公开(公告)号：US07711765B2

公开(公告)日：2010-05-04

申请号：US11357816

申请日：2006-02-17

申请人： Yi-Pin Eric Wang ,  Gregory E. Bottomley ,  Andres Reial

发明人： Yi-Pin Eric Wang ,  Gregory E. Bottomley ,  Andres Reial

IPC分类号： G06F15/00

CPC分类号： G06F7/5443 ,  H04B2201/709727

摘要： A method and corresponding circuit for determining a final result for a desired series of multiply-and-accumulate (MAC) operations are based on counting the occurrence of products in the desired series of MAC operations, multiplying the counts by their corresponding products to obtain partial sums, and adding the partial sums to obtain the final result. MAC processing as taught herein can be applied to a wide range of applications, such as received signal processing in wireless communication for computationally efficient (and high-rate) generation of interference correlation estimates and/or equalization filter values for a received communication signal.

摘要翻译： 用于确定期望的一系列乘法和累加（MAC）操作的最终结果的方法和相应的电路是基于计算所需系列MAC操作中的乘积的发生，将计数乘以其相应乘积以获得部分 总和，并添加部分和以获得最终结果。 如本文教导的MAC处理可以应用于广泛的应用，例如用于无线通信中的接收信号处理，用于接收的通信信号的计算有效（和高速率）产生干扰相关估计和/或均衡滤波器值。

公开(公告)号：US20100020854A1

公开(公告)日：2010-01-28

申请号：US12177498

申请日：2008-07-22

申请人： Ning He ,  Gregory E. Bottomley ,  Erik Larsson

发明人： Ning He ,  Gregory E. Bottomley ,  Erik Larsson

IPC分类号： H04B1/707 ,  H04J13/00

CPC分类号： H04B1/712 ,  H04B2201/709727

摘要： According to the teachings presented herein, a method and apparatus for communication signal processing advantageously use a mix of parametric and non-parametric correlation estimation in communication signal processing. Non-parametric estimation generates an “overall” correlation estimate for a received communication signal, and parametric estimation generates a “component” correlation estimate. The component correlation estimate is removed from the overall correlation estimate to form a partial correlation estimate that is used to process the received communication signal at least initially, such as in a pre-equalization stage. The overall and component correlation estimates are generated as impairment and/or data correlation estimates.

摘要翻译： 根据本文给出的教导，用于通信信号处理的方法和装置有利地在通信信号处理中使用参数和非参数相关估计的混合。 非参数估计对接收到的通信信号产生“总体”相关估计，参数估计产生“分量”相关估计。 从总体相关估计中去除分量相关估计，以形成一个部分相关估计，该估计用于至少最初处理接收的通信信号，例如在预均衡阶段。 总体和分量相关估计是作为减值和/或数据相关估计产生的。

公开(公告)号：US07602838B2

公开(公告)日：2009-10-13

申请号：US11314740

申请日：2005-12-22

申请人： Gregory E. Bottomley ,  Jung-Fu Cheng

发明人： Gregory E. Bottomley ,  Jung-Fu Cheng

IPC分类号： H04B1/00 ,  H04B1/10

CPC分类号： H03M13/2957 ,  H03M13/6331 ,  H04B1/712 ,  H04B2201/709727 ,  H04L1/0048 ,  H04L1/005 ,  H04L25/03063

摘要： A linear turbo-equalizer for use in a CDMA receiver equalizes a despread received signal (rather than the spread received signal) to suppress self-interference resulting from coupling between transmitted symbols. In an example implementation, a linear equalizer based on a generalized-Rake (G-Rake) receiver design uses decoder feedback in forming Rake combining weights as well as in forming a self-interference estimate removed from the equalizer signal provided to the decoder. Preferably, turbo de-coding is also performed. In that case, each turbo-decoder component preferably executes one pass before feeding back information to the equalizer. This ensures that the turbo-decoder does not prematurely lock onto an incorrect code word before feeding back extrinsic information to the equalizer.

摘要翻译： 用于CDMA接收机的线性turbo均衡器使解扩展的接收信号（而不是扩展接收信号）均衡，以抑制由传输符号之间的耦合产生的自干扰。 在示例实现中，基于广义Rake（G-Rake）接收机设计的线性均衡器在形成Rake组合权重时使用解码器反馈，以及形成从提供给解码器的均衡器信号中去除的自干扰估计。 优选地，还执行turbo解码。 在这种情况下，每个turbo解码器组件优选地在将信息反馈给均衡器之前执行一次通过。 这确保了在将外部信息反馈给均衡器之前，turbo解码器不会过早地锁定到不正确的代码字。

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：US07440489B2

公开(公告)日：2008-10-21

申请号：US09923374

申请日：2001-08-07

申请人： Erik Dahlman ,  Yi-Pin Eric Wang ,  Paul W. Dent ,  Gregory E. Bottomley ,  Ali Khayrallah ,  Christer Östberg

发明人： Erik Dahlman ,  Yi-Pin Eric Wang ,  Paul W. Dent ,  Gregory E. Bottomley ,  Ali Khayrallah ,  Christer Östberg

