公开(公告)号：US20100303132A1

公开(公告)日：2010-12-02

申请号：US12472742

申请日：2009-05-27

申请人： Elias Jonsson ,  Oskar Drugge ,  Douglas A. Cairns

发明人： Elias Jonsson ,  Oskar Drugge ,  Douglas A. Cairns

IPC分类号： H04B1/707 ,  H04L27/28 ,  H04L27/00 ,  H04B1/10

CPC分类号： H04B1/7117 ,  H04L25/0202

摘要： A multi-carrier linear equalization receiver, e.g., a RAKE receiver or chip equalization receiver, is described herein. The multi-carrier receiver distributes processing delays among a plurality of received carriers based on a dispersion determined for each carrier. The receiver initially allocates a minimum number of processing delays sufficient for light dispersion to each carrier. For the dispersive carriers, the receiver allocates one or more additional processing delays. In one embodiment, the additional processing delays are allocated to the dispersive carriers based on SIR.

摘要翻译： 这里描述了多载波线性均衡接收机，例如RAKE接收机或码片均衡接收机。 多载波接收机基于为每个载波确定的色散，在多个接收载波中分配处理延迟。 接收机首先为每个载波分配足够的光散射的最小数量的处理延迟。 对于分散载体，接收机分配一个或多个附加的处理延迟。 在一个实施例中，基于SIR将附加处理延迟分配给色散载波。

公开(公告)号：US20100238980A1

公开(公告)日：2010-09-23

申请号：US12408939

申请日：2009-03-23

申请人： Douglas A. Cairns ,  Elias Jonsson ,  Kazuyoshi Uesaka

发明人： Douglas A. Cairns ,  Elias Jonsson ,  Kazuyoshi Uesaka

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。

公开(公告)号：US07711035B2

公开(公告)日：2010-05-04

申请号：US10943274

申请日：2004-09-17

申请人： Douglas A. Cairns ,  Leonid Krasny

发明人： Douglas A. Cairns ,  Leonid Krasny

IPC分类号： H04B1/00

CPC分类号： H04L25/03006

摘要： A frequency domain representation of a whitening filter is made to depend on essentially one unknown, namely, a scaling factor that is based on an estimated ratio of total base station power to the power spectral density (PSD) of inter-cell interference plus noise. In turn, that scaling factor can be computed based on the modeling terms used in a parametric model of the impairment correlations for a received communication signal. Preferably, the model comprises an interference impairment term scaled by a first model fitting parameter, and a noise impairment term scaled by a second model fitting parameter. Further, the scaling factor can be computed by directly estimating total base station transmit power and the PSD of inter-cell interference plus noise. In any case, the whitening filter can be used in whitening a received communication signal in conjunction with channel equalization processing or RAKE receiver processing, for example.

摘要翻译： 使白化滤波器的频域表示依赖于基本上一个未知数，即基于总基站功率与小区间干扰加上噪声的功率谱密度（PSD）的估计比的缩放因子。 反过来，可以基于在接收到的通信信号的损害相关性的参数模型中使用的建模项来计算该缩放因子。 优选地，该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。 此外，可以通过直接估计总基站发射功率和小区间干扰加上噪声的PSD来计算缩放因子。 在任何情况下，例如，白化滤波器可用于结合信道均衡处理或RAKE接收机处理来使接收到的通信信号变白。

公开(公告)号：US20090052584A1

公开(公告)日：2009-02-26

申请号：US11841264

申请日：2007-08-20

申请人： Douglas A. Cairns

发明人： Douglas A. Cairns

IPC分类号： H03D1/00

CPC分类号： H04B7/0854 ,  H04B1/7107 ,  H04B1/712 ,  H04B2201/709727 ,  H04L1/0002 ,  H04L1/20

摘要： Signal quality estimation and demodulation are tailored to the received signal quality. According to one embodiment, a received signal is processed by determining a first set of combining weights based on a first impairment covariance estimate derived assuming a low signal quality environment. A second set of combining weights is determined based on a second impairment covariance estimate derived assuming a high signal quality environment. A metric is determined corresponding to the difference between symbol estimates derived from the second set of combining weights and hard symbol decisions. The received signal is demodulated based on the second set of combining weights if the metric satisfies a threshold indicating high signal quality and otherwise based on the first set of combining weights.

