公开(公告)号：US08270453B2

公开(公告)日：2012-09-18

申请号：US12263712

申请日：2008-11-03

申请人： Ali S. Khayrallah ,  Carmela Cozzo ,  Tracy Fulghum

发明人： Ali S. Khayrallah ,  Carmela Cozzo ,  Tracy Fulghum

IPC分类号： H04B1/00

CPC分类号： H04B1/7107 ,  H04B1/7105

摘要： A parallel interference cancellation (PIC) receiver incrementally removes interference from signals in parallel modules in successive stages. For each desired signal, as interfering signals are removed, corresponding updates to a data covariance matrix are modeled as computationally tractable rank-one updates to a root matrix of the covariance matrix. Processing of signals and/or covariance information may be initiated, continued, and/or halted at various stages, e.g., in response to signal or data quality. The PIC receiver using root matrix updates is applicable to a variety of demodulation techniques.

摘要翻译： 并行干扰消除（PIC）接收器逐渐地消除了连续级并行模块中信号的干扰。 对于每个期望的信号，随着干扰信号被去除，对数据协方差矩阵的相应更新被建模为协方差矩阵的根矩阵的计算上易于处理的一级更新。 信号和/或协方差信息的处理可以在各个阶段（例如响应信号或数据质量）被启动，继续和/或停止。 使用根矩阵更新的PIC接收器适用于各种解调技术。

公开(公告)号：US20100111239A1

公开(公告)日：2010-05-06

申请号：US12263712

申请日：2008-11-03

申请人： Ali S. Khayrallah ,  Carmela Cozzo ,  Tracy Fulghum

发明人： Ali S. Khayrallah ,  Carmela Cozzo ,  Tracy Fulghum

IPC分类号： H04B1/10

CPC分类号： H04B1/7107 ,  H04B1/7105

摘要： A parallel interference cancellation (PIC) receiver incrementally removes interference from signals in parallel modules in successive stages. For each desired signal, as interfering signals are removed, corresponding updates to a data covariance matrix are modeled as computationally tractable rank-one updates to a root matrix of the covariance matrix. Processing of signals and/or covariance information may be initiated, continued, and/or halted at various stages, e.g., in response to signal or data quality. The PIC receiver using root matrix updates is applicable to a variety of demodulation techniques.

摘要翻译： 并行干扰消除（PIC）接收器逐渐地消除了连续级并行模块中信号的干扰。 对于每个期望的信号，随着干扰信号被去除，对数据协方差矩阵的相应更新被建模为协方差矩阵的根矩阵的计算上易于处理的一级更新。 信号和/或协方差信息的处理可以在各个阶段（例如响应信号或数据质量）被启动，继续和/或停止。 使用根矩阵更新的PIC接收器适用于各种解调技术。

公开(公告)号：US07929593B2

公开(公告)日：2011-04-19

申请号：US12103145

申请日：2008-04-15

申请人： Ali S. Khayrallah ,  Carmela Cozzo ,  Tracy L. Fulghum

发明人： Ali S. Khayrallah ,  Carmela Cozzo ,  Tracy L. Fulghum

IPC分类号： H04L27/30

CPC分类号： H04B1/7105 ,  H04B1/71072 ,  H04B1/712 ,  H04B2201/709727

摘要： Methods and apparatus for processing a composite communication signal comprising two or more received signals of interest are disclosed. An interference-suppressing receiver, which may comprise a G-Rake receiver or a linear chip equalizer, utilizes a square-root covariance matrix in processing received signals, where the square-root covariance matrix represents impairment covariance or data covariance for the composite communication signal. In an exemplary method, a receiver detects symbols, corresponding to a signal of interest, from the composite communication signal, using processing weights calculated from a square-root covariance matrix and a net channel response for the signal of interest. The method further comprises calculating a reconstructed version of the signal of interest from the detected first symbols, generating an updated communication signal by subtracting the reconstructed version of the first signal of interest from the composite communication signal, and updating the square-root covariance matrix to obtain an updated square-root covariance matrix.

