公开(公告)号：US08428106B2

公开(公告)日：2013-04-23

申请号：US12138655

申请日：2008-06-13

申请人： Douglas A. Cairns ,  Yi-Pin Eric Wang ,  Håkan Bjorkegen

发明人： Douglas A. Cairns ,  Yi-Pin Eric Wang ,  Håkan Bjorkegen

IPC分类号： H04B1/00

CPC分类号： H04L25/0242 ,  H04B1/71052 ,  H04B1/712 ,  H04B2201/709727 ,  H04L25/0208

摘要： 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.

摘要翻译： 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：US07957485B2

公开(公告)日：2011-06-07

申请号：US12036337

申请日：2008-02-25

申请人： Douglas A. Cairns ,  Stephen J. Grant

发明人： Douglas A. Cairns ,  Stephen J. Grant

IPC分类号： H04B7/02 ,  H04L1/02

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

摘要： 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.

摘要翻译： 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：US20110014874A1

公开(公告)日：2011-01-20

申请号：US12505139

申请日：2009-07-17

申请人： Douglas A. Cairns

发明人： Douglas A. Cairns

IPC分类号： H04B15/00

CPC分类号： H04B1/7115 ,  H04B1/712

摘要： Path delay information generated by a path searcher module of a wireless receiver is used to generate net channel coefficients for use in suppressing interference from a received signal. According to one embodiment, interference is suppressed from a signal transmitted over a communication channel including transmit and receive pulse shaping filters and a radio channel by generating net channel coefficients for the communication channel at processing delays such as G-Rake finger delays or chip equalizer tap delays. Medium channel coefficients are generated for the radio channel at estimated path delays as a function of the net channel coefficients. The net channel coefficients are regenerated at arbitrary delays as a function of the medium channel coefficients and an impairment covariance estimate is generated based at least in part on the regenerated net channel coefficients.

摘要翻译： 由无线接收机的路径搜索器模块产生的路径延迟信息用于产生用于抑制来自接收信号的干扰的净信道系数。 根据一个实施例，通过在包括发射和接收脉冲整形滤波器以及无线电信道的通信信道上发送的信号来抑制干扰，所述信号通过在处理延迟例如G-Rake手指延迟或码片均衡器抽头上产生通信信道的净通道系数 延误 作为净通道系数的函数，以估计的路径延迟为无线电信道生成中等信道系数。 净通道系数以任意延迟再生，作为介质通道系数的函数，并且至少部分地基于再生的净通道系数产生损害协方差估计。

公开(公告)号：US07711033B2

公开(公告)日：2010-05-04

申请号：US11105797

申请日：2005-04-14

申请人： Andres Reial ,  Douglas A. Cairns

发明人： Andres Reial ,  Douglas A. Cairns

IPC分类号： H04B1/00

CPC分类号： H04B17/309 ,  H04B2201/709727 ,  H04W52/223

摘要： The present invention provides a method and apparatus for generating SIR estimates early in a time interval that include the benefits of interference suppression without requiring the computation of specific interference suppression elements. In particular, the present invention generates an SIR estimate for a RAKE receiver during a current time interval based on channel estimates generated based on the received signal(s). By applying an offset derived during a previous time interval to the RAKE SIR estimate, the present invention generates a second SIR estimate for a G-RAKE receiver.

摘要翻译： 本发明提供了一种用于在包括干扰抑制的优点的时间间隔早期产生SIR估计的方法和装置，而不需要计算特定的干扰抑制元件。 特别地，本发明基于基于接收到的信号生成的信道估计，在当前时间间隔内产生RAKE接收机的SIR估计。 通过将在先前时间间隔中导出的偏移应用于RAKE SIR估计，本发明为G-RAKE接收机生成第二SIR估计。

公开(公告)号：US20090213945A1

公开(公告)日：2009-08-27

申请号：US12036337

申请日：2008-02-25

申请人： Douglas A. Cairns ,  Stephen J. Grant

发明人： Douglas A. Cairns ,  Stephen J. Grant

IPC分类号： H04L27/28

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

摘要： 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.

