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公开(公告)号：US20110129000A1
公开(公告)日：2011-06-02
申请号：US12628341
申请日：2009-12-01
CPC分类号： H04L25/03006 , H04B1/71057 , H04B2201/709727 , H04L25/03178 , H04L25/03203 , H04L25/03331 , H04L2025/03426
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US20110075706A1
公开(公告)日：2011-03-31
申请号：US12566749
申请日：2009-09-25
CPC分类号： H04B1/712 , H04B2201/7071
摘要： 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.
摘要翻译： 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。
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公开(公告)号：US20100238980A1
公开(公告)日：2010-09-23
申请号：US12408939
申请日：2009-03-23
IPC分类号： H04B1/707
CPC分类号： H04B1/7115 , H04B1/7117 , H04B2201/709727 , H04L25/0216
摘要： 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.
摘要翻译： 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。
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14.发明申请METHOD AND APPARATUS FOR SETTING RECEIVED SIGNAL PROCESSING DELAYS AS A FUNCTION OF CHANNEL DISPERSIVENESS 有权用于设置接收信号处理延迟的方法和装置作为信道分配的功能公开(公告)号：US20100172396A1
公开(公告)日：2010-07-08
申请号：US12581943
申请日：2009-10-20
申请人： Douglas A. Cairns , Elias Jonsson , Göran Bergman
发明人： Douglas A. Cairns , Elias Jonsson , Göran Bergman
CPC分类号： H04B1/712 , H04B1/7113 , H04B1/7117
摘要： A method and apparatus provide for setting processing delay assignments in a CDMA receiver using a flat-channel placement or using a dispersive channel placement, in dependence on characterizing the channel as flat or dispersive. For example, a receiver maintains a logical flag reliably indicating the current channel state as flat or dispersive, and assigns or otherwise sets processing delays—e.g., for received signal demodulation—using a flat-channel placement algorithm or a dispersive-channel placement algorithm. The “flat-channel” placement algorithm generally provides better performance in flat-channel environments, and the “dispersive-channel” placement algorithm generally provides better performance in dispersive channel environments. Such processing may be regarded as “activating” a simplified processing delay placement grid that offers better performance if the channel truly is flat, with the underlying advantage of providing a reliable mechanism for detecting flat channel conditions.
摘要翻译： 一种方法和装置提供用于使用平面信道放置或使用色散信道放置来设置CDMA接收机中的处理延迟分配，这取决于将信道表示为平坦或分散。 例如，接收器将逻辑标志可靠地指示当前信道状态为平坦或分散，并且分配或以其他方式设置处理延迟，例如，对于接收信号解调，使用平坦信道布局算法或色散通道布局算法。 “平面通道”放置算法通常在平坦通道环境中提供更好的性能，“色散通道”放置算法通常在色散通道环境中提供更好的性能。 这样的处理可以被认为是“激活”简化的处理延迟布置网格，如果信道真的是平坦的，则提供更好的性能，其基本优点是提供用于检测平坦信道条件的可靠机制。
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15.发明授权Method and apparatus for setting received signal processing delays as a function of channel dispersiveness 有权用于将接收到的信号处理延迟设置为信道分散性的函数的方法和装置公开(公告)号：US08369383B2
公开(公告)日：2013-02-05
申请号：US12581943
申请日：2009-10-20
申请人： Douglas A. Cairns , Elias Jonsson , Göran Bergman
发明人： Douglas A. Cairns , Elias Jonsson , Göran Bergman
IPC分类号： H04B1/707
CPC分类号： H04B1/712 , H04B1/7113 , H04B1/7117
摘要： A method and apparatus provide for setting processing delay assignments in a CDMA receiver using a flat-channel placement or using a dispersive channel placement, in dependence on characterizing the channel as flat or dispersive. For example, a receiver maintains a logical flag reliably indicating the current channel state as flat or dispersive, and assigns or otherwise sets processing delays—e.g., for received signal demodulation—using a flat-channel placement algorithm or a dispersive-channel placement algorithm. The “flat-channel” placement algorithm generally provides better performance in flat-channel environments, and the “dispersive-channel” placement algorithm generally provides better performance in dispersive channel environments. Such processing may be regarded as “activating” a simplified processing delay placement grid that offers better performance if the channel truly is flat, with the underlying advantage of providing a reliable mechanism for detecting flat channel conditions.
