公开(公告)号：US20090213909A1

公开(公告)日：2009-08-27

申请号：US12036368

申请日：2008-02-25

Applicant: Stephen J. Grant ,  Douglas A. Cairns

Inventor： Stephen J. Grant ,  Douglas A. Cairns

IPC: H04B1/707 ,  H04B17/00

CPC classification number: H04B7/0426 ,  H04B1/712 ,  H04B2201/709727

Abstract: Methods and apparatus for estimating code-reuse interference associated with a received multi-stream multiple-input multiple-output (MIMO) signal are disclosed. An estimate for the data-to-pilot power ratio, ΓD/P, may be obtained as a by-product of parametric estimation of impairment covariance associated with the received MIMO signal. In an exemplary method, a parametric impairment model is constructed for a received MIMO signal, the parametric model omitting code-reuse interference. Impairment covariance is measured, using, in one or more embodiments, received pilot symbol data. The parametric impairment model is fitted to the measured impairment covariance to obtain one or more scaling parameter values. A per-code energy value for a first data stream is then calculated from the one or more scaling parameter values. In some embodiments, the data-to-pilot power ratio for the received signal is first calculated from the one or more scaling parameters, and the per-code energy value calculated from the data-to-pilot power ratio.

Abstract translation: 公开了用于估计与接收的多流多输入多输出（MIMO）信号相关联的代码重用干扰的方法和装置。 可以获得数据导频功率比GammaD / P的估计，作为与接收的MIMO信号相关联的损害协方差的参数估计的副产品。 在示例性方法中，为接收的MIMO信号构建参数化损伤模型，该参数模型省略了码重用干扰。 在一个或多个实施例中，使用接收的导频符号数据来测量损伤协方差。 参数化损伤模型适用于测量的损害协方差，以获得一个或多个缩放参数值。 然后从一个或多个缩放参数值计算第一数据流的每码能量值。 在一些实施例中，首先从一个或多个缩放参数和从数据导频功率比计算出的每码能量值来计算接收信号的数据导频功率比。

公开(公告)号：US07558533B2

公开(公告)日：2009-07-07

申请号：US11936193

申请日：2007-11-07

Applicant: Carmela Cozzo ,  Gregory Bottomley ,  Rajaram Ramesh

Inventor： Carmela Cozzo ,  Gregory Bottomley ,  Rajaram Ramesh

IPC: H04B15/00

CPC classification number: H04B1/712 ,  H04B1/7117 ,  H04B2201/709727

Abstract: A receiver is described herein that is capable of receiving and processing a radio signal and further capable of using interpolation to initialize receiver parameters when there is a change in at least one delay associated with the received radio signal or when there is at least one new correlator position. For instance, the receiver parameters that can be initialized include: (1) channel coefficients; (2) AFC parameters; (3) tracking parameters; (4) noise statistics (noise correlations); (5) signal statistics (channel coefficient correlations); (6) data statistics (despread values or chip samples); or (7) combining weights.

Abstract translation: 本文描述了一种接收机，其能够接收和处理无线电信号，并且还能够在存在与所接收的无线电信号相关联的至少一个延迟中的变化时或者当存在至少一个新的相关器时使用内插来初始化接收机参数 位置。 例如，可以初始化的接收机参数包括：（1）信道系数; （2）AFC参数; （3）跟踪参数; （4）噪声统计（噪声相关）; （5）信号统计（信道系数相关）; （6）数据统计（去扩展值或芯片样本）; 或（7）组合权重。

公开(公告)号：US20090154531A1

公开(公告)日：2009-06-18

申请号：US11954460

申请日：2007-12-12

Applicant: Tracy L. Fulghum

Inventor： Tracy L. Fulghum

IPC: H04B1/707

CPC classification number: H04B1/712 ,  H04B1/711 ,  H04B2201/709727

Abstract: In a parametric G-Rake receiver, a method an apparatus computes initial estimates of one or more scaling parameters and initial combining weights for the parametric G-Rake receiver; estimates the SINR of a received signal based on a mean pilot symbol estimate and the initial combining weights; computes revised estimates for one or more scaling parameters based on the estimated SINR and the initial combining weights; and computes revised combining weights based on one or more revised scaling parameter estimates.

