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1.发明授权公开(公告)号：US07539240B2
公开(公告)日：2009-05-26
申请号：US10800167
申请日：2004-03-12
IPC分类号： H04B15/00
CPC分类号： H04B1/712 , H04B2201/709727
摘要： 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.
摘要翻译： 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。
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2.发明申请Method and Apparatus for Efficient Estimation of Interference in a Wireless Receiver 有权无线接收机干扰有效估计的方法和装置公开(公告)号：US20090304132A1
公开(公告)日：2009-12-10
申请号：US12133636
申请日：2008-06-05
申请人： Douglas A. Cairns , Gregory E. Bottomley , Andreas Cedergren , Tracy L. Fulghum , Elias Jonsson
发明人： Douglas A. Cairns , Gregory E. Bottomley , Andreas Cedergren , Tracy L. Fulghum , Elias Jonsson
IPC分类号： H04B7/10
CPC分类号： H04B1/7117 , H04B1/712
摘要： 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.
摘要翻译： 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。
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3.发明授权Method and apparatus for efficient estimation of interference in a wireless receiver 有权用于有效估计无线接收机中的干扰的方法和装置公开(公告)号：US08295417B2
公开(公告)日：2012-10-23
申请号：US12133636
申请日：2008-06-05
申请人： Douglas A. Cairns , Gregory E. Bottomley , Andreas Cedergren , Tracy L. Fulghum , Elias Jonsson
发明人： Douglas A. Cairns , Gregory E. Bottomley , Andreas Cedergren , Tracy L. Fulghum , Elias Jonsson
IPC分类号： H04B7/10
CPC分类号： H04B1/7117 , H04B1/712
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US08964912B2
公开(公告)日：2015-02-24
申请号：US11219183
申请日：2005-09-02
IPC分类号： H04B1/10 , H04B1/712 , H04B1/7117
CPC分类号： H04B1/712 , H04B1/7117 , H04B2201/709727
摘要： A method and apparatus for determining operating modes in a receiver is described herein. A delay searcher in the receiver detects a signal image in the received signal. When the receiver is a RAKE receiver, a plurality of RAKE fingers coherently combine time-shifted versions of the received signal at different delays. Alternatively, when the receiver is a chip equalization receiver, an FIR filter coherently pre-combines the signal images in the received signal. A processor determines delays. In particular, the processor generates a first signal quality metric for a single-delay receiver mode, and generates a second signal quality metric for a multi-delay receiver mode. Based on a comparison of the first and second signal quality metrics, the processor selects the single-delay or the multi-delay receiver mode for processing the signal image.
摘要翻译： 本文描述了用于确定接收机中的操作模式的方法和装置。 接收机中的延迟搜索器检测接收信号中的信号图像。 当接收机是RAKE接收机时，多个RAKE指头以不同的延迟相干地组合接收信号的时移版本。 或者，当接收机是芯片均衡接收机时，FIR滤波器相干地预组合接收信号中的信号图像。 处理器确定延迟。 特别地，处理器为单延迟接收器模式产生第一信号质量度量，并且产生用于多延迟接收器模式的第二信号质量度量。 基于第一和第二信号质量度量的比较，处理器选择用于处理信号图像的单延迟或多延迟接收器模式。
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5.发明申请Method and Apparatus for Code Power Parameter Estimation for Received Signal Processing 有权用于接收信号处理的码功率参数估计的方法和装置公开(公告)号：US20090116455A1
公开(公告)日：2009-05-07
申请号：US11935840
申请日：2007-11-06
IPC分类号： H04B7/216
CPC分类号： H04B1/7103 , H04B1/712 , H04B2201/709727
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US07920619B2
公开(公告)日：2011-04-05
申请号：US11739924
申请日：2007-04-25
IPC分类号： H04B1/00
CPC分类号： H04L25/024 , H04B1/7105 , H04B2201/709727
摘要： A method and apparatus for reducing the complexity of waveform correlation computations used by a multicode receiver is described herein. One exemplary multicode receiver includes a despreading unit, channel estimator, and waveform correlation calculator. The despreading unit despreads a received multicode signal to generate despread symbols. The channel estimator estimates channel coefficients associated with the despread symbols. The waveform correlation calculator determines waveform correlations between the transmitted symbols in successive processing windows that span two or more symbol periods and that overlap in time. To reduce the computational complexity associated with computing waveform correlations, the calculator may reuse channel coefficients and/or net channel correlations for multiple symbol periods and/or processing windows. The calculator may also reduce complexity by reusing one or more waveform correlations from a previous processing window as waveform correlations for one or more subsequent processing windows and/or by exploiting the Hermitian symmetry of the waveform correlation matrix.
