专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

31. 发明申请

US20100054309A1 NONPARAMETRIC MIMO G-RAKE RECEIVER 有权
标题翻译：非绝对MIMO G-RAKE接收机
公开(公告)号：US20100054309A1
公开(公告)日：2010-03-04
申请号：US12198973
申请日：2008-08-27
申请人： Douglas A. Cairns , Elias Jonsson , Anders Rosenqvist , Andres Reial , Stephen Grant
发明人： Douglas A. Cairns , Elias Jonsson , Anders Rosenqvist , Andres Reial , Stephen Grant
IPC分类号： H04B1/707
CPC分类号： H04B1/712 , H04B2201/709727
摘要： With a nonparametric G-Rake receiver, combining weights may be determined using a nonparametric mechanism in multiple-input, multiple-output (MIMO) scenarios. In an example embodiment, a method for a receiving device having a nonparametric G-Rake receiver entails calculating an impairment covariance matrix and determining combining weights. More specifically, the impairment covariance matrix is calculated based on a pilot channel using a nonparametric mechanism in a MIMO scenario in which a code-reuse interference term exists. The combining weights are determined for the nonparametric G-Rake receiver responsive to the impairment covariance matrix and by accounting for the code-reuse interference term.
摘要翻译：使用非参数G-Rake接收机，可以使用多输入多输出（MIMO）场景中的非参数机制来确定组合权重。在示例实施例中，具有非参数G-Rake接收机的接收设备的方法需要计算损害协方差矩阵并确定组合权重。更具体地说，在存在码重用干扰项的MIMO场景中，基于使用非参数机制的导频信道来计算损害协方差矩阵。针对非参数G-Rake接收机响应于损害协方差矩阵并通过计算代码重用干扰项来确定组合权重。

32. 发明申请

US20090268787A1 Method and Apparatus for Compensating for Processing Timing Misalignment in a Communication Receiver 有权
标题翻译：用于补偿通信接收器中的处理定时不对准的方法和装置
公开(公告)号：US20090268787A1
公开(公告)日：2009-10-29
申请号：US12111526
申请日：2008-04-29
申请人： Douglas A. Cairns , Stephen J. Grant , Andres Reial , Mathias Riback
发明人： Douglas A. Cairns , Stephen J. Grant , Andres Reial , Mathias Riback
IPC分类号： H04L27/06
CPC分类号： H04B1/712 , H04B1/7105 , H04B1/7117 , H04B2201/709727
摘要： According to the teachings presented herein, a wireless communication apparatus compensates for timing misalignment in its received signal processing. In at least one embodiment, the apparatus estimates a set of path delays for a received signal and sets processing delays on the estimated path delays. The apparatus jointly hypothesizes combinations of fractional timing offsets for two or more paths, and computes a decision metric for each joint hypothesis that indicates the accuracy of the joint hypothesis. As non-limiting examples, the decision metric may be a signal quality metric, or a distance metric (such as between a measured net channel response and an effective net channel response reconstructed as a function of the combination of fractional timing offsets included in the joint hypothesis). The apparatus evaluates the decision metrics to identify a best estimate of timing misalignment, and correspondingly compensates coherent processing of the received signal.
摘要翻译：根据本文提出的教导，无线通信装置补偿其接收信号处理中的定时未对准。在至少一个实施例中，该装置估计接收信号的一组路径延迟并且对所估计的路径延迟设置处理延迟。该装置共同假设两个或多个路径的分数定时偏移的组合，并且计算指示联合假设的准确性的每个联合假设的决策度量。作为非限制性示例，决策度量可以是信号质量度量或距离度量（诸如在测量的净信道响应和作为包括在联合中的分数定时偏移的组合的函数之间重建的有效网络信道响应之间）假设）。设备评估决策度量以识别定时未对准的最佳估计，并相应地补偿接收信号的相干处理。

33. 发明申请

US20090245441A1 ROBUST ITERATIVE LINEAR SYSTEM SOLVERS 有权
标题翻译：坚固的迭代线性系统解决方案
公开(公告)号：US20090245441A1
公开(公告)日：2009-10-01
申请号：US12058494
申请日：2008-03-28
申请人： Douglas A. Cairns , Stephen Grant
发明人： Douglas A. Cairns , Stephen Grant
IPC分类号： H03D1/04 , H04B1/10 , H04L25/08
CPC分类号： G06F17/12 , H04B1/7115 , H04B1/712 , H04B7/0848 , H04B7/0854 , H04B7/0857 , H04B2201/70707 , H04B2201/709727
摘要： In receiving equipment such as a mobile terminal (1) for decoding received signals coded according to a CDMA method are decoded in an intermediate processor (9). In the decoding, coefficients or elements of a vector w are calculated in a unit or module (13) by an iterative method as a solution to a system of linear equations represented by the matrix equation Rw=h, where R is a matrix of known elements and h is a known vector. For terminating the iteration, a value of the signal to interference plus noise ratio SINR for the received signals is calculated in each iteration step and then this calculated value or a quantity derived therefrom is used as a stopping criterion or generally in a stopping algorithm.
摘要翻译：在用于解码根据CDMA方法编码的接收信号的移动终端（1）的接收设备中，在中间处理器（9）中被解码。在解码中，矢量w的系数或元素通过迭代方法以单位或模块（13）计算，作为由矩阵方程Rw = h表示的线性方程组的解，其中R是已知的矩阵元素和h是已知的向量。为了终止迭代，在每个迭代步骤中计算接收信号的信号与干扰加噪声比SINR的值，然后将该计算值或从其导出的量用作停止标准或通常用于停止算法。