摘要翻译： 一种方法和装置提供用于使用平面信道放置或使用色散信道放置来设置CDMA接收机中的处理延迟分配，这取决于将信道表示为平坦或分散。 例如，接收器将逻辑标志可靠地指示当前信道状态为平坦或分散，并且分配或以其他方式设置处理延迟，例如，对于接收信号解调，使用平坦信道布局算法或色散通道布局算法。 平面通道布局算法通常在平坦通道环境中提供更好的性能，并且色散通道布局算法通常在色散通道环境中提供更好的性能。 这种处理可以被认为是激活简化的处理延迟布置网格，如果信道真的是平坦的，则提供更好的性能，其基本优点是提供用于检测平坦信道条件的可靠机制。
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公开(公告)号：US08041325B2
公开(公告)日：2011-10-18
申请号：US12107623
申请日：2008-04-22
IPC分类号： H04B1/10
CPC分类号： H04B1/712 , H04B1/7097 , H04B2201/709727
摘要： A mobile receiver having a multi-mode interference suppression function and a way to estimate its speed utilizes a parametric approach to interference suppression at high speeds, and a nonparametric approach at low speeds. In particular, if the mobile receiver is currently operating in a nonparametric mode and its speed exceeds a first predetermined threshold, the mobile receiver switches to a parametric mode. Conversely, if the mobile receiver is currently in parametric mode and its speed is less than a second predetermined threshold, the mobile receiver switches to nonparametric mode. In one embodiment, the speed may be estimated by a Doppler frequency in the received signal, and the thresholds are Doppler frequencies. In one embodiment, the first and second thresholds are different, creating a hysteresis in the mode switching.
摘要翻译： 具有多模式干扰抑制功能的移动接收机和估计其速度的方法利用高速干扰抑制的参数化方法和低速度的非参数方法。 特别地，如果移动接收机当前正在以非参数模式操作并且其速度超过第一预定阈值，则移动接收机切换到参数模式。 相反，如果移动接收机当前处于参数模式并且其速度小于第二预定阈值，则移动接收机切换到非参数模式。 在一个实施例中，可以通过接收信号中的多普勒频率来估计速度，并且阈值是多普勒频率。 在一个实施例中，第一和第二阈值是不同的，在模式切换中产生迟滞。
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17.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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18.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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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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20.发明授权公开(公告)号：US08867676B2
公开(公告)日：2014-10-21
申请号：US10943720
申请日：2004-09-17
申请人： Douglas A. Cairns
发明人： Douglas A. Cairns
IPC分类号： H03D1/04 , H04L25/03 , H04B1/7097
CPC分类号： H04L25/03006 , H04B1/7097 , H04B2201/709727 , H04L2025/03535
摘要： A wireless communication receiver is configured to suppress interference with respect to a received signal of interest on a selective basis responsive to evaluating whether the receiver currently is or is not operating in a colored noise/interference environment. For example, an exemplary Code Division Multiple Access (CDMA) mobile station activates or deactivates interference suppression responsive to determining and evaluating an orthogonality factor, which, in this context, serves as a measure of how much downlink power gets converted into same-cell interference via multipath propagation. The orthogonality factor thus serves as an indicator of noise plus interference coloration. In one or more exemplary embodiments, then, an exemplary receiver circuit is configured to determine the orthogonality factor, evaluate it, and selectively enable or disable received signal whitening based on that evaluation. The exemplary receiver circuit and associated selective whitening method can be applied to various receiver architectures and signal types.
摘要翻译： 响应于评估接收机当前是否在彩色噪声/干扰环境中操作，无线通信接收机被配置为基于选择性来抑制关于所接收的感兴趣信号的干扰。 例如，示例性码分多址（CDMA）移动站响应于确定和评估正交因子而激活或去激活干扰抑制，在正交性因子中，其在下文中用作下载功率被转换成相同小区干扰的量度 通过多径传播。 因此，正交因子用作噪声加干扰着色的指标。 在一个或多个示例性实施例中，然后，示例性接收机电路被配置为确定正交因子，评估它，以及基于该评估选择性地启用或禁用接收信号白化。 示例性的接收机电路和相关的选择性白化方法可以应用于各种接收机架构和信号类型。
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