Abstract translation: 在参数G-Rake接收机中，方法和装置计算参数G-Rake接收机的一个或多个缩放参数和初始组合权重的初始估计; 基于平均导频符号估计和初始组合权重来估计接收信号的SINR; 基于估计的SINR和初始组合权重计算一个或多个缩放参数的修正估计; 并且基于一个或多个修正的缩放参数估计来计算修改的组合权重。

公开(公告)号：US07539240B2

公开(公告)日：2009-05-26

申请号：US10800167

申请日：2004-03-12

Applicant: Douglas A. Cairns ,  Gregory E. Bottomley ,  Yi-Pin Eric Wang ,  Tracy L. Fulghum ,  Elias Jonsson

Inventor： Douglas A. Cairns ,  Gregory E. Bottomley ,  Yi-Pin Eric Wang ,  Tracy L. Fulghum ,  Elias Jonsson

IPC: H04B15/00

CPC classification number: H04B1/712 ,  H04B2201/709727

Abstract: Exemplary received signal processing may be based on maintaining a model of received signal impairment correlations, wherein each term of the model is updated periodically or as needed based on measuring impairments for a received signal of interest. An exemplary model comprises an interference impairment term scaled by a first model fitting parameter, and a noise impairment term scaled by a second model fitting parameters. The model terms may be maintained based on current channel estimates and delay information and may be fitted to measured impairment by adapting the model fitting parameters based on the measured impairment. The modeled received signal impairment correlations may be used to compute RAKE combining weights for received signal processing, or to compute Signal-to-Interference (SIR) estimates. Combined or separate models may be used for multiple received signals. As such, the exemplary modeling is extended to soft handoff, multiple antennas, and other diversity situations.

Abstract translation: 示例性的接收信号处理可以基于维持接收信号损害相关的模型，其中基于感兴趣的接收信号的测量损伤，模型的每个项被周期性地或根据需要更新。 示例性模型包括由第一模型拟合参数缩放的干扰损害项和由第二模型拟合参数缩放的噪声损伤项。 模型条款可以根据当前的渠道估计和延迟信息进行维护，并且可以通过根据测量的损失调整模型拟合参数来适应测量的损益。 建模的接收信号损害相关可用于计算接收信号处理的RAKE组合权重，或用于计算信号与干扰（SIR）估计。 组合或分离的模型可用于多个接收信号。 因此，示例性建模被扩展到软切换，多个天线和其他分集情况。

公开(公告)号：US20090041163A1

公开(公告)日：2009-02-12

申请号：US12065508

申请日：2006-08-31

Applicant: Elias Jonsson ,  Marten Myrehed

Inventor： Elias Jonsson ,  Marten Myrehed

IPC: H04L27/06

CPC classification number: H04B1/7113 ,  H04B1/7117 ,  H04B2201/70702 ,  H04B2201/70707 ,  H04B2201/709727

Abstract: Multipath components of transmitted data symbols are received with individual delays and processed by a RAKE having a number of fingers. A delay profile indicating magnitudes for a first number of delay values is provided. Estimated magnitudes for a second number of delay values located between the first number of delay values are calculated by interpolation, and a combined delay profile is provided by combining the magnitudes for the first and second number of delay values. Delay values for peaks in the combined delay profile are determined, and a number of peak delay values (P1, P2, P) comprising the largest peak are selected from the combined delay profile. At least some of the selected peak delay values are provided to the RAKE and assigned to the fingers. This allows a reduction of current consumption and dye area, while still providing delay values with sufficient resolution for the RAKE.

