公开(公告)号：US20100020854A1

公开(公告)日：2010-01-28

申请号：US12177498

申请日：2008-07-22

Applicant: Ning He ,  Gregory E. Bottomley ,  Erik Larsson

Inventor： Ning He ,  Gregory E. Bottomley ,  Erik Larsson

IPC: H04B1/707 ,  H04J13/00

CPC classification number: H04B1/712 ,  H04B2201/709727

Abstract: According to the teachings presented herein, a method and apparatus for communication signal processing advantageously use a mix of parametric and non-parametric correlation estimation in communication signal processing. Non-parametric estimation generates an “overall” correlation estimate for a received communication signal, and parametric estimation generates a “component” correlation estimate. The component correlation estimate is removed from the overall correlation estimate to form a partial correlation estimate that is used to process the received communication signal at least initially, such as in a pre-equalization stage. The overall and component correlation estimates are generated as impairment and/or data correlation estimates.

Abstract translation: 根据本文给出的教导，用于通信信号处理的方法和装置有利地在通信信号处理中使用参数和非参数相关估计的混合。 非参数估计对接收到的通信信号产生“总体”相关估计，参数估计产生“分量”相关估计。 从总体相关估计中去除分量相关估计，以形成一个部分相关估计，该估计用于至少最初处理接收的通信信号，例如在预均衡阶段。 总体和分量相关估计是作为减值和/或数据相关估计产生的。

公开(公告)号：US20100004015A1

公开(公告)日：2010-01-07

申请号：US11722237

申请日：2005-12-19

Applicant: Johan Nilsson ,  Bengt Lindoff

Inventor： Johan Nilsson ,  Bengt Lindoff

IPC: H04B7/005

CPC classification number: H04W52/26 ,  H04B7/0628 ,  H04B7/0634 ,  H04B2201/709727 ,  H04L1/0006 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/1671 ,  H04W52/08 ,  H04W52/10 ,  H04W52/12 ,  H04W52/262 ,  H04W52/286 ,  H04W52/32 ,  H04W52/58

Abstract: Methods and devices in a wireless communication system are provided, in which a first portion and a second portion of signals are transmitted on a physical channel to a first transceiver from a second transceiver. A method for controlling transmission parameters in the wireless communication system comprises the steps of: transmitting an indication indicating that the first and the second receiver processing algorithms are used in the first transceiver to process the first and second portions, respectively, of signals received on the physical channel; receiving the indication at the second transceiver; and adjusting, at the second transceiver in response to the indication, a transmission parameter for at least one of the first and second portions of signals to be transmitted on the physical channel to the first transceiver. The indication could be transmitted from the first transceiver, or it could be determined through evaluations carried out at the second transceiver.

Abstract translation: 提供了一种在无线通信系统中的方法和设备，其中信号的第一部分和第二部分在物理信道上从第二收发器发送到第一收发器。 一种用于控制无线通信系统中的传输参数的方法，包括以下步骤：发送指示在第一收发信机中使用第一和第二接收机处理算法的指示，分别处理第一和第二接收机处接收的信号的第一和第二部分 物理通道; 在所述第二收发器处接收所述指示; 以及响应于所述指示在所述第二收发器处调整要在所述物理信道上发送到所述第一收发器的信号的所述第一和第二部分信号中的至少一个的传输参数。 该指示可以从第一收发器发送，或者可以通过在第二收发器处执行的评估来确定。

公开(公告)号：US20090257477A1

公开(公告)日：2009-10-15

申请号：US12103145

申请日：2008-04-15

Applicant: Ali S. Khayrallah ,  Carmela Cozzo ,  Tracy L. Fulghum

Inventor： Ali S. Khayrallah ,  Carmela Cozzo ,  Tracy L. Fulghum

IPC: H04B1/707 ,  H04B1/10 ,  H04L27/01

CPC classification number: H04B1/7105 ,  H04B1/71072 ,  H04B1/712 ,  H04B2201/709727

Abstract: Methods and apparatus for processing a composite communication signal comprising two or more received signals of interest are disclosed. An interference-suppressing receiver, which may comprise a G-Rake receiver or a linear chip equalizer, utilizes a square-root covariance matrix in processing received signals, where the square-root covariance matrix represents impairment covariance or data covariance for the composite communication signal. In an exemplary method, a receiver detects symbols, corresponding to a signal of interest, from the composite communication signal, using processing weights calculated from a square-root covariance matrix and a net channel response for the signal of interest. The method further comprises calculating a reconstructed version of the signal of interest from the detected first symbols, generating an updated communication signal by subtracting the reconstructed version of the first signal of interest from the composite communication signal, and updating the square-root covariance matrix to obtain an updated square-root covariance matrix.

