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11.发明授权公开(公告)号：US06574293B1
公开(公告)日：2003-06-03
申请号：US09181203
申请日：1998-10-28
IPC分类号： H04B700
CPC分类号： H04L1/06 , H04B7/0845 , H04L25/03006 , H04L25/067
摘要： A method for reducing interference combines soft symbols using existing processing devices. In particular, transmitted data signals are received over a plurality of paths. The received data signal includes an interference component. The received data signals are processed to provide a plurality of soft symbols that correspond to the transmitted data signal. The plurality of soft symbols are combined to reduce the interference component of the data signal and provided output signal that corresponds to the transmitted data signal. Accordingly, existing equalizers and combiners may be used to reduce interference. Related mobile user terminal and receivers are disclosed.
摘要翻译： 减少干扰的方法使用现有的处理装置组合软符号。 特别地，发送的数据信号在多个路径上被接收。 所接收的数据信号包括干扰分量。 处理所接收的数据信号以提供对应于所发送的数据信号的多个软符号。 组合多个软符号以减少数据信号的干扰分量并提供对应于发送的数据信号的输出信号。 因此，可以使用现有的均衡器和组合器来减少干扰。 公开了相关的移动用户终端和接收机。
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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。
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13.发明授权公开(公告)号：US06798852B2
公开(公告)日：2004-09-28
申请号：US09742173
申请日：2000-12-20
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。
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公开(公告)号：US08451952B2
公开(公告)日：2013-05-28
申请号：US12650219
申请日：2009-12-30
IPC分类号： H04L27/06
CPC分类号： H03M13/2987 , H03M13/2957 , H03M13/296 , H03M13/3707 , H03M13/6325 , H03M13/6561 , H03M13/658 , H03M13/6591 , H04L1/005 , H04L25/03286
摘要： An iterative demodulator and decoder uses feedback attenuation to maintain proper balance between the demodulator and decoder. Balance is maintained by attenuating the influence of extrinsic information fed back from the decoder to the demodulator to prevent strong decisions by the decoder from overwhelming the demodulator.
摘要翻译： 迭代解调器和解码器使用反馈衰减来维持解调器和解码器之间的适当平衡。 通过衰减从解码器反馈到解调器的外部信息的影响来维持平衡，以防止解码器强制解调器压倒解调器。
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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。
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16.发明授权公开(公告)号：US07586974B2
公开(公告)日：2009-09-08
申请号：US10968228
申请日：2004-10-19
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。
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公开(公告)号：US07536158B2
公开(公告)日：2009-05-19
申请号：US10811699
申请日：2004-03-29
IPC分类号： H04B17/02
CPC分类号： H04B1/712 , H04B1/7097 , H04B2201/709727
摘要： A method and apparatus derives an impairment correlation matrix to process signals received at a wireless receiver over multiple paths of a multi-path channel. The receiver includes first and second impairment correlation estimators for estimating first and second impairment correlation matrices based on despread symbols received over multiple paths of a multi-path channel. The receiver then derives the impairment correlation matrix based on the estimated first and second impairment correlation matrices. The receiver may combine traffic despread values to suppress interference using weighting factors calculated based on the derived impairment correlation matrix. Further, the receiver may estimate a signal-to-interference ratio based on the derived impairment correlation matrix.
摘要翻译： 方法和装置导出损害相关矩阵以处理在多路径信道的多个路径上在无线接收机处接收的信号。 接收机包括用于基于在多路径信道的多个路径上接收的解扩符号来估计第一和第二损害相关矩阵的第一和第二损害相关估计器。 然后，接收机基于估计的第一和第二损害相关矩阵导出损害相关矩阵。 接收机可以组合业务解扩值以使用基于导出的损害相关矩阵计算的加权因子来抑制干扰。 此外，接收机可以基于导出的损害相关矩阵来估计信号干扰比。
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公开(公告)号：US07469024B2
公开(公告)日：2008-12-23
申请号：US10653679
申请日：2003-09-02
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。
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公开(公告)号：US07460583B2
公开(公告)日：2008-12-02
申请号：US10736122
申请日：2003-12-15
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。
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20.发明授权Method and apparatus for combining weight computation in a DS-CDMA RAKE receiver 有权用于在DS-CDMA RAKE接收机中组合权重计算的方法和装置公开(公告)号：US07397842B2
公开(公告)日：2008-07-08
申请号：US10672127
申请日：2003-09-26
IPC分类号： H04B1/00
CPC分类号： H04B1/712 , H04B1/711 , H04B2201/709727
摘要： A RAKE receiver circuit generates combining weights based on channel estimates and combining statistics that comprise channel coefficient statistics, noise statistics, and channel estimation error statistics. Together, these statistics incorporate the relationships in noise and channel estimation across two or more RAKE fingers, and thus improve combining weight generation. Exemplary determination of statistics comprises channel coefficient cross-correlations, noise cross-correlations, and channel estimation error cross-correlations. Determination of the statistics can be varied based on, for example, the assumption of default or nominal signal models. Further, statistics determination can be configured for different receive and transmit diversity scenarios, wherein combining statistics can be determined on a per diversity signal basis, or jointly for two or more diversity signals, or in a mixed separate/joint method wherein one or more statistics are determined on a per signal basis and one or more statistics are determined across the signals.
摘要翻译： RAKE接收机电路基于信道估计产生组合权重，并组合包括信道系数统计，噪声统计和信道估计误差统计的统计。 一起，这些统计结合了两个或更多个RAKE手指之间的噪声和信道估计的关系，从而改进了组合权重的产生。 统计量的示例性确定包括信道系数互相关，噪声互相关和信道估计误差互相关。 统计数据的确定可以根据例如默认或标称信号模型的假定而变化。 此外，可以针对不同的接收和发送分集场景配置统计确定，其中组合统计可以基于每个分集信号或联合地为两个或多个分集信号确定，或以混合分离/联合方法，其中一个或多个统计 在每个信号的基础上确定，并且跨信号确定一个或多个统计。
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