公开(公告)号：US08295417B2

公开(公告)日：2012-10-23

申请号：US12133636

申请日：2008-06-05

Applicant: Douglas A. Cairns ,  Gregory E. Bottomley ,  Andreas Cedergren ,  Tracy L. Fulghum ,  Elias Jonsson

Inventor： Douglas A. Cairns ,  Gregory E. Bottomley ,  Andreas Cedergren ,  Tracy L. Fulghum ,  Elias Jonsson

IPC: H04B7/10

CPC classification number: H04B1/7117 ,  H04B1/712

Abstract: Methods and apparatus for determining an impairment covariance matrix for use in an interference-suppressing CDMA receiver are disclosed. In several of the disclosed embodiments, precise information regarding signal propagation delays is not needed. An exemplary method includes the selection of a plurality of processing delays for processing a received CDMA signal. Net channel coefficients for the processing delays are estimated and used to calculate an impairment covariance matrix. The impairment covariance matrix is calculated as a function of the estimated net channel coefficients and the processing delays, without estimating a propagation medium channel response for the received signal.

Abstract translation: 公开了用于确定用于干扰抑制CDMA接收机的损害协方差矩阵的方法和装置。 在所公开的几个实施例中，不需要关于信号传播延迟的精确信息。 一种示例性方法包括选择用于处理所接收的CDMA信号的多个处理延迟。 用于处理延迟的净通道系数被估计并用于计算损害协方差矩阵。 损伤协方差矩阵作为估计的净通道系数和处理延迟的函数计算，而不估计接收信号的传播介质通道响应。

公开(公告)号：US08160527B2

公开(公告)日：2012-04-17

申请号：US12414202

申请日：2009-03-30

Applicant: Elias Jonsson ,  Niclas Danielsson

Inventor： Elias Jonsson ,  Niclas Danielsson

IPC: H04B1/10

CPC classification number: H03G3/3078 ,  H03G3/3068

Abstract: Methods and apparatus for providing automatic gain control (AGC) for received multi-carrier signals are disclosed. A receiver circuit comprises a common analog signal path, which includes an analog variable-gain circuit and an analog-to-digital converter, and further comprises first and second carrier-specific, digital variable-gain circuits corresponding to first and second carriers of the received multi-carrier signal, respectively. The receiver circuit further includes a gain control circuit configured to control the analog and digital variable-gain circuits and to allot gain adjustments to the analog variable-gain circuit based on a difference between carrier signal levels for the first and second carriers. In some embodiments, the gain control circuit selectively operates in an all-carrier mode, in which analog gain adjustments are calculated from both of the carrier signal levels, or in an unequal-priority mode, in which analog gain adjustments are calculated from only one of the first and second carrier signal levels.

Abstract translation: 公开了用于为接收的多载波信号提供自动增益控制（AGC）的方法和装置。 接收器电路包括公共模拟信号路径，其包括模拟可变增益电路和模数转换器，并且还包括对应于第一和第二载波的第一和第二载波特定的数字可变增益电路 分别接收多载波信号。 接收器电路还包括增益控制电路，其被配置为基于第一和第二载波的载波信号电平之间的差异来控制模拟和数字可变增益电路并且向模拟可变增益电路分配增益调整。 在一些实施例中，增益控制电路选择性地以全载波模式操作，其中从两个载波信号电平或不等优先级模式计算模拟增益调整，其中仅从一个模式增益调整 的第一和第二载波信号电平。

公开(公告)号：US20120082197A1

公开(公告)日：2012-04-05

申请号：US12976519

申请日：2010-12-22

Applicant: Elias Jonsson ,  Yoshitaka Murata ,  Jaroslaw Niewczas ,  Amit Singh ,  Kazuyoshi Uesaka

Inventor： Elias Jonsson ,  Yoshitaka Murata ,  Jaroslaw Niewczas ,  Amit Singh ,  Kazuyoshi Uesaka

IPC: H04W24/00 ,  H04B1/06

CPC classification number: H04B1/712

Abstract: A set of channelization codes to be monitored is divided into two groups. The first group includes those codes for which an associated symbol modulation and transmit-diversity scheme is known. In the second group are those codes that are characterized by an unknown symbol modulation or unknown transmit-diversity scheme. The quality of the transmission of each code is then evaluated, using a metric. The metric in turn is used to determine whether the code should be used in estimating the covariance matrix by correlating the RAKE data corresponding to the code (i.e., by computing a correlation matrix for the code) or by first subtracting the channel estimates from the channel samples before correlation (i.e., by computing a covariance matrix for the code). An impairment covariance matrix is computed from the covariance matrices and correlation matrices so computed.