摘要翻译： 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

申请人： Douglas A. Cairns

发明人： Douglas A. Cairns

IPC分类号： H04L27/28 ,  H03K9/00

CPC分类号： H04L25/0246 ,  H04B1/71052 ,  H04B1/712 ,  H04B2201/70701 ,  H04B2201/709727 ,  H04L25/0224

摘要： 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.

摘要翻译： 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

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

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

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。

公开(公告)号：US08295329B2

公开(公告)日：2012-10-23

申请号：US11850837

申请日：2007-09-06

申请人： Douglas A. Cairns ,  Gregory E. Bottomley ,  Karl J. Molnar

发明人： Douglas A. Cairns ,  Gregory E. Bottomley ,  Karl J. Molnar

IPC分类号： H04B1/00

CPC分类号： H04B1/71055 ,  H04B1/7115 ,  H04B2201/709727

摘要： A symbol detector converts initial symbol estimates of received symbols to soft estimates for decoding. The symbol detector computes spreading waveform correlations between a spreading waveform for a symbol of interest and spreading waveforms for one or more interfering symbols. Interference rejection terms are computed by scaling the spreading waveform correlations by corresponding signal powers and compensating for noise. A soft scaling factor for the symbol of interest is computed from the interference rejection terms. The soft scaling factors are then applied to the initial symbol estimates to generate the soft estimates.

摘要翻译： 符号检测器将接收符号的初始符号估计转换为用于解码的软估计。 符号检测器计算感兴趣符号的扩展波形和一个或多个干扰符号的扩展波形之间的扩展波形相关性。 通过相应的信号功率缩放扩展波形相关性并补偿噪声来计算干扰抑制项。 根据干扰抑制项计算感兴趣符号的软缩放因子。 然后将软缩放因子应用于初始符号估计以产生软估计。

公开(公告)号：US07920619B2

公开(公告)日：2011-04-05

申请号：US11739924

申请日：2007-04-25

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

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

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。

公开(公告)号：US07848389B2

公开(公告)日：2010-12-07

申请号：US11219626

申请日：2005-09-02

申请人： Carmela Cozzo ,  Douglas A. Cairns ,  Gregory E. Bottomley ,  Ali S. Khayrallah ,  Håkan B. Eriksson

发明人： Carmela Cozzo ,  Douglas A. Cairns ,  Gregory E. Bottomley ,  Ali S. Khayrallah ,  Håkan B. Eriksson

IPC分类号： H04B1/69

CPC分类号： H04B1/7103 ,  H04B1/712 ,  H04B2201/709727 ,  H04L25/0212 ,  H04L25/0222 ,  H04L25/0228

摘要： A wireless communication receiver, such as the receiver included in a wireless communication transceiver implemented in a base station or in a mobile station of a wireless communication network, includes a parametric G-RAKE receiver circuit and a method that compute parametric scaling parameters on a per transmission interval basis. In one embodiment, measured impairment correlations are obtained for an individual transmission slot and used to estimate instantaneous values of the scaling parameters. One or both of those instantaneous values are then constrained according to one or more defined limits. In other embodiments, multiple transmission slots are used to increase the number of measurements available to estimate the scaling parameters, with parameter constraining optionally applied. Further embodiments use iterative methods and/or solve for one parameter, and use the results to obtain the other parameter(s). One or more of these embodiments can be improved through the use of error correction/detection information.

摘要翻译： 无线通信接收机，例如包括在基站或无线通信网络的移动台中的无线通信收发器中的接收机，包括参数化的G-RAKE接收机电路和一个在每一个中计算参数缩放参数的方法 传输间隔的基础。 在一个实施例中，针对单个传输时隙获得测量的损害相关性，并用于估计缩放参数的瞬时值。 然后根据一个或多个限定的限制来限制那些瞬时值中的一个或两个。 在其他实施例中，使用多个传输时隙来增加可用于估计缩放参数的测量数量，并且可选地应用参数约束。 另外的实施例使用迭代方法和/或解决一个参数，并且使用结果来获得其他参数。 可以通过使用错误校正/检测信息来改进这些实施例中的一个或多个。