摘要翻译： 信号质量估计和解调是针对接收到的信号质量量身定制的。 根据一个实施例，通过基于假设低信号质量环境导出的第一损害协方差估计来确定第一组合权重来处理接收信号。 基于假设高信号质量环境导出的第二损害协方差估计来确定第二组组合权重。 对应于从第二组合权重和硬符号决定导出的符号估计之间的差确定度量。 如果度量满足指示高信号质量的阈值，或者否则基于第一组合权重，则基于第二组合合权重解调接收信号。

公开(公告)号：US20080291887A1

公开(公告)日：2008-11-27

申请号：US11935604

申请日：2007-11-06

申请人： Douglas A. Cairns

发明人： Douglas A. Cairns

IPC分类号： H04J13/04 ,  H04B1/707

CPC分类号： H04B1/712 ,  H04B1/7115 ,  H04B2201/709727 ,  H04L25/0212 ,  H04L25/0228 ,  H04L25/024

摘要： Methods and apparatus are disclosed for calculating a channel response for use in received signal processing. In an exemplary embodiment, a method comprises calculating a channel response correlation matrix based on measured channel responses derived from pilot symbols in a received signal and forming a traffic data correlation matrix based on measurements of traffic symbols in the received signal. The traffic data correlation matrix, the channel response correlation matrix, and the measured channel responses are used in an minimum mean-squared error (MMSE) estimation process to calculate the channel response estimates. In one or more embodiments, the calculated channel response estimates comprise estimates of net channel response corresponding to signal processing delays in a G-RAKE receiver. An exemplary receiver circuit comprises a baseband processor configured to calculate channel response estimates according to one or more of the disclosed methods.

摘要翻译： 公开了用于计算在接收信号处理中使用的信道响应的方法和装置。 在示例性实施例中，一种方法包括基于从接收信号中的导频符号导出的测量信道响应来计算信道响应相关矩阵，并且基于接收信号中业务符号的测量形成业务数据相关矩阵。 在最小均方误差（MMSE）估计过程中使用业务数据相关矩阵，信道响应相关矩阵和测量的信道响应来计算信道响应估计。 在一个或多个实施例中，所计算的信道响应估计包括对应于G-RAKE接收机中的信号处理延迟的净信道响应的估计。 示例性的接收机电路包括被配置为根据所公开的方法中的一个或多个来计算信道响应估计的基带处理器。

公开(公告)号：US07456770B2

公开(公告)日：2008-11-25

申请号：US11681213

申请日：2007-03-02

申请人： Douglas A. Cairns

发明人： Douglas A. Cairns

IPC分类号： H03M3/00

CPC分类号： H03M3/468 ,  H03M3/462 ,  H04Q9/00

摘要： The sensor network described herein uses a distributed sigma-delta converter, where each of a plurality of sensor nodes includes a sigma-delta modulator communicatively coupled to a remotely located sigma-delta processor in a control hub. Each sensor node generates a serial bit stream representative of a sensor output signal. The control hub includes a plurality of signal processors, each of which receive and digitally process the serial bit stream wirelessly transmitted by a corresponding sensor node. A controller in the control hub analyzes the digital output from each signal processor to determine one or more characteristics of the sensor network.

摘要翻译： 本文描述的传感器网络使用分布式Σ-Δ转换器，其中多个传感器节点中的每一个包括通信地耦合到控制集线器中的远程位置的Σ-Δ处理器的Σ-Δ调制器。 每个传感器节点产生代表传感器输出信号的串行比特流。 控制集线器包括多个信号处理器，每个信号处理器接收和数字处理由相应的传感器节点无线传输的串行比特流。 控制集线器中的控制器分析来自每个信号处理器的数字输出，以确定传感器网络的一个或多个特性。

公开(公告)号：US20080211704A1

公开(公告)日：2008-09-04

申请号：US11681213

申请日：2007-03-02

申请人： Douglas A. Cairns

发明人： Douglas A. Cairns

IPC分类号： H03M1/60

CPC分类号： H03M3/468 ,  H03M3/462 ,  H04Q9/00

摘要： The sensor network described herein uses a distributed sigma-delta converter, where each of a plurality of sensor nodes includes a sigma-delta modulator communicatively coupled to a remotely located sigma-delta processor in a control hub. Each sensor node generates a serial bit stream representative of a sensor output signal. The control hub includes a plurality of signal processors, each of which receive and digitally process the serial bit stream wirelessly transmitted by a corresponding sensor node. A controller in the control hub analyzes the digital output from each signal processor to determine one or more characteristics of the sensor network.

