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1. 发明申请

US20090304132A1 Method and Apparatus for Efficient Estimation of Interference in a Wireless Receiver 有权
标题翻译：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。

2. 发明授权

US07590167B2 Method and apparatus for QAM demodulation in a generalized rake receiver 有权
标题翻译：广义Rake接收机中QAM解调的方法和装置
公开(公告)号：US07590167B2
公开(公告)日：2009-09-15
申请号：US11215584
申请日：2005-08-30
申请人： Tracy L. Fulghum , Douglas A. Cairns
发明人： Tracy L. Fulghum , Douglas A. Cairns
IPC分类号： H04B1/00
CPC分类号： H04B1/712 , H04B2201/709727
摘要： A wireless communication device includes a Generalized RAKE (G-RAKE) receiver circuit that is configured to determine a traffic-to-pilot gain scaling parameter as part of the impairment correlation determination process that underlies (G-RAKE) combining weight generation. In this manner, the receiver circuit conveniently and accurately accounts for gain differences between the pilot channel of a received CDMA signal, as used for channel estimation, and the traffic channel(s) of the CDMA signal, which carry received data to be recovered. The gain difference accounting enables proper demodulation of amplitude-modulated traffic signals. By way of non-limiting example, such gain scaling may be used for demodulating/decoding High Speed Downlink Packet Access (HSDPA) signals used in Wideband Code Division Multiple Access (W-CDMA) systems.
摘要翻译：无线通信设备包括广义RAKE（G-RAKE）接收器电路，其被配置为确定作为组合权重生成（G-RAKE）的基础的损害相关确定过程的一部分的业务到引导增益缩放参数。以这种方式，接收机电路方便且准确地考虑了用于信道估计的接收的CDMA信号的导频信道与携带接收的要恢复的数据的CDMA信号的业务信道之间的增益差。增益差计算能够对幅度调制的交通信号进行适当的解调。作为非限制性示例，这种增益缩放可以用于解调/解码在宽带码分多址（W-CDMA）系统中使用的高速下行链路分组接入（HSDPA）信号。

3. 发明授权

US07539240B2 Method and apparatus for parameter estimation in a generalized rake receiver 有权
标题翻译：广义耙式接收机中参数估计的方法和装置
公开(公告)号：US07539240B2
公开(公告)日：2009-05-26
申请号：US10800167
申请日：2004-03-12
申请人： Douglas A. Cairns , Gregory E. Bottomley , Yi-Pin Eric Wang , Tracy L. Fulghum , Elias Jonsson
发明人： Douglas A. Cairns , Gregory E. Bottomley , Yi-Pin Eric Wang , Tracy L. Fulghum , Elias Jonsson
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。

4. 发明授权

US08295417B2 Method and apparatus for efficient estimation of interference in a wireless receiver 有权
标题翻译：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。

5. 发明授权

US08964912B2 Adaptive timing recovery via generalized RAKE reception 有权
标题翻译：通过广义RAKE接收自适应定时恢复
公开(公告)号：US08964912B2
公开(公告)日：2015-02-24
申请号：US11219183
申请日：2005-09-02
申请人： Douglas A. Cairns , Gregory E. Bottomley , Yi-Pin Eric Wang
发明人： Douglas A. Cairns , Gregory E. Bottomley , Yi-Pin Eric Wang
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。

6. 发明授权

US08867676B2 Method and apparatus for controlling interference suppressing receivers 有权
标题翻译：用于控制干扰抑制接收机的方法和装置
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。

7. 发明授权

US08576960B2 Method and apparatus for efficient AMLD matrix computations 有权
标题翻译：用于高效AMLD矩阵计算的方法和装置
公开(公告)号：US08576960B2
公开(公告)日：2013-11-05
申请号：US12628341
申请日：2009-12-01
申请人： Douglas A. Cairns , Gregory E. Bottomley , Elias Jonsson
发明人： Douglas A. Cairns , Gregory E. Bottomley , Elias Jonsson
IPC分类号： H04L27/06 , H04L23/02
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。

8. 发明授权

US08428106B2 Efficient method for forming and sharing impairment covariance matrix 有权
标题翻译：形成和共享损伤协方差矩阵的有效方法
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。

9. 发明授权

US08411725B2 Channel geometry detector 有权
标题翻译：通道几何检测器
公开(公告)号：US08411725B2
公开(公告)日：2013-04-02
申请号：US12566749
申请日：2009-09-25
申请人： Douglas A. Cairns , Jaroslaw Niewczas , Yoshitaka Murata , Elias Jonsson
发明人： Douglas A. Cairns , Jaroslaw Niewczas , Yoshitaka Murata , Elias Jonsson
IPC分类号： H04B1/00 , H03H7/30
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。

10. 发明申请

US20120219155A1 METHODS AND DEVICES FOR ALLOCATING SCRAMBLING CODES 有权
标题翻译：用于分配SCRAMBLING代码的方法和设备
公开(公告)号：US20120219155A1
公开(公告)日：2012-08-30
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： H04K1/04 , H04W4/00
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： Methods and devices are provided whereby scrambling codes can be set in an improved way. In accordance with one embodiment a method is provided in a User Equipment for generating a second scrambling code or a second scrambling code group. The UE is configured for multi carrier operation receiving downlink transmission from a Universal Mobile Telecommunications System Terrestrial Radio Access Network on a set of at least two downlink carriers including an anchor carrier and at least a first secondary carrier. The method comprises determining a first scrambling code or a first scrambling code group associated with a first cell on the anchor carrier; and deriving a second scrambling code or a 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 or second scrambling code group and the first scrambling code or scrambling code group. Hereby interference suppression/cancellation processing is enabled in a receiver of a UE on secondary cells in multi-carrier scenarios that do not transmit the SCH, while minimizing the need for overhead in terms of signaling of the scrambling codes for neighbouring cells in a UTRAN system. Methods and devices for E-UTRAN are also described.
摘要翻译：提供了可以以改进的方式设置扰码的方法和装置。根据一个实施例，在用于生成第二扰码或第二扰码组的用户设备中提供了一种方法。 UE被配置用于多载波操作，从包括锚定载波和至少第一辅助载波的至少两个下行链路载波的集合中接收来自通用移动电信系统地面无线电接入网络的下行链路传输。该方法包括确定与锚定载波上的第一小区相关联的第一扰码或第一加扰码组; 以及使用定义第二加扰码或第二加扰码组与第一扰码或扰频码组之间的关系的预定义规则，导出与所述第一辅助载波上的第二小区相关联的第二扰码或第二扰码组。因此，在不发送SCH的多载波场景中的辅助小区的UE的接收机中实现干扰抑制/消除处理，同时最小化对在UTRAN系统中的相邻小区的扰码的信令的开销的需要。还描述了用于E-UTRAN的方法和设备。

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