公开(公告)号：WO2013022601A1

公开(公告)日：2013-02-14

申请号：PCT/US2012/048091

申请日：2012-07-25

Applicant: QUALCOMM INCORPORATED ,  GORE, Dhananjay Ashok ,  BARRIAC, Gwendolyn Denise ,  WANG, Michael Mao ,  TIAN, Tao

Inventor： GORE, Dhananjay Ashok ,  BARRIAC, Gwendolyn Denise ,  WANG, Michael Mao ,  TIAN, Tao

IPC: H04B7/155

CPC classification number: H04B7/15585 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/446

Abstract: A wireless repeater introduces a low level noise to the signal path of the repeater where the introduced noise is used to facilitate channel estimation. The introduced low power level noise may be added to the receive signal or to the transmit signal. The low power noise signal ensures that the repeater always has a reference signal for performing channel estimation, even when the repeater is not receiving any incoming signal traffic. In one embodiment, a low noise signal is inserted to the transmit circuit of the repeater. In another embodiment, the repeater is configured to increase the noise figure of the receive circuit where the detected noise figure acts as a receive signal.

Abstract translation: 无线中继器向中继器的信号路径引入低电平噪声，其中引入的噪声用于促进信道估计。 引入的低功率电平噪声可以被添加到接收信号或发送信号。 低功率噪声信号确保中继器总是具有用于执行信道估计的参考信号，即使中继器没有接收任何输入信号业务。 在一个实施例中，低噪声信号被插入到中继器的发射电路。 在另一个实施例中，中继器被配置为增加接收电路的噪声系数，其中检测到的噪声系数作为接收信号。

公开(公告)号：WO2012170044A1

公开(公告)日：2012-12-13

申请号：PCT/US2011/043436

申请日：2011-07-08

Applicant: QUALCOMM INCORPORATED ,  GORE, Dhananjay Ashok ,  PROCTOR, James Arthur Jr.

Inventor： GORE, Dhananjay Ashok ,  PROCTOR, James Arthur Jr.

IPC: H04B7/155

CPC classification number: H04B7/15542

Abstract: A method in a wireless repeater selects one or more carriers out of all carriers for amplification and transmission. The non-selected carriers may be blocked to mitigate delay spread, uplink noise contribution or other effects on the repeater environment due to multiple repeaters. The carriers may be selected based on signal characteristics, signal usage, and/or other parameters.

Abstract translation: 无线中继器中的方法从所有载波中选择一个或多个载波进行放大和发送。 由于多个中继器，可以阻止未选择的载波以减轻延迟扩展，上行链路噪声贡献或对中继器环境的其他影响。 可以基于信号特性，信号使用和/或其他参数来选择载波。

公开(公告)号：WO2012142339A1

公开(公告)日：2012-10-18

申请号：PCT/US2012/033397

申请日：2012-04-12

Applicant: QUALCOMM INCORPORATED ,  WANG, Michael Mao ,  GORE, Dhananjay Ashok ,  BARRIAC, Gwendolyn Denise

Inventor： WANG, Michael Mao ,  GORE, Dhananjay Ashok ,  BARRIAC, Gwendolyn Denise

IPC: H04W16/26 ,  H04W48/12 ,  H04B7/155

CPC classification number: H04B7/15528 ,  H04L5/0007 ,  H04W48/10 ,  H04W84/047

Abstract: In an embodiment, a first repeater configures a beacon signal that identifies the first repeater to one or more other repeaters. The first repeater transmits the configured beacon signal at a given transmission power level to the one or more other repeaters. The transmitted beacon signal is received at least by a second repeater. The second repeater reduces interference associated with other transmissions from the first repeater, such as retransmissions of donor signals, based on the received beacon signal.

Abstract translation: 在一个实施例中，第一中继器将识别第一中继器的信标信号配置到一个或多个其他中继器。 第一中继器以给定的发射功率电平将配置的信标信号发射到一个或多个其它中继器。 所发送的信标信号至少由第二中继器接收。 第二中继器基于接收到的信标信号来减少与来自第一中继器的其他传输相关联的干扰，例如施主信号的重传。

公开(公告)号：WO2010132455A3

公开(公告)日：2011-03-24

申请号：PCT/US2010034394

申请日：2010-05-11

Applicant: QUALCOMM INC ,  BLACK PETER JOHN ,  GORE DHANANJAY ASHOK ,  BARRIAC GWENDOLYN DENISE

Inventor： BLACK PETER JOHN ,  GORE DHANANJAY ASHOK ,  BARRIAC GWENDOLYN DENISE

IPC: H04B7/155 ,  H04B17/40

CPC classification number: H04B7/15535 ,  H04B7/15585 ,  H04L27/2607 ,  H04L27/2613

Abstract: 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.