Abstract translation: 要监视的一组信道化代码被分为两组。 第一组包括已知相关联的码元调制和发射分集方案的那些码。 在第二组中是以未知符号调制或未知传输分集方案为特征的代码。 然后使用度量来评估每个代码的传输质量。 该度量依次用于确定代码是否应该用于通过将与代码相对应的RAKE数据相关联来估计协方差矩阵（即，通过计算代码的相关矩阵），或者首先从信道中减去信道估计 相关前的样本（即通过计算代码的协方差矩阵）。 根据所计算的协方差矩阵和相关矩阵计算损伤协方差矩阵。

公开(公告)号：US08121231B2

公开(公告)日：2012-02-21

申请号：US12278379

申请日：2007-02-08

Applicant: Elias Jonsson

Inventor： Elias Jonsson

IPC: H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08

CPC classification number: H04L27/2647 ,  H04B1/707 ,  H04L25/0204 ,  H04L25/0216 ,  H04L25/022 ,  H04L25/0236 ,  H04L25/0244

Abstract: A method and a device for channel response determination for a wireless communication system. The method comprises generating a first vector of channel responses from channel estimations obtained by using a training signal. A second vector of regularized channel responses is generated by applying to the first vector a regularization algorithm. The algorithm is operative such that a second difference between consecutive regularized channel responses of the second vector is less than a first difference between consecutive channel responses of the first vector.

Abstract translation: 一种用于无线通信系统的信道响应确定的方法和装置。 该方法包括从通过使用训练信号获得的信道估计产生信道响应的第一矢量。 通过将正则化算法应用于第一向量来生成正则化信道响应的第二向量。 该算法的操作使得第二向量的连续正则化信道响应之间的第二个差值小于第一个向量的连续信道响应之间的第一个差值。

公开(公告)号：US20110129000A1

公开(公告)日：2011-06-02

申请号：US12628341

申请日：2009-12-01

Applicant: Douglas A. Cairns ,  Gregory E. Bottomley ,  Elias Jonsson

Inventor： Douglas A. Cairns ,  Gregory E. Bottomley ,  Elias Jonsson

IPC: H04B1/707 ,  H04L27/06

CPC classification number: H04L25/03006 ,  H04B1/71057 ,  H04B2201/709727 ,  H04L25/03178 ,  H04L25/03203 ,  H04L25/03331 ,  H04L2025/03426

Abstract: The computation of code-specific channel matrices for an Assisted Maximum Likelihood Detection (AMLD) receiver comprises separately computing high rate matrices that change each symbol period, and a low rate matrix that is substantially constant over a plurality of symbol periods. The high and low rate matrices are combined to generate a code-specific channel matrix for each receiver stage. The high rate matrices include scrambling and spreading code information, and the low rate matrices include information on the net channel response and combining weights. The low rate matrices are efficiently computed by a linear convolution in the frequency domain of the net channel response and combining weights (with zero padding to avoid circular convolution), then transforming the convolution to the time domain and extracting matrix elements. Where the combining weights are constant across stages, a common code-specific channel matrix may be computed and used in multiple AMLD receiver stages.

Abstract translation: 用于辅助最大似然检测（AMLD）接收机的代码特定信道矩阵的计算包括分别计算改变每个符号周期的高速率矩阵和在多个符号周期上基本上恒定的低速率矩阵。 组合高速和低速率矩阵以为每个接收机级生成代码特定的信道矩阵。 高速率矩阵包括加扰和扩展码信息，低速率矩阵包括关于网络信道响应和组合权重的信息。 低速率矩阵通过网络通道响应的频域中的线性卷积和组合权重（零填充以避免循环卷积）有效地计算，然后将卷积变换到时域并提取矩阵元素。 在组合权重跨越阶段恒定的情况下，可以在多个AMLD接收机阶段中计算和使用公共的特定码通道矩阵。