Abstract translation: 公开了用于处理包括两个或更多个所关注的信号的复合通信信号的方法和装置。 可以包括G-Rake接收机或线性码片均衡器的干扰抑制接收机在处理接收信号中使用平方根协方差矩阵，其中平方根协方差矩阵表示复合通信信号的损害协方差或数据协方差 。 在一种示例性方法中，接收机使用从平方根协方差矩阵计算的处理权重和感兴趣信号的净信道响应，从复合通信信号中检测与感兴趣信号相对应的符号。 该方法还包括从检测到的第一符号计算感兴趣信号的重构版本，通过从复合通信信号中减去感兴趣的第一信号的重构版本，并将平方根协方差矩阵更新为 获得更新的平方根协方差矩阵。

公开(公告)号：US07602838B2

公开(公告)日：2009-10-13

申请号：US11314740

申请日：2005-12-22

Applicant: Gregory E. Bottomley ,  Jung-Fu Cheng

Inventor： Gregory E. Bottomley ,  Jung-Fu Cheng

IPC: H04B1/00 ,  H04B1/10

CPC classification number: H03M13/2957 ,  H03M13/6331 ,  H04B1/712 ,  H04B2201/709727 ,  H04L1/0048 ,  H04L1/005 ,  H04L25/03063

Abstract: A linear turbo-equalizer for use in a CDMA receiver equalizes a despread received signal (rather than the spread received signal) to suppress self-interference resulting from coupling between transmitted symbols. In an example implementation, a linear equalizer based on a generalized-Rake (G-Rake) receiver design uses decoder feedback in forming Rake combining weights as well as in forming a self-interference estimate removed from the equalizer signal provided to the decoder. Preferably, turbo de-coding is also performed. In that case, each turbo-decoder component preferably executes one pass before feeding back information to the equalizer. This ensures that the turbo-decoder does not prematurely lock onto an incorrect code word before feeding back extrinsic information to the equalizer.

Abstract translation: 用于CDMA接收机的线性turbo均衡器使解扩展的接收信号（而不是扩展接收信号）均衡，以抑制由传输符号之间的耦合产生的自干扰。 在示例实现中，基于广义Rake（G-Rake）接收机设计的线性均衡器在形成Rake组合权重时使用解码器反馈，以及形成从提供给解码器的均衡器信号中去除的自干扰估计。 优选地，还执行turbo解码。 在这种情况下，每个turbo解码器组件优选地在将信息反馈给均衡器之前执行一次通过。 这确保了在将外部信息反馈给均衡器之前，turbo解码器不会过早地锁定到不正确的代码字。

公开(公告)号：US07599702B2

公开(公告)日：2009-10-06

申请号：US10745051

申请日：2003-12-23

Applicant: Karl James Molnar ,  Stephen James Grant ,  Leonid Krasny

Inventor： Karl James Molnar ,  Stephen James Grant ,  Leonid Krasny

IPC: H04W40/00

CPC classification number: H04W72/1231 ,  H04B2201/709727 ,  H04L1/20 ,  H04L5/0044 ,  H04L5/006 ,  H04W52/16 ,  H04W52/226 ,  H04W52/325 ,  H04W52/367

Abstract: A base station schedules one of a plurality of mobile terminals based on an expected SIR of an effective traffic channel associated with a non-scheduled mobile terminal. The expected SIR is generated by computing the expected SIR of a hypothesized traffic channel with a pre-filter adapted to the non-scheduled mobile terminal that would result if the non-scheduled mobile terminal was scheduled. A base station then schedules transmissions to the plurality of mobile terminals based on the computed expected SIR. The expected SIR may be computed so as to compensate for mismatch between the hypothesized traffic channel and a pilot channel associated with the non-scheduled mobile terminal. Alternatively, the expected SIR may be directly computed based on an estimate of the pre-filter of the hypothesized traffic channel.