Abstract translation: 所传输的数据符号的多路径分量被接收具有单独的延迟并由具有多个指状物的RAKE处理。 提供了指示第一数量的延迟值的幅度的延迟分布。 通过内插计算位于第一数量的延迟值之间的第二数量的延迟值的估计幅度，并且通过组合第一和第二数量的延迟值的幅度来提供组合的延迟分布。 确定组合延迟分布中的峰值的延迟值，并从组合的延迟分布中选择包括最大峰值的峰值延迟值（P1，P2，P）的数目。 所选择的峰值延迟值中的至少一些被提供给RAKE并被分配给手指。 这允许减少电流消耗和染色面积，同时仍然为RAKE提供足够的分辨率的延迟值。

公开(公告)号：US20090034666A1

公开(公告)日：2009-02-05

申请号：US11832695

申请日：2007-08-02

Applicant: Bengt Lindoff ,  Andres Reial

Inventor： Bengt Lindoff ,  Andres Reial

IPC: H04B1/10

CPC classification number: H04B1/707 ,  H04B1/123 ,  H04B1/30 ,  H04B2201/709727 ,  H04L25/0212 ,  H04L27/3863 ,  H04L2027/0016

Abstract: A WCDMA receiver performs baseband suppression of the image signal component caused by IQ imbalance. An IQ imbalance image scaling factor is computed from conventional channel estimates and estimates of the IQ imbalance image channel, the latter computed using a conjugated scrambling sequence as the reference sequence for despreading. An IQ imbalance image estimate is obtained by scaling the complex conjugate of the received signal by the IQ imbalance image scaling factor, and is subtracted from the input signal prior to applying traditional baseband demodulation algorithms.

Abstract translation: WCDMA接收机对IQ不平衡引起的图像信号分量进行基带抑制。 从常规信道估计和IQ不平衡图像信道的估计计算IQ不平衡图像缩放因子，后者使用共轭加扰序列作为解扩的参考序列计算。 通过将接收信号的复共轭缩放IQ平衡图像缩放因子，获得IQ不平衡图像估计，并且在应用传统的基带解调算法之前从输入信号中减去IQ不平衡图像估计。

公开(公告)号：US20090023437A1

公开(公告)日：2009-01-22

申请号：US12138655

申请日：2008-06-13

Applicant: Douglas A. CAIRNS ,  Yi-Pin Eric WANG ,  Hakan Bjorkegren

Inventor： Douglas A. CAIRNS ,  Yi-Pin Eric WANG ,  Hakan Bjorkegren

IPC: H04W4/00

CPC classification number: H04L25/0242 ,  H04B1/71052 ,  H04B1/712 ,  H04B2201/709727 ,  H04L25/0208

Abstract: The technology comprises method(s) and apparatus for operating a telecommunications system. In its basic form the method comprises providing plural channelization codes for potential use by an uplink receiver; using unused channelization codes of the plural codes to generate an estimate of an impairment covariance matrix; and using the estimate of the impairment covariance matrix to form a processing parameter. For example, the processing parameter can be one or more weight values which, in turn, are can be used for generating a combined output signal.

Abstract translation: 该技术包括用于操作电信系统的方法和装置。 在其基本形式中，该方法包括提供用于上行链路接收机的潜在用途的多个信道化码; 使用所述多个代码的未使用的信道化码来生成损害协方差矩阵的估计; 并使用损伤协方差矩阵的估计来形成处理参数。 例如，处理参数可以是一个或多个加权值，其又可以用于产生组合的输出信号。

公开(公告)号：US20090003415A1

公开(公告)日：2009-01-01

申请号：US11957487

申请日：2007-12-17

Applicant: Chen-Zong Bai ,  Hsueh-Jyh Li ,  Po-Ying Chen

Inventor： Chen-Zong Bai ,  Hsueh-Jyh Li ,  Po-Ying Chen

IPC: H04B1/707

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

Abstract: The invention relates to a rake receiver and a method for de-spreading thereof. A plurality of noise branches is adopted for producing a plurality of noise components in the rake receiver. Next, a noise combining unit adjusts each noise component according to a plurality of noise weights, so as to combine the noise components to obtain an interference-plus-noise estimation value. The rake receiver eliminates the noises in the main signal generated by the signal branches through using the interference-plus-noise estimation value. Therefore, the performance of a receiving terminal can be enhanced.