公开(公告)号：US20110075706A1

公开(公告)日：2011-03-31

申请号：US12566749

申请日：2009-09-25

Applicant: Douglas A. Cairns ,  Jaroslaw Niewczas ,  Yoshitaka Murata ,  Elias Jonsson

Inventor： Douglas A. Cairns ,  Jaroslaw Niewczas ,  Yoshitaka Murata ,  Elias Jonsson

IPC: H04B1/707 ,  H04B1/10

CPC classification number: H04B1/712 ,  H04B2201/7071

Abstract: Adaptive reconfiguration of a wireless receiver is enabled based on channel geometry. According to an embodiment, the wireless receiver includes a geometry factor processing module and signal processing modules, e.g. such as but not limited to an SIR estimation module, a power estimation module, a despreading module, a low-pass filter, a combing weight generation module, a coefficient estimation module, a synchronization control channel interference canceller module, etc. The geometry factor processing module determines a geometry factor for the channel over which signals are transmitted to the wireless receiver, the geometry factor being a measure of the ratio of total transmitted power received by the wireless receiver to total interference plus noise power at the wireless receiver. One or more of the receiver signal processing modules are reconfigurable based on the geometry factor.

Abstract translation: 基于信道几何形式启用无线接收机的自适应重新配置。 根据实施例，无线接收机包括几何因子处理模块和信号处理模块，例如， 例如但不限于SIR估计模块，功率估计模块，解扩散模块，低通滤波器，组合权重生成模块，系数估计模块，同步控制信道干扰消除模块等。几何因子 处理模块确定信号被传输到无线接收器的信道的几何因子，几何因子是由无线接收机接收的总发射功率与无线接收机处的总干扰加上噪声功率的比率的度量。 接收机信号处理模块中的一个或多个可以基于几何因子来重新配置。

公开(公告)号：US20100303132A1

公开(公告)日：2010-12-02

申请号：US12472742

申请日：2009-05-27

Applicant: Elias Jonsson ,  Oskar Drugge ,  Douglas A. Cairns

Inventor： Elias Jonsson ,  Oskar Drugge ,  Douglas A. Cairns

IPC: H04B1/707 ,  H04L27/28 ,  H04L27/00 ,  H04B1/10

CPC classification number: H04B1/7117 ,  H04L25/0202

Abstract: A multi-carrier linear equalization receiver, e.g., a RAKE receiver or chip equalization receiver, is described herein. The multi-carrier receiver distributes processing delays among a plurality of received carriers based on a dispersion determined for each carrier. The receiver initially allocates a minimum number of processing delays sufficient for light dispersion to each carrier. For the dispersive carriers, the receiver allocates one or more additional processing delays. In one embodiment, the additional processing delays are allocated to the dispersive carriers based on SIR.

Abstract translation: 这里描述了多载波线性均衡接收机，例如RAKE接收机或码片均衡接收机。 多载波接收机基于为每个载波确定的色散，在多个接收载波中分配处理延迟。 接收机首先为每个载波分配足够的光散射的最小数量的处理延迟。 对于分散载体，接收机分配一个或多个附加的处理延迟。 在一个实施例中，基于SIR将附加处理延迟分配给色散载波。

公开(公告)号：US20100248665A1

公开(公告)日：2010-09-30

申请号：US12414202

申请日：2009-03-30

Applicant: Elias Jonsson ,  Niclas Danielsson

Inventor： Elias Jonsson ,  Niclas Danielsson

IPC: H04B7/08

CPC classification number: H03G3/3078 ,  H03G3/3068

Abstract: Methods and apparatus for providing automatic gain control (AGC) for received multi-carrier signals are disclosed. A receiver circuit comprises a common analog signal path, which includes an analog variable-gain circuit and an analog-to-digital converter, and further comprises first and second carrier-specific, digital variable-gain circuits corresponding to first and second carriers of the received multi-carrier signal, respectively. The receiver circuit further includes a gain control circuit configured to control the analog and digital variable-gain circuits and to allot gain adjustments to the analog variable-gain circuit based on a difference between carrier signal levels for the first and second carriers. In some embodiments, the gain control circuit selectively operates in an all-carrier mode, in which analog gain adjustments are calculated from both of the carrier signal levels, or in an unequal-priority mode, in which analog gain adjustments are calculated from only one of the first and second carrier signal levels.