Abstract translation: 基站基于与非调度移动终端相关联的有效业务信道的期望SIR来调度多个移动终端中的一个。 通过利用适配于非调度移动终端的预滤波器来计算假设的业务信道的预期SIR来产生预期的SIR，如果非调度移动终端被调度，则将产生。 基站然后基于所计算的预期SIR调度到多个移动终端的传输。 可以计算期望的SIR，以补偿假设业务信道与与非调度移动终端相关联的导频信道之间的失配。 或者，可以基于假设的业务信道的前置过滤器的估计来直接计算预期的SIR。

公开(公告)号：US20090213945A1

公开(公告)日：2009-08-27

申请号：US12036337

申请日：2008-02-25

Applicant: Douglas A. Cairns ,  Stephen J. Grant

Inventor： Douglas A. Cairns ,  Stephen J. Grant

IPC: H04L27/28

CPC classification number: H04L25/03898 ,  H04B1/712 ,  H04B7/0413 ,  H04B7/0619 ,  H04B17/21 ,  H04B17/336 ,  H04B2201/70707 ,  H04B2201/709727

Abstract: A model-based technique for estimating impairment covariance associated with a MIMO signal is disclosed. In an exemplary method, an impairment model is constructed for a received composite information signal comprising at least a first data stream transmitted from first and second antennas according to a first antenna weighting vector. The impairment model includes first and second model terms corresponding to the first and second antennas, respectively, but in several embodiments does not include a cross-antenna interference term. In another embodiment, an impairment model for a received MIMO signal is constructed by computing an impairment model term for each antenna and an additional term to account for preceding interference in a single-stream MIMO transmission scenario. The impairment terms are grouped so that only two associated scaling terms are unknown; values for the scaling terms are estimated by fitting the model to measured impairment covariance values.

Abstract translation: 公开了一种用于估计与MIMO信号相关的损害协方差的基于模型的技术。 在一个示例性方法中，针对接收的复合信息信号构建损伤模型，所述复合信息信号包括根据第一天线加权向量从第一和第二天线发送的至少第一数据流。 损伤模型分别包括对应于第一和第二天线的第一和第二模型项，但是在几个实施例中不包括横向天线干扰项。 在另一个实施例中，通过计算每个天线的损伤模型项和用于考虑单流MIMO传输场景中的预编码干扰的附加项来构造用于所接收的MIMO信号的损伤模型。 损害条款被分组，使得只有两个相关联的缩放术语是未知的; 通过将模型拟合到测量的损害协方差值来估计缩放术语的值。

公开(公告)号：US20090202005A1

公开(公告)日：2009-08-13

申请号：US12027492

申请日：2008-02-07

Applicant: Douglas A. Cairns

Inventor： Douglas A. Cairns

IPC: H04L27/28 ,  H03K9/00

CPC classification number: H04L25/0246 ,  H04B1/71052 ,  H04B1/712 ,  H04B2201/70701 ,  H04B2201/709727 ,  H04L25/0224

Abstract: Teachings presented herein present a “whitening” channel estimation method and apparatus that produce high-quality net channel estimates for processing a received signal, such as a received CDMA signal. Processing includes forming an initial least squares problem (for medium channel estimates) using known pilot values and corresponding pilot observations for the received signal, transforming the initial least squares problem using a whitening transformation term, and solving the transformed least squares problem to obtain whitened medium channel estimates. The whitening transformation term may be determined, for example, by carrying out a Cholesky factorization of a (traffic) data correlation matrix, which can be obtained from traffic data values for the received signal. Processing further includes converting the whitened medium channel estimates into whitened net channel estimates, which consider the effects of transmit/receive filtering.

Abstract translation: 本文提出的教导提供了一种“白化”信道估计方法和装置，其产生用于处理诸如接收的CDMA信号的接收信号的高质量净信道估计。 处理包括使用已知导频值和接收信号的相应导频观测形成初始最小二乘问题（对于中等信道估计），使用白化变换项变换初始最小二乘问题，并求解变换最小二乘问题以获得白化介质 渠道估计。 白化变换项可以例如通过执行可以从接收信号的业务数据值获得的（业务）数据相关矩阵的Cholesky分解来确定。 处理进一步包括将白化的介质信道估计转换为白化净信道估计，其考虑发射/接收滤波的影响。

公开(公告)号：US20090116455A1

公开(公告)日：2009-05-07

申请号：US11935840

申请日：2007-11-06

Applicant: Gregory E. Bottomley ,  Douglas A. Cairns ,  Yi-Pin Eric Wang

Inventor： Gregory E. Bottomley ,  Douglas A. Cairns ,  Yi-Pin Eric Wang

IPC: H04B7/216

CPC classification number: H04B1/7103 ,  H04B1/712 ,  H04B2201/709727

Abstract: As taught herein channelization code power estimates are generated for a number of data channels in a received CDMA signal based on a joint determination process. Joint processing in this context yields improved estimation of data channel code powers and corresponding estimations of noise variance. These improvements arise from exploitation of joint processing of measured data value correlations across two or more data channel codes represented in the received signal. In one or more embodiments, joint determination of data channel code powers comprises forming a correlation matrix as a weighted average of correlations determined for a plurality of data channels. In one or more other embodiments, joint determination of data channel code powers comprises jointly fitting the correlation matrices for a plurality of data channels in a least squares error estimation process.

