/0226 ,  H04B7/15585 ,  H04L25/022 ,  H04L25/0242

摘要： A method for estimating a feedback channel for a wireless repeater using frequency domain channel estimation estimates an error correction term using a most recent channel estimate and cancels the error correction term from a current block of the receive signal. Then, the feedback channel is estimated using frequency domain channel estimation and using a current block of the pilot signal and the corrected block of the receive signal. A channel estimate error term may also be estimated and subtracted directly from the channel estimate.

摘要翻译： 使用频域信道估计来估计无线中继器的反馈信道的方法使用最近的信道估计估计误差校正项，并从接收信号的当前块中消除纠错项。 然后，使用频域信道估计并使用导频信号的当前块和接收信号的校正块来估计反馈信道。 也可以从信道估计直接估计和减去信道估计误差项。

公开(公告)号：US09548851B2

公开(公告)日：2017-01-17

申请号：US11869547

申请日：2007-10-09

申请人： J. Rodney Walton ,  John W. Ketchum ,  John Edward Smee ,  Mark S. Wallace ,  Steven J. Howard

发明人： J. Rodney Walton ,  John W. Ketchum ,  John Edward Smee ,  Mark S. Wallace ,  Steven J. Howard

IPC分类号： H04B7/02 ,  H04L5/02 ,  H04B1/7107 ,  H04B7/04 ,  H04B7/06

CPC分类号： H04B7/043 ,  H04B1/71072 ,  H04B7/0408 ,  H04B7/0413 ,  H04B7/0421 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0697 ,  H04B17/309 ,  H04L5/023 ,  H04W16/28

摘要： An uplink channel response matrix is obtained for each terminal and decomposed to obtain a steering vector used by the terminal to transmit on the uplink. An “effective” uplink channel response vector is formed for each terminal based on its steering vector and its channel response matrix. Multiple sets of terminals are evaluated based on their effective channel response vectors to determine the best set (e.g., with highest overall throughput) for uplink transmission. Each selected terminal performs spatial processing on its data symbol stream with its steering vector and transmits its spatially processed data symbol stream to an access point. The multiple selected terminals simultaneously transmit their data symbol streams via their respective MIMO channels to the access point. The access point performs receiver spatial processing on its received symbol streams in accordance with a receiver spatial processing technique to recover the data symbol streams transmitted by the selected terminals.

摘要翻译： 获得每个终端的上行链路信道响应矩阵，并对其进行分解，得到终端在上行链路上使用的导向矢量。 基于其导向向量及其信道响应矩阵，为每个终端形成“有效”上行链路信道响应向量。 基于其有效信道响应向量来评估多组终端，以确定用于上行链路传输的最佳集合（例如具有最高总吞吐量）。 每个选择的终端利用其导向向量对其数据符号流执行空间处理，并将其空间处理的数据符号流发送到接入点。 多个选择的终端通过其相应的MIMO信道同时将其数据符号流发送到接入点。 接入点根据接收机空间处理技术对其接收到的符号流执行接收机空间处理，以恢复由所选终端发送的数据符号流。