Abstract translation: 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。

公开(公告)号：WO2011017036A1

公开(公告)日：2011-02-10

申请号：PCT/US2010/043175

申请日：2010-07-24

Applicant: QUALCOMM INCORPORATED ,  SAMPATH, Hemanth ,  GORE, Dhananjay Ashok ,  JONES IV, Vincent Knowles

Inventor： SAMPATH, Hemanth ,  GORE, Dhananjay Ashok ,  JONES IV, Vincent Knowles

IPC: H04B1/52

CPC classification number: H04B1/525 ,  H04B1/0032

Abstract: A method for detecting and reducing aliasing is described. The method may be implemented by a first wireless device. A first signal may be transmitted on a first frequency channel. A second signal may be received on a second frequency channel. The second signal may be received concurrently with the transmission of the first signal. Aliasing of the first signal on the second signal may be detected. Aliasing may be reduced.

Abstract translation: 描述了一种用于检测和减少混叠的方法。 该方法可以由第一无线设备来实现。 可以在第一频率信道上发送第一信号。 可以在第二频率信道上接收第二信号。 可以与第一信号的传输同时接收第二信号。 可以检测第二信号上的第一信号的混叠。 混淆可能会减少。

公开(公告)号：WO2010132475A2

公开(公告)日：2010-11-18

申请号：PCT/US2010/034416

申请日：2010-05-11

Applicant: QUALCOMM Incorporated ,  GORE, Dhananjay Ashok ,  BARRIAC, Gwendolyn Denise ,  HOWARD, Steven J.

Inventor： GORE, Dhananjay Ashok ,  BARRIAC, Gwendolyn Denise ,  HOWARD, Steven J.

IPC: H04L25/02

CPC classification number: H04L25/022 ,  H04B7/15585 ,  H04L25/0226

Abstract: 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.

Abstract translation: 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：WO2010132463A3

公开(公告)日：2010-11-18

申请号：PCT/US2010/034403

申请日：2010-05-11

Applicant: QUALCOMM INCORPORATED ,  WANG, Michael Mao ,  BARRIAC, Gwendolyn Denise ,  GORE, Dhananjay Ashok

Inventor： WANG, Michael Mao ,  BARRIAC, Gwendolyn Denise ,  GORE, Dhananjay Ashok

IPC: H04B7/155

Abstract: A method for controlling gain in a wireless repeater includes computing a gain control metric indicative of a loop gain of the repeater and detecting changes in a signal power of a gain control input signal where the gain control input signal is taken from any point in the feedback loop of the repeater. When a large power swing in the gain control input signal is detected, the method operates to discard at least a portion of each gain control metric measurement for a first duration before continuing with computing the gain control metric. In another embodiment, the method may include discarding samples of the gain control input signal used in computing the gain control metric for a first duration when a large power swing in the gain control input signal is detected.

公开(公告)号：WO2009049039A1

公开(公告)日：2009-04-16

申请号：PCT/US2008/079333

申请日：2008-10-09

Applicant: QUALCOMM Incorporated ,  GORE, Dhananjay Ashok ,  SAMPATH, Hemanth ,  TEAGUE, Edward Harrison

Inventor： GORE, Dhananjay Ashok ,  SAMPATH, Hemanth ,  TEAGUE, Edward Harrison

IPC: H04B7/08 ,  H04L25/03

CPC classification number: H04L25/03159 ,  H04L25/0204 ,  H04L25/021 ,  H04L25/0244 ,  H04L25/0256 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03605

Abstract: Systems and methodologies are described for equalizing received signals in a wireless communication environment. Using multiple transmit and/or receive antennas and MIMO technology, multiple data streams can be transmitted within a single tone. During equalization (210), receivers can separate data received within a tone into individual data streams. The equalization process generally is computationally expensive. Equalizer functions include the inverse matrix operation, which can be computed using the fast square root method; however, the fast square root method involves large numbers of computations for a set of matrices, where the size of a matrix in the set of matrices increases with the number of transmit or receive antennas. Utilizing a modification of the fast square root method (208), a subset of the elements of the matrices can be selected and updated to reduce the number and/or complexity of computations. Updating comprises determining a rotation matrix in accordance with a Householder reflection approach.