摘要翻译： 公开了用于处理包括两个或更多个所关注的信号的复合通信信号的方法和装置。 可以包括G-Rake接收机或线性码片均衡器的干扰抑制接收机在处理接收信号中使用平方根协方差矩阵，其中平方根协方差矩阵表示复合通信信号的损害协方差或数据协方差 。 在一种示例性方法中，接收机使用从平方根协方差矩阵计算的处理权重和感兴趣信号的净信道响应，从复合通信信号中检测与感兴趣信号相对应的符号。 该方法还包括从检测到的第一符号计算感兴趣信号的重构版本，通过从复合通信信号中减去感兴趣的第一信号的重构版本，并将平方根协方差矩阵更新为 获得更新的平方根协方差矩阵。

公开(公告)号：US07389099B2

公开(公告)日：2008-06-17

申请号：US11112578

申请日：2005-04-22

申请人： Carmela Cozzo ,  Yi-Pin Wang ,  Håkan B Eriksson ,  Gregory E. Bottomley ,  Ali S. Khayrallah

发明人： Carmela Cozzo ,  Yi-Pin Wang ,  Håkan B Eriksson ,  Gregory E. Bottomley ,  Ali S. Khayrallah

IPC分类号： H04B1/18

CPC分类号： H04B1/7107 ,  H04B2201/709727

摘要： A method and apparatus in a radio receiver for canceling interference from a high power, high data rate signal received in a combined signal that includes a contribution from the high power signal and a contribution from a lower power signal. It is first determined whether the high power signal was correctly received. A CRC checksum may be used to determine whether the high power signal was received with a good reliability. Thereafter, the contribution of the high power signal is removed from the received signal only if the high power signal was correctly received. The contribution of the high power signal may be removed by hard-subtracting the contribution of the high power signal from the received signal if all of the bits of the checksum are correct, and soft-subtracting the contribution of the high power signal from the received signal if most, but not all, of the bits in the checksum are correct.

摘要翻译： 一种无线电接收机中的方法和装置，用于消除在包括来自高功率信号的贡献和来自低功率信号的贡献的组合信号中接收的高功率，高数据速率信号的干扰。 首先确定高功率信号是否正确接收。 可以使用CRC校验和来确定高功率信号是否以良好的可靠性被接收。 此后，仅当正确接收到高功率信号时，才从接收信号中去除高功率信号的贡献。 如果校验和的所有比特都正确，则可以通过从接收到的信号中硬减去高功率信号的贡献来消除高功率信号的贡献，并且从所接收到的功率信号中减去高功率信号的贡献 信号，如果校验和中的大多数但不是全部的位是正确的。

公开(公告)号：US20090257477A1

公开(公告)日：2009-10-15

申请号：US12103145

申请日：2008-04-15

申请人： Ali S. Khayrallah ,  Carmela Cozzo ,  Tracy L. Fulghum

发明人： Ali S. Khayrallah ,  Carmela Cozzo ,  Tracy L. Fulghum

IPC分类号： H04B1/707 ,  H04B1/10 ,  H04L27/01

CPC分类号： H04B1/7105 ,  H04B1/71072 ,  H04B1/712 ,  H04B2201/709727

摘要： Methods and apparatus for processing a composite communication signal comprising two or more received signals of interest are disclosed. An interference-suppressing receiver, which may comprise a G-Rake receiver or a linear chip equalizer, utilizes a square-root covariance matrix in processing received signals, where the square-root covariance matrix represents impairment covariance or data covariance for the composite communication signal. In an exemplary method, a receiver detects symbols, corresponding to a signal of interest, from the composite communication signal, using processing weights calculated from a square-root covariance matrix and a net channel response for the signal of interest. The method further comprises calculating a reconstructed version of the signal of interest from the detected first symbols, generating an updated communication signal by subtracting the reconstructed version of the first signal of interest from the composite communication signal, and updating the square-root covariance matrix to obtain an updated square-root covariance matrix.

摘要翻译： 公开了用于处理包括两个或更多个所关注的信号的复合通信信号的方法和装置。 可以包括G-Rake接收机或线性码片均衡器的干扰抑制接收机在处理接收信号中使用平方根协方差矩阵，其中平方根协方差矩阵表示复合通信信号的损害协方差或数据协方差 。 在一种示例性方法中，接收机使用从平方根协方差矩阵计算的处理权重和感兴趣信号的净信道响应，从复合通信信号中检测与感兴趣信号相对应的符号。 该方法还包括从检测到的第一符号计算感兴趣信号的重构版本，通过从复合通信信号中减去感兴趣的第一信号的重构版本，并将平方根协方差矩阵更新为 获得更新的平方根协方差矩阵。

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：US07830952B2

公开(公告)日：2010-11-09

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：US07586974B2

公开(公告)日：2009-09-08

申请号：US10968228

申请日：2004-10-19

申请人： Ali S. Khayrallah ,  Gregory E. Bottomley ,  H{dot over (a)}kan B. Eriksson ,  Carmela Cozzo