34. 发明申请

US20090149147A1 Speed-Based, Hybrid Parametric/Non-parametric Equalization 有权
标题翻译：基于速度的混合参数/非参数均衡
公开(公告)号：US20090149147A1
公开(公告)日：2009-06-11
申请号：US12107623
申请日：2008-04-22
申请人： Elias Jonsson , Douglas A. Cairns , Kazuyoshi Uesaka , Hiroaki Watabe
发明人： Elias Jonsson , Douglas A. Cairns , Kazuyoshi Uesaka , Hiroaki Watabe
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。

35. 发明授权

US07027591B2 Integrated noise cancellation and residual echo suppression 有权
标题翻译：集成噪声消除和残余回波抑制
公开(公告)号：US07027591B2
公开(公告)日：2006-04-11
申请号：US10272095
申请日：2002-10-16
申请人： Douglas A. Cairns
发明人： Douglas A. Cairns
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： A combined processor, such as might be used in a mobile handset or hands-free communication device, provides residual echo suppression and noise reduction while eliminating the need for explicit comfort noise generation. Operating within a near-end communication device, the processor receives an echo-canceled signal that is derived from a near-end input signal, and generates an output signal for subsequent transmission to a far-end communication device by applying a noise attenuation factor to the echo-canceled signal or to an average of that signal. The processor maintains the average signal across periods of speech and non-speech. During far-end-modes of operation, where only incoming audio from the far-end is active, the processor substitutes the average signal for the echo-canceled signal, such that a far-end listener receives the natural sounding average signal without receiving the objectionable, residual echo that may be in the echo-canceled signal.
摘要翻译：诸如可能用于移动手持机或免提通信设备中的组合处理器提供残余回波抑制和噪声降低，同时消除对显着的舒适噪声生成的需要。在近端通信设备中操作，处理器接收从近端输入信号导出的回波消除信号，并且通过将噪声衰减因子应用于远端通信设备产生用于后续传输到远端通信设备的输出信号回波消除信号或该信号的平均值。处理器保持跨语音和非语音的平均信号。在远端操作模式中，只有来自远端的输入音频处于活动状态，处理器将平均信号替换为回波消除信号，使得远端收听者接收到自然探测平均信号而不接收令人反感的残余回波可能在回波消除信号中。

36. 发明授权

US07006790B2 Method and system for GPS bit-edge synchronization in the presence of burst-mode interference 有权
公开(公告)号：US07006790B2
公开(公告)日：2006-02-28
申请号：US09870072
申请日：2001-05-30
申请人： L. Scott Bloebaum , Douglas A. Cairns
发明人： L. Scott Bloebaum , Douglas A. Cairns
IPC分类号： H04B7/185
CPC分类号： G01S19/21 , G01S19/05 , G01S19/30 , H04L7/0334
摘要： In a satellite navigation system receiver co-located with a wireless communication system mobile terminal, periodic interference from the mobile terminal preventing bit-edge synchronization with one or more satellite signals is overcome by using Time Difference Of Arrival (TDOA) values associated with the satellite signals. Either a satellite signal free of periodic interference is chosen by inspection of the TDOA values, or the TDOA values are ranked and synchronization is attempted iteratively. Once a satellite signal is synchronized, the TDOA values are used to calculate synchronization for the remaining signals. The TDOA values may be transmitted to the mobile terminal by a satellite navigation signal information server connected to the wireless communication system, either individually or in broadcast mode to one or more cells. Alternatively, the mobile terminal may acquire the TDOA values from memory or from another data interface.

37. 发明授权

US08861623B2 Method and apparatus for allocating processing delays in multi-carrier systems 有权
标题翻译：用于在多载波系统中分配处理延迟的方法和装置
公开(公告)号：US08861623B2
公开(公告)日：2014-10-14
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： H04K1/10 , H04L27/28 , H04B1/7117 , H04L25/02
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。

38. 发明授权

US08224278B2 Convolutional impairment covariance estimation method and apparatus 有权
标题翻译：卷积损伤协方差估计方法和装置
公开(公告)号：US08224278B2
公开(公告)日：2012-07-17
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： H04B1/06 , H04B7/00
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。

39. 发明授权

US07983208B2 MMSE channel estimation in a communications receiver 有权
标题翻译：通信接收机中的MMSE信道估计
公开(公告)号：US07983208B2
公开(公告)日：2011-07-19
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： H04B7/216
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。

40. 发明申请

US20110075706A1 CHANNEL GEOMETRY DETECTOR 有权
标题翻译：通道几何检测器
公开(公告)号：US20110075706A1
公开(公告)日：2011-03-31
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： H04B1/707 , H04B1/10
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。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式