Abstract translation: 本发明涉及一种耙式接收机及其解扩方法。 采用多个噪声分支来在耙式接收机中产生多个噪声分量。 接下来，噪声组合单元根据多个噪声权重来调整每个噪声分量，以便组合噪声分量以获得干扰加噪声估计值。 耙式接收器通过使用干扰加噪声估计值消除由信号分支产生的主信号中的噪声。 因此，可以提高接收终端的性能。

公开(公告)号：US20080304586A1

公开(公告)日：2008-12-11

申请号：US11760285

申请日：2007-06-08

Applicant: Karl Molnar

Inventor： Karl Molnar

IPC: H04K1/10 ,  H03D1/06

CPC classification number: H04L25/0212 ,  H04B1/7105 ,  H04B1/7115 ,  H04B2201/709727 ,  H04L25/0204

Abstract: RAKE-based receivers utilize lattice reduction for improving symbol estimation accuracy. Channel response estimates and received signal streams are transformed from a constellation lattice basis to an integer lattice basis to increase the orthogonality of symbol estimation decision regions. In one embodiment, received signal streams are processed by generating despread signal samples from received signal streams transmitted using different spreading codes. Channel response associated with the different received signal streams is estimated and transformed from a first lattice basis to a second lattice basis having greater orthogonality between decision regions than the first lattice basis. The despread signal samples are aligned to the second lattice and combining weights generated based on the transformed channel response estimate. Symbol estimation decision statistics are generated based on the combining weights and the aligned despread signal samples. Soft bit values are generated for decoding based on the symbol estimation decision statistics.

Abstract translation: 基于RAKE的接收机利用晶格简化来提高符号估计精度。 信道响应估计和接收信号流从星座晶格转换为整数格基，以增加符号估计决定区域的正交性。 在一个实施例中，通过从使用不同扩展码发送的接收信号流中产生解扩信号样本来处理接收信号流。 与不同的接收信号流相关联的信道响应被估计并从第一格子基变换到具有比第一格子基的判定区之间更大的正交性的第二格基。 解扩信号样本与第二晶格对准，并且基于经变换的信道响应估计产生的组合权重。 基于组合权重和对准的解扩展信号样本生成符号估计判定统计量。 生成用于基于符号估计判定统计的解码的软比特值。

公开(公告)号：US20080291978A1

公开(公告)日：2008-11-27

申请号：US11751109

申请日：2007-05-21

Applicant: Elias Jonsson ,  Yi-Pin Eric Wang ,  Gregory E. Bottomley ,  Stephen J. Grant

Inventor： Elias Jonsson ,  Yi-Pin Eric Wang ,  Gregory E. Bottomley ,  Stephen J. Grant

IPC: H04B1/76 ,  H04B1/69

CPC classification number: H04B1/712 ,  H04B7/0634 ,  H04B2201/709727

Abstract: A parametric form of G-Rake and chip equalization for closed-loop transmit diversity is provided, that accounts for impairment correlation between transmit antennas. In a closed-loop transmit diversity system, the base station transmits a signal from two or more antennas, using one of a predetermined set of relative phase offsets at one of the antennas. The parametric estimation of the impairment or data covariance is performed by summing terms, including a term for each possible phase offset. The terms are weighted by fitting parameters. The fitting parameters are jointly solved by fitting the impairment or data covariance estimate to a measured impairment or data covariance. In another aspect, a measured impairment covariance is formed by exploiting a special relationship between the pilot channels of the different transmit antennas.

Abstract translation: 提供了用于闭环发射分集的G-Rake和码片均衡的参数形式，其考虑了发射天线之间的损害相关性。 在闭环发射分集系统中，基站使用在天线之一处的预定相对相位偏移集合中的一个从两个或多个天线发射信号。 损伤或数据协方差的参数估计是通过求和术语来执行的，包括每个可能的相位偏移的项。 这些术语通过拟合参数加权。 拟合参数通过将损伤或数据协方差估计拟合为测量的损伤或数据协方差来共同解决。 在另一方面，通过利用不同发射天线的导频信道之间的特殊关系来形成测量的损害协方差。