IPC分类号： H04K1/00 ,  H04B15/00 ,  H04L27/30

CPC分类号： H04B1/7115 ,  H04B1/7075 ,  H04B1/709 ,  H04B1/712 ,  H04B2201/7071 ,  H04B2201/709727

摘要： A spread spectrum signal is processed by correlating the spread spectrum signal with a spreading sequence at a first plurality of correlation times to produce a first plurality of time-offset correlations. The first plurality of time-offset correlations is processed to produce a first symbol representation for a symbol. A first quality is determined for the first symbol representation. Responsive to the determined first quality, it is determined whether to further process the first symbol representation or to process a second symbol representation for the symbol generated from the spread spectrum signal. The first quality may be determined, for example, by decoding the first symbol representations to generate a decoding metric or error check indicator, such as a CRC result. The symbol representations may be generated and/or evaluated for quality in a serial fashion or a parallel fashion.

摘要翻译： 通过在第一多个相关时间将扩展频谱信号与扩频序列相关来处理扩展频谱信号，以产生第一多个时间偏移相关。 处理第一多个时间偏移相关以产生符号的第一符号表示。 确定第一个符号表示的第一个质量。 响应于确定的第一质量，确定是否进一步处理第一符号表示或处理从扩频信号产生的符号的第二符号表示。 可以例如通过对第一符号表示进行解码以产生诸如CRC结果的解码度量或错误检查指示符来确定第一质量。 符号表示可以以串行方式或并行方式生成和/或评估质量。

公开(公告)号：US20080130719A1

公开(公告)日：2008-06-05

申请号：US11566756

申请日：2006-12-05

申请人： Gregory E. Bottomley ,  Yi-Pin Eric Wang ,  Stephen J. Grant

发明人： Gregory E. Bottomley ,  Yi-Pin Eric Wang ,  Stephen J. Grant

IPC分类号： H04B1/707

CPC分类号： H04B1/712

摘要： Processing in a baseband processor is improved by estimating channelization code powers when processing received signals and reducing at least one of interference and noise power from the code power estimates. According to one embodiment of a wireless communication device such as a mobile phone or Local Area Network (LAN) adapter, the device comprises circuitry configured to receive a composite signal having contributions from a signal of interest and one or more interfering signals and a baseband processor. The baseband processor is configured to estimate channelization code powers for a channelization code associated with the signal of interest and one or more channelization codes associated with the one or more interfering signals. The baseband processor is also configured to reduce at least one of interference and noise power from the channelization code power estimates.

摘要翻译： 通过在处理接收到的信号时估计信道化码功率并且从代码功率估计中减少干扰和噪声功率中的至少一个来改善基带处理器中的处理。 根据诸如移动电话或局域网（LAN）适配器的无线通信设备的一个实施例，该设备包括被配置为接收具有来自感兴趣的信号和一个或多个干扰信号的贡献的复合信号的电路和基带处理器 。 基带处理器被配置为估计与感兴趣的信号相关联的信道化码和与一个或多个干扰信号相关联的一个或多个信道化码的信道化码功率。 基带处理器还被配置为从信道化码功率估计中减少干扰和噪声功率中的至少一个。

公开(公告)号：US20080080646A1

公开(公告)日：2008-04-03

申请号：US11538074

申请日：2006-10-03

申请人： Gregory E. Bottomley ,  Carmela Cozzo

发明人： Gregory E. Bottomley ,  Carmela Cozzo

IPC分类号： H03D1/00 ,  H04L27/06 ,  H04L1/02

CPC分类号： H04L25/0242 ,  H04B1/712 ,  H04B2201/709727 ,  H04L25/0228

摘要： Channel response and impairment correlation estimates are iteratively determined. According to one embodiment of performing channel estimation for use in received signal processing, a channel response estimate is calculated based on an initial impairment correlations estimate and a measured channel response derived from a received signal. A revised impairment correlations estimate is calculated using a parametric approach based on the channel response estimate and the channel response estimate is recalculated based on the revised impairment correlations estimate. According to one embodiment of a wireless communication device, the device comprises a parameter estimation unit configured to iteratively calculate a medium channel response estimate based on a parametric impairment correlations estimate and a measured net channel response derived from a received signal. The wireless communication device also comprises circuitry configured to control how many times the parameter estimation unit calculates the medium channel response estimate.