发明人： Ali S. Khayrallah ,  Gregory E. Bottomley ,  H{dot over (a)}kan B. Eriksson ,  Carmela Cozzo

IPC分类号： H04B1/00

CPC分类号： H04B1/7117 ,  H04B1/709 ,  H04B2201/709727

摘要： A Direct-Sequence Code Division Multiple Access (DS-CDMA) receiver and method of allocating probing correlators and combining correlators (fingers). A front-end processor converts received radio signals to baseband samples. Based on average path strengths, a controller adaptively allocates probing correlators to signal paths to de-spread certain received signals. Based on path power estimates, the controller adaptively allocates combining correlators to signal paths. The allocations may be made to minimize the total received power at the receiver, or to achieve acceptable performance for all users.

摘要翻译： 直接序列码分多址（DS-CDMA）接收机和分配探测相关器并组合相关器（手指）的方法。 前端处理器将接收到的无线电信号转换为基带采样。 基于平均路径强度，控制器自适应地将探测相关器分配给信号路径以对某些接收信号进行解扩。 基于路径功率估计，控制器自适应地将组合相关器分配给信号路径。 可以进行分配以最小化接收机处的总接收功率，或为所有用户实现可接受的性能。

公开(公告)号：US07469024B2

公开(公告)日：2008-12-23

申请号：US10653679

申请日：2003-09-02

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

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

IPC分类号： H04B7/10

CPC分类号： H04B1/7113 ,  H04B1/7117

摘要： A receiver based on a RAKE receiver architecture includes a logic circuit configured to assign one or more RAKE fingers to a finger placement grid that is independent from a searcher delay grid used by the receiver's searcher in generating multipath delay profiles for received signals. The logic circuit may use the multipath delay profile to “tune” the finger placement grid relative to the searcher delay grid but the delay resolution of the finger placement grid is independent of the searcher delay grid. This independence permits, for example, setting the finger placement grid to a delay resolution based on a Nyquist criterion independently from the delay resolution used by the searcher. The receiver may use two or more finger placement grids, may operate in a mixed mode where fingers are assigned on- and off-grid, and may operate selectively in grid or non-grid modes.

摘要翻译： 基于RAKE接收器架构的接收机包括逻辑电路，其被配置为将一个或多个RAKE指状物分配给手指放置网格，该手指放置网格独立于由接收机的搜索器在为接收的信号生成多径延迟分布时使用的搜索器延迟网格。 逻辑电路可以使用多径延迟分布来相对于搜索器延迟网格“调谐”手指放置网格，但手指放置网格的延迟分辨率与搜索器延迟网格无关。 这种独立性允许例如，将独立于搜索者使用的延迟分辨率的手指放置网格设置为基于奈奎斯特准则的延迟分辨率。 接收器可以使用两个或更多个手指放置网格，可以以手指被分配在离线和离网上的混合模式操作，并且可以以网格或非网格模式选择性地操作。

公开(公告)号：US07460583B2

公开(公告)日：2008-12-02

申请号：US10736122

申请日：2003-12-15

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

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

IPC分类号： H04B1/00

CPC分类号： H04B1/707 ,  H04B1/7117 ,  H04B2201/709727

摘要： The present application describes a new path search and verification method and apparatus for identifying and selecting one or more delays for a receiver. A front-end receiver receives a signal having one or more signal images, where each signal image has a corresponding signal delay. A tree generator builds a hierarchical delay tree from a plurality of delay nodes, each corresponding to one of the signal delays. A tree searcher searches through the delay tree to identify one or more surviving delay nodes, where each surviving delay node corresponds to a candidate delay for the receiver. The receiver may also include a state machine comprising a plurality of ordered states for providing candidate delays for the receiver. The state machine stores the candidate delays and shifts the candidate delays between states within the state machine based on the latest results from the tree searcher.

摘要翻译： 本申请描述了用于识别和选择接收机的一个或多个延迟的新的路径搜索和验证方法和装置。 前端接收器接收具有一个或多个信号图像的信号，其中每个信号图像具有对应的信号延迟。 树生成器从多个延迟节点构建分层延迟树，每个延迟节点对应于一个信号延迟。 树搜索器通过延迟树搜索以识别一个或多个幸存延迟节点，其中每个存活的延迟节点对应于接收机的候选延迟。 接收机还可以包括状态机，其包括用于为接收机提供候选延迟的多个有序状态。 状态机根据树搜索器的最新结果存储候选延迟并在状态机内状态之间移动候选延迟。