摘要翻译： 这里描述了一种降低多码接收机使用的波形相关计算的复杂度的方法和装置。 一个示例性多码接收机包括解扩单元，信道估计器和波形相关计算器。 解扩单元对接收到的多码信号进行解扩，以产生解扩符号。 信道估计器估计与解扩符号相关联的信道系数。 波形相关计算器确定跨越两个或多个符号周期并且在时间上重叠的连续处理窗口中的发送符号之间的波形相关性。 为了减少与计算波形相关性相关联的计算复杂度，计算器可以重用多个符号周期和/或处理窗口的信道系数和/或净信道相关性。 计算器还可以通过将来自先前处理窗口的一个或多个波形相关作为一个或多个后续处理窗口的波形相关性和/或通过利用波形相关矩阵的埃米特对称来重新降低复杂度。
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公开(公告)号：US20080267261A1
公开(公告)日：2008-10-30
申请号：US11739924
申请日：2007-04-25
IPC分类号： H04B1/69
CPC分类号： H04L25/024 , H04B1/7105 , H04B2201/709727
摘要： A method and apparatus for reducing the complexity of waveform correlation computations used by a multicode receiver is described herein. One exemplary multicode receiver includes a despreading unit, channel estimator, and waveform correlation calculator. The despreading unit despreads a received multicode signal to generate despread symbols. The channel estimator estimates channel coefficients associated with the despread symbols. The waveform correlation calculator determines waveform correlations between the transmitted symbols in successive processing windows that span two or more symbol periods and that overlap in time. To reduce the computational complexity associated with computing waveform correlations, the calculator may reuse channel coefficients and/or net channel correlations for multiple symbol periods and/or processing windows. The calculator may also reduce complexity by reusing one or more waveform correlations from a previous processing window as waveform correlations for one or more subsequent processing windows and/or by exploiting the Hermitian symmetry of the waveform correlation matrix.
摘要翻译： 这里描述了一种降低多码接收机使用的波形相关计算的复杂度的方法和装置。 一个示例性多码接收机包括解扩单元，信道估计器和波形相关计算器。 解扩单元对接收到的多码信号进行解扩，以产生解扩符号。 信道估计器估计与解扩符号相关联的信道系数。 波形相关计算器确定跨越两个或多个符号周期并且在时间上重叠的连续处理窗口中的发送符号之间的波形相关性。 为了减少与计算波形相关性相关联的计算复杂度，计算器可以重用多个符号周期和/或处理窗口的信道系数和/或净信道相关性。 计算器还可以通过将来自先前处理窗口的一个或多个波形相关作为一个或多个后续处理窗口的波形相关性和/或通过利用波形相关矩阵的埃米特对称来重新降低复杂度。
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8.发明授权Method and apparatus for code power parameter estimation for received signal processing 有权用于接收信号处理的码功率参数估计方法和装置公开(公告)号：US07995641B2
公开(公告)日：2011-08-09
申请号：US11935840
申请日：2007-11-06
IPC分类号： H04B1/00
CPC分类号： H04B1/7103 , H04B1/712 , H04B2201/709727
摘要： 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.
摘要翻译： 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。
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9.发明授权Method and apparatus for extended least squares estimation for generalized rake receiver parameters using multiple base stations 有权用于使用多个基站的广义耙式接收机参数的扩展最小二乘估计的方法和装置公开(公告)号：US08040938B2
公开(公告)日：2011-10-18
申请号：US11609373
申请日：2006-12-12
IPC分类号： H04B1/00
CPC分类号： H04B1/712 , H04B2201/709727
摘要： Exemplary combining weight generation is based on estimating received signal impairment correlations using a weighted summation of interference impairment terms, such as an interference correlation matrix associated with a transmitting base station, and a noise impairment term, such as a noise correlation matrix, the impairment terms scaled by fitting parameters. The estimate is updated based on adapting the fitting parameters responsive to measured signal impairment correlations. The interference matrices are calculated from channel estimates and delay information, and knowledge of the receive filter pulse shape. Instantaneous values of the fitting parameters are determined by fitting the impairment correlation terms to impairment correlations measured at successive time instants and the fitting parameters are adapted at each time instant by updating the fitting parameters based on the instantaneous values.
摘要翻译： 示例性组合权重生成是基于使用干扰损害项的加权求和来估计接收到的信号损害相关性，例如与发射基站相关联的干扰相关矩阵，以及诸如噪声相关矩阵之类的噪声损害项，损伤项 通过拟合参数进行缩放。 基于对测量的信号损伤相关性的适应参数进行修改，估计更新。 干扰矩阵由信道估计和延迟信息以及接收滤波器脉冲形状的知识计算。 拟合参数的瞬时值通过将损害相关项拟合到在连续时刻测量的损伤相关性来确定，并且通过基于瞬时值更新拟合参数，在每个时刻适应拟合参数。
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公开(公告)号：US07873098B2
公开(公告)日：2011-01-18
申请号：US11739126
申请日：2007-04-24
IPC分类号： H04B1/00
CPC分类号： H04B1/71055 , H04B1/7107 , H04B2201/709727
摘要： Detecting a symbol of interest comprises despreading a received signal to obtain despread values corresponding to the symbol of interest and to one or more interfering symbols, combining the despread values to generate combined values for the symbol of interest and the interfering symbols, computing spreading waveform correlations between the spreading waveform for the symbol of interest and the spreading waveforms for the interfering symbols, computing interference rejection terms representing the interference present in the combined value for the symbol of interest attributable to the interfering symbols based on the spreading waveform correlations, and generating an estimate of the symbol of interest by combining the combined values with the interference rejection terms. The interference rejection terms are computed by scaling the spreading waveform correlations by corresponding signal powers and compensating the estimates for noise. This provides a robust interference model that avoids numerical problems associated with conventional joint detection.
摘要翻译： 检测感兴趣的符号包括解扩接收信号以获得对应于感兴趣符号的解扩值和一个或多个干扰符号，组合解扩值以产生感兴趣符号和干扰符号的组合值，计算扩展波形相关性 在感兴趣符号的扩展波形和干扰符号的扩展波形之间，基于扩展波形相关性计算代表归因于干扰符号的感兴趣符号的组合值中存在的干扰的干扰抑制项， 通过将组合值与干扰抑制项组合来估计感兴趣的符号。 通过相应的信号功率缩放扩展波形相关性并补偿噪声的估计来计算干扰抑制项。 这提供了一个强大的干扰模型，可以避免与常规关节检测相关的数值问题。
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