摘要翻译： 迭代确定信道响应和损害相关估计。 根据对在接收信号处理中使用的信道估计的一个实施例，基于初始损害相关估计和从接收信号导出的测量信道响应来计算信道响应估计。 使用基于信道响应估计的参数方法来计算修正的损害相关估计，并且基于修正的损害相关估计重新计算信道响应估计。 根据无线通信设备的一个实施例，该设备包括参数估计单元，该参数估计单元被配置为基于参数损害相关估计和从接收到的信号导出的测量的净信道响应来迭代地计算介质信道响应估计。 无线通信设备还包括被配置为控制参数估计单元计算媒体信道响应估计的次数的电路。

公开(公告)号：US20070189363A1

公开(公告)日：2007-08-16

申请号：US11276069

申请日：2006-02-13

申请人： Hakan Bengt Eriksson ,  Carmela Cozzo ,  Ali S. Khayrallah ,  Gregory E. Bottomley ,  Yi-Pin Eric Wang

发明人： Hakan Bengt Eriksson ,  Carmela Cozzo ,  Ali S. Khayrallah ,  Gregory E. Bottomley ,  Yi-Pin Eric Wang

IPC分类号： H04B1/00

CPC分类号： H04B1/712 ,  H04B1/71052 ,  H04B1/711 ,  H04B2201/709727

摘要： The computational complexity required for interference suppression in the reception of wireless communications from multiple users is reduced by sharing information among the users. In some situations, information indicative of a statistical characteristic of the interference is shared among the users. Delays used to produce the interference statistic information are determined based on rake finger delays employed by the users. In some situations, a parameter estimate that is used to calculate combining weights for the users is shared among the users.

摘要翻译： 通过在用户之间共享信息来减少在多个用户的无线通信的接收中的干扰抑制所需的计算复杂度。 在某些情况下，用户之间共享指示干扰的统计特性的信息。 用于产生干扰统计信息的延迟是基于用户使用的耙指延迟来确定的。 在某些情况下，用户之间共享用于计算用户组合权重的参数估计。

公开(公告)号：US06891883B2

公开(公告)日：2005-05-10

申请号：US10365857

申请日：2003-02-13

申请人： Essam Sourour ,  Gregory E. Bottomley ,  Rajaram Ramesh

发明人： Essam Sourour ,  Gregory E. Bottomley ,  Rajaram Ramesh

IPC分类号： H04B1/7113 ,  H04B1/7115 ,  H04B1/7117 ,  H04B1/707

CPC分类号： H04B1/7117 ,  H04B1/7113 ,  H04B1/7115

摘要： A direct sequence spread spectrum receiver for operating in a multipath fading channel comprises a rake receiver having plural rake fingers. Each rake finger demodulates a received signal from one of plural channel paths. The output of the plural rake fingers are combined. Each rake finger utilizes a select assigned delay to synchronize to a delay of the one channel path. A searcher periodically performs a channel search on the received signal to detect new delays of strongest paths in the channel. Plural trackers, one for each channel path, adjust the select assigned delays between searches performed by the searcher. A delay controller is operatively coupled to the searcher and the trackers. The delay controller compares new delays of the strongest paths from the searcher to the select assigned delays and reassigns one of the select assigned delays with one of the new delays only if the new delay differs from the one select assigned delay more than a predetermined threshold.

摘要翻译： 用于在多径衰落信道中操作的直接序列扩频接收机包括具有多个耙指的耙式接收机。 每个耙指解调来自多个通道路径之一的接收信号。 多个耙指的输出被组合。 每个耙指使用选择分配的延迟来同步到一个通道路径的延迟。 搜索者周期性地对接收到的信号执行频道搜索，以检测频道中最强路径的新延迟。 多个跟踪器（每个通道路径一个）调整由搜索器执行的搜索之间的选择分配的延迟。 延迟控制器可操作地耦合到搜索器和跟踪器。 延迟控制器将来自搜索器的最强路径的新延迟与选择分配的延迟进行比较，并且只有当新延迟与超过预定阈值的一个选择分配的延迟不同时，才将所选择的分配的延迟之一与新的延迟之一重新分配。

公开(公告)号：US06798852B2

公开(公告)日：2004-09-28

申请号：US09742173

申请日：2000-12-20

申请人： Ali S. Khayrallah ,  Gregory E. Bottomley

发明人： Ali S. Khayrallah ,  Gregory E. Bottomley

IPC分类号： G06F946

CPC分类号： H04L1/005 ,  H03M13/2707 ,  H03M13/2721 ,  H03M13/2957 ,  H03M13/3905 ,  H03M13/6325 ,  H03M13/6331 ,  H04L1/0055 ,  H04L1/0071 ,  H04L25/03171 ,  H04L25/03318 ,  H04L25/03337 ,  H04L25/067 ,  H04L27/22 ,  H04L27/38

摘要： Methods and devices for extracting a joint probability from a MAP decision device are provided. Probability information associated with a first symbol and a second symbol is obtained from the MAP decision device. A joint probability of the first symbol and the second symbol is determined from the probability information associated with the first symbol and the second symbol. Methods and devices for processing a signal containing information associated with a plurality of transmitted bits using the generated joint probability information are also provided. The MAP decision device in various embodiments is a demodulator or a decoder.

摘要翻译： 提供了从MAP决策装置提取联合概率的方法和装置。 从MAP决定装置获得与第一符号和第二符号相关联的概率信息。 从与第一符号和第二符号相关联的概率信息确定第一符号和第二符号的联合概率。 还提供了使用所生成的联合概率信息来处理包含与多个发送位相关的信息的信号的方法和设备。 各种实施例中的MAP决定装置是解调器或解码器。