摘要翻译： 本文描述的传感器网络使用分布式Σ-Δ转换器，其中多个传感器节点中的每一个包括通信地耦合到控制集线器中的远程位置的Σ-Δ处理器的Σ-Δ调制器。 每个传感器节点产生代表传感器输出信号的串行比特流。 控制集线器包括多个信号处理器，每个信号处理器接收和数字处理由相应的传感器节点无线传输的串行比特流。 控制集线器中的控制器分析来自每个信号处理器的数字输出，以确定传感器网络的一个或多个特性。

公开(公告)号：US08798176B2

公开(公告)日：2014-08-05

申请号：US12500891

申请日：2009-07-10

申请人： Douglas A. Cairns ,  Andres Reial ,  Anders Wallén

发明人： Douglas A. Cairns ,  Andres Reial ,  Anders Wallén

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L25/03261 ,  H04L25/03235

摘要： Channel estimation and/or equalization processing is performed in a wireless receiver in two stages. The first stage involves pre-filtering in the frequency domain to compact a grid-based representation of the net channel. The second stage involves implementing reduced-complexity time domain channel estimation and/or equalization. According to one embodiment, a received signal transmitted over a net channel is processed by pre-filtering the received signal in the frequency domain. The frequency domain pre-filtering compacts an N-tap effective grid-based representation of the net channel into a K-tap compacted grid-based representation of the net channel where K

摘要翻译： 信道估计和/或均衡处理在两个阶段中在无线接收机中执行。 第一阶段涉及在频域中进行预滤波以压缩网络通道的基于网格的表示。 第二阶段涉及实现降低复杂度的时域信道估计和/或均衡。 根据一个实施例，通过净频道发送的接收信号通过对频域中的接收信号进行预滤波来处理。 频域预滤波将网络通道的N抽头有效网格表示压缩成K

公开(公告)号：US08699553B2

公开(公告)日：2014-04-15

申请号：US12709239

申请日：2010-02-19

申请人： Anders Rosenqvist ,  Douglas A. Cairns ,  Andres Reial

发明人： Anders Rosenqvist ,  Douglas A. Cairns ,  Andres Reial

IPC分类号： H04B17/00 ,  H04L25/08

CPC分类号： H04L25/0226 ,  H04L25/0238

摘要： A signal-to-interference estimate is generated using unknown data symbols in place of or in addition to pilot symbols. Data received over a data channel (traffic channel or control channel) are collected. The data symbols are then used to compute an observation metric based on deviations of the data symbols from a predetermined set of possible data symbols, wherein one of the data symbols and symbol constellation is normalized. A data channel signal-to-interference ratio is then computed based on the observation metric.

摘要翻译： 使用未知数据符号代替导频符号或除导频符号之外，生成信号到干扰估计。 通过数据通道（业务信道或控制信道）接收的数据被收集。 然后，数据符号用于基于来自预定的一组可能的数据符号的数据符号的偏差来计算观测度量，其中数据符号和符号星座之一被归一化。 然后基于观测度量计算数据信道信号干扰比。

公开(公告)号：US08675879B2

公开(公告)日：2014-03-18

申请号：US13500590

申请日：2010-11-03

申请人： Oskar Drugge ,  Douglas A. Cairns ,  Muhammad Kazmi ,  Andres Reial

发明人： Oskar Drugge ,  Douglas A. Cairns ,  Muhammad Kazmi ,  Andres Reial

IPC分类号： H04K1/00

CPC分类号： H04J11/005 ,  H04B1/70735 ,  H04B1/7083 ,  H04J11/0073 ,  H04J11/0076 ,  H04J11/0079 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0048 ,  H04L25/0226 ,  H04L25/03866 ,  H04L27/2655

摘要： A method of operating a User Equipment (UE) for generating a second scrambling code group where the UE is configured for receiving downlink transmission from a Universal Mobile Telecommunications System Terrestrial Radio Access Network (UTRAN) on a set of at least two downlink carriers including an anchor carrier and at least a first secondary carrier includes: determining a first scrambling code group associated with a first cell on the anchor carrier and deriving the second scrambling code group associated with a second cell on said first secondary carrier using a predefined rule defining the relation between the second scrambling code group and the first scrambling code group.

摘要翻译： 一种操作用户设备（UE）的方法，用于生成第二扰码组，其中UE被配置用于从通用移动电信系统地面无线电接入网络（UTRAN）接收在至少两个下行链路载波的集合上的下行链路传输，所述至少两个下行链路载波包括 锚定载波和至少第一辅助载波包括：确定与所述锚定载波上的第一小区相关联的第一扰码组，并使用定义所述关系的预定义规则导出与所述第一辅助载波上的第二小区相关联的所述第二扰码组 在第二加扰码组和第一加扰码组之间。