Abstract translation: 公开了用于为接收的多载波信号提供自动增益控制（AGC）的方法和装置。 接收器电路包括公共模拟信号路径，其包括模拟可变增益电路和模数转换器，并且还包括对应于第一和第二载波的第一和第二载波特定的数字可变增益电路 分别接收多载波信号。 接收器电路还包括增益控制电路，其被配置为基于第一和第二载波的载波信号电平之间的差异来控制模拟和数字可变增益电路并且向模拟可变增益电路分配增益调整。 在一些实施例中，增益控制电路选择性地以全载波模式操作，其中从两个载波信号电平或不等优先级模式计算模拟增益调整，其中仅从一个模式增益调整 的第一和第二载波信号电平。

公开(公告)号：US20100238980A1

公开(公告)日：2010-09-23

申请号：US12408939

申请日：2009-03-23

Applicant: Douglas A. Cairns ,  Elias Jonsson ,  Kazuyoshi Uesaka

Inventor： Douglas A. Cairns ,  Elias Jonsson ,  Kazuyoshi Uesaka

IPC: H04B1/707

CPC classification number: H04B1/7115 ,  H04B1/7117 ,  H04B2201/709727 ,  H04L25/0216

Abstract: The placement of processing delays may be adjusted to facilitate signal reception. In an example embodiment, a composite signal having multiple signal images corresponding to multiple reception delays is received. A root-mean-square (RMS) delay spread is ascertained for the multiple reception delays that correspond to the multiple signal images of the composite signal. A set of temporal points is produced responsive to the RMS delay spread. Multiple processing delays are placed based on the set of temporal points. In different example implementations, the set of temporal points (e.g., of a grid) may be produced by adjusting a spacing between temporal points, by adjusting a total number of temporal points in the set, or by changing a center location of the set. The spacing and number of points may be adjusted responsive to the RMS delay spread. The center location may be adjusted responsive to at least one calculated delay.

Abstract translation: 可以调整处理延迟的布置以促进信号接收。 在示例实施例中，接收具有对应于多个接收延迟的多个信号图像的复合信号。 确定对应于复合信号的多个信号图像的多个接收延迟的均方根（RMS）延迟扩展。 响应于RMS延迟扩展产生一组时间点。 基于一组时间点放置多个处理延迟。 在不同的示例实现中，可以通过调整时间点之间的间隔，通过调整集合中的时间点的总数，或者通过改变集合的中心位置来产生时间点集合（例如，网格）。 响应于RMS延迟扩展可以调整点的间隔和数量。 可以响应于至少一个计算的延迟来调整中心位置。

公开(公告)号：US20100215075A1

公开(公告)日：2010-08-26

申请号：US12391796

申请日：2009-02-24

Applicant: Elias Jonsson ,  Andreas Cedergren

Inventor： Elias Jonsson ,  Andreas Cedergren

IPC: H04B1/69 ,  H04L1/02

CPC classification number: H04B7/0413

Abstract: Methods and apparatus for processing a received multi-stream (MIMO) signal, and in particular for estimating a per-code traffic-channel-to-pilot power ratio for the MIMO signal are disclosed. An exemplary method includes the calculation of an average symbol amplitude or average symbol power level from a plurality of de-spread traffic channel symbols received in a first transmission slot and the estimation of a corresponding pilot symbol amplitude or pilot symbol power level, based on an estimated propagation channel response and at least one of a plurality of precoding vectors used to generate the MIMO signal. A per-code traffic-channel-to-pilot power ratio for the first transmission slot is computed by dividing the average symbol amplitude or average symbol power level by the corresponding pilot symbol amplitude or pilot symbol power level.

Abstract translation: 公开了用于处理接收的多流（MIMO）信号的方法和装置，特别是用于估计MIMO信号的每代码业务信道到导频功率比的方法和装置。 一种示例性方法包括：基于在第一传输时隙中接收的多个解扩业务信道符号中的平均符号幅度或平均符号功率电平的计算，以及相应导频符号幅度或导频符号功率电平的估计， 估计的传播信道响应以及用于生成MIMO信号的多个预编码矢量中的至少一个。 通过将平均符号幅度或平均符号功率电平除以相应的导频符号幅度或导频符号功率电平来计算用于第一传输时隙的每代码业务信道到导频功率比。