Abstract translation: 如本文所教导的，基于联合确定过程，对接收的CDMA信号中的多个数据信道生成信道化码功率估计。 在这种情况下的联合处理可以改善数据信道码功率的估计和噪声方差的相应估计。 这些改进是由于在接收到的信号中表示的两个或多个数据信道代码之间对测量的数据值相关性的联合处理的利用。 在一个或多个实施例中，数据信道码功率的联合确定包括形成相关矩阵作为为多个数据信道确定的相关性的加权平均值。 在一个或多个其他实施例中，数据信道码功率的联合确定包括在最小二乘误差估计过程中共同拟合多个数据信道的相关矩阵。

公开(公告)号：US20090069042A1

公开(公告)日：2009-03-12

申请号：US12044185

申请日：2008-03-07

Applicant: Xiaohui Wang ,  Jonas Ohlsson ,  Magnus Ost

Inventor： Xiaohui Wang ,  Jonas Ohlsson ,  Magnus Ost

IPC: H04B7/005

CPC classification number: H04W52/12 ,  H04B2201/709727 ,  H04W52/20 ,  H04W52/241

Abstract: Outer-loop power control methods and apparatus are disclosed. In an exemplary embodiment, a short-term block error rate is measured for a received signal, and a coarse adjustment to a target signal-to-interference ratio (SIR) is calculated as a function of the short-term block error rate, a target block error rate, and a first loop tuning parameter. In some embodiments, a fine adjustment to the target SIR is also calculated, as a function of a smoothed block error rate, the target block error rate, and a second loop tuning parameter. The coarse adjustment provides quick responsiveness to received block errors, while the fine adjustment moderates the coarse adjustments by accounting for a longer-term view of the received block error rate. The target SIR adjustments disclosed herein may be computed in each of several iterations of an outer-loop power control loop.

Abstract translation: 公开了外环功率控制方法和装置。 在示例性实施例中，针对接收信号测量短期块错误率，并且根据短期块错误率计算对目标信号干扰比（SIR）的粗略调整， 目标块错误率和第一个循环调整参数。 在一些实施例中，还根据平滑的块错误率，目标块错误率和第二环路调整参数来计算对目标SIR的精细调整。 粗略调整提供对接收到的块错误的快速响应，而微调通过考虑接收到的块错误率的长期视图来缓和粗调。 可以在外环功率控制回路的几次迭代中的每一个中计算本文公开的目标SIR调整。

公开(公告)号：US20080304600A1

公开(公告)日：2008-12-11

申请号：US11969692

申请日：2008-01-04

Applicant: Gregory E. BOTTOMLEY

Inventor： Gregory E. BOTTOMLEY

IPC: H04L27/06 ,  H03D1/00

CPC classification number: H04B7/0854 ,  H04B1/71052 ,  H04B1/712 ,  H04B2201/709727 ,  H04L25/0204 ,  H04L25/0212 ,  H04L25/0244

Abstract: A device that estimates information from a signal includes a receiver for receiving an input signal and electronic processing circuitry. The electronic processing circuitry generates a matrix associated with the input signal and determines an approximation of an inverse of the matrix based on the adjoint of the matrix and a scaling factor associated with the determinant of the matrix. This approximation avoids possible mathematical difficulties that may be encountered in certain situations when a typical matrix inversion is calculated. The approximated inverse matrix is applied to the input signal to transform the input signal into an output signal. Information associated with the input signal is then determined based on the output signal.

Abstract translation: 从信号估计信息的装置包括用于接收输入信号的接收器和电子处理电路。 电子处理电路产生与输入信号相关联的矩阵，并且基于矩阵的伴随和与矩阵的行列式相关联的缩放因子来确定矩阵的逆的近似。 这种近似避免了在计算典型矩阵反演时在某些情况下可能遇到的可能的数学困难。 将近似的逆矩阵施加到输入信号以将输入信号变换为输出信号。 然后基于输出信号确定与输入信号相关联的信息。