Abstract translation: 描述了用于在无线通信环境中均衡接收信号的系统和方法。 使用多个发射和/或接收天线和MIMO技术，可以在单个音调内传输多个数据流。 在均衡（210）期间，接收机可以将在一个音调内接收到的数据分离成各自的数据流。 均衡过程通常在计算上是昂贵的。 均衡器功能包括逆矩阵运算，可以使用快速平方根法计算; 然而，快速平方根方法涉及对于一组矩阵的大量计算，其中矩阵集合中的矩阵的大小随着发射或接收天线的数量而增加。 利用快速平方根方法（208）的修改，可以选择和更新矩阵元素的子集，以减少计算的数量和/或复杂度。 更新包括根据Householder反射方法确定旋转矩阵。

公开(公告)号：WO2006124810A3

公开(公告)日：2009-04-16

申请号：PCT/US2006018789

申请日：2006-05-16

Applicant: QUALCOMM INC ,  GORE DHANANJAY ASHOK ,  AGRAWAL AVNEESH

Inventor： GORE DHANANJAY ASHOK ,  AGRAWAL AVNEESH

IPC: H04J11/00

CPC classification number: H04B1/69 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0226 ,  H04L25/0232 ,  H04L27/2647

Abstract: Techniques to perform channel estimation with pilot weighting are described (Fig 5B). A receiver receives at least one transmission symbol for a pilot transmitted by a transmitter. Each transmission symbol may be generated with a single-carrier multiplexing scheme (e.g., IFDMA or LFDMA) or a multi-carrier multiplexing scheme (e.g., OFDMA). The receiver processes each received transmission symbol and obtains received pilot values (562). The receiver may derive an interference estimate based on the received pilot values and may estimate the reliability of the received pilot values based on the interference estimate (564). The receiver determines weights for the received pilot values based on the transmitted pilot values, the estimated reliability of the received pilot values, and/or other information (568). The receiver derives a channel estimate based on the received pilot values and the weights (570). The receiver then performs data detection (e.g., equalization) on received data values with the channel estimate (572).

Abstract translation: 描述用导频加权来执行信道估计的技术（图5B）。 接收机接收由发射机发送的导频的至少一个传输符号。 可以使用单载波复用方案（例如，IFDMA或LFDMA）或多载波复用方案（例如，OFDMA）生成每个传输符号。 接收机处理每个接收到的传输符号并获得接收到的导频值（562）。 接收机可以基于接收到的导频值导出干扰估计，并且可以基于干扰估计来估计接收到的导频值的可靠性（564）。 接收机基于发送的导频值，接收到的导频值的估计可靠性和/或其他信息来确定接收到的导频值的权重（568）。 接收器基于接收到的导频值和权重导出信道估计（570）。 然后，接收机对具有信道估计的接收数据值执行数据检测（例如，均衡）（572）。

公开(公告)号：WO2008116172A3

公开(公告)日：2008-12-31

申请号：PCT/US2008057864

申请日：2008-03-21

Applicant: QUALCOMM INC ,  BUDIANU PETRU CRISTIAN ,  SAMPATH HEMANTH ,  GOROKHOV ALEXEI ,  GORE DHANANJAY ASHOK

Inventor： BUDIANU PETRU CRISTIAN ,  SAMPATH HEMANTH ,  GOROKHOV ALEXEI ,  GORE DHANANJAY ASHOK

IPC: H04L5/02 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26

CPC classification number: H04L5/023 ,  H04L25/0232 ,  H04L25/0244 ,  H04L25/03019 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03426

Abstract: Systems and methodologies are described that facilitate equalization of received signals in a wireless communication environment. Multiple transmit and/or receive antennas and utilize MIMO technology to enhance performance. A single tile of transmitted data, including a set of modulation symbols, can be received at multiple receive antennas, resulting in multiple tiles of received modulation symbols. Corresponding modulation symbols from multiple received tiles can be processed as a function of channel and interference estimates to generate a single equalized modulation symbol. Typically, the equalization process is computationally expensive. However, the channels are highly correlated. This correlation is reflected in the channel estimates and can be utilized to reduce complex equalization operations. In particular, a subset of the equalizers can be generated based upon the equalizer function and the remainder can be generated using interpolation. In addition, the equalizer function itself can be simplified.

Abstract translation: 描述了有助于在无线通信环境中均衡接收信号的系统和方法。 多个发射和/或接收天线，并利用MIMO技术来提高性能。 可以在多个接收天线处接收包括一组调制符号的传输数据的单个瓦片，导致接收到的调制符号的多个瓦片。 来自多个接收到的瓦片的对应调制符号可以作为信道和干扰估计的函数被处理以生成单个均衡调制符号。 通常，均衡过程在计算上是昂贵的。 但是，渠道高度相关。 这种相关性反映在信道估计中，可用于减少复杂的均衡操作。 具体而言，可以基于均衡器功能生成均衡器的子集，并且可以使用内插生成余数。 另外，均衡器功能本身可以被简化。