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：US07773950B2

公开(公告)日：2010-08-10

申请号：US10869527

申请日：2004-06-16

申请人： Yi-Pin Eric Wang ,  Gregory E. Bottomley ,  Rajaram Ramesh

发明人： Yi-Pin Eric Wang ,  Gregory E. Bottomley ,  Rajaram Ramesh

IPC分类号： H04B17/00

CPC分类号： H04L1/20 ,  H04B2201/709727 ,  H04L1/0003 ,  H04L1/0026 ,  H04L1/206

摘要： A receiver circuit suppresses effects of “benign” impairment from the calculation of received signal quality estimates, such that the estimate depends primarily on the effects of non-benign impairment. For example, a received signal may be subject to same-cell and other-cell interference plus noise, which is generally modeled using a Gaussian distribution, and also may be due to certain forms of self-interference, such as quadrature phase interference arising from imperfect derotation of the pilot samples used to generate channel estimates for the received signal. Such interference generally takes on a distribution defined by the pilot signal modulation, e.g., a binomial distribution for binary phase shift keying modulation. Interference arising from such sources is relatively “benign” as compared to Gaussian interference and thus should be suppressed or otherwise discounted in signal quality calculations. Suppression may be based on subtracting benign impairment correlation estimates from total impairment correlation estimates, or on filtering the benign impairment in channel estimation.

摘要翻译： 接收机电路抑制从接收到的信号质量估计的计算中的“良性”损伤的影响，使得估计主要取决于非良性损伤的影响。 例如，接收到的信号可以经受相同小区和其他小区干扰加噪声，其通常使用高斯分布来建模，并且还可能是由于某些形式的自干扰，例如由 用于产生接收信号的信道估计的导频样本的不完全解旋。 这种干扰通常采用由导频信号调制定义的分布，例如二进制相移键控调制的二项分布。 与高斯干扰相比，从这些源产生的干扰相对“良性”，因此在信号质量计算中应被抑制或以其他方式折扣。 抑制可以基于从总损伤相关性估计中减去良性损伤相关估计，或者在滤波信道估计中的良性损伤。

公开(公告)号：US20100124206A1

公开(公告)日：2010-05-20

申请号：US12572423

申请日：2009-10-02

申请人： Gregory E. Bottomley ,  Dirk Gerstenberger ,  Lars Lindbom ,  Yi-Pin Eric Wang

发明人： Gregory E. Bottomley ,  Dirk Gerstenberger ,  Lars Lindbom ,  Yi-Pin Eric Wang

IPC分类号： H04J3/00 ,  H04B1/707

CPC分类号： H04W4/06 ,  H04B1/707 ,  H04B2201/70701 ,  H04J3/00 ,  H04J13/0044 ,  H04J13/20

摘要： A pilot channel signal for time-division multiplexing with one or more traffic channel signals in a broadcast/multi-cast signal and for code-division multiplexing with a continuously transmitted pilot channel signal is described. In an exemplary method for transmitting a broadcast/multicast signal, a pilot symbol sequence is obtained for each slot of one or more frames of the broadcast/multicast signal, so that the pilot symbol sequence varies for each slot of a given frame. The pilot symbol sequence for each slot is spread with a channelization code, and the spread pilot symbol sequence for each slot is scrambled, using a scrambling code, to form a first pilot channel signal. The first pilot channel signal is transmitted so that it is time-division multiplexed with one or more traffic channel signals transmitted during each slot and code-division multiplexed with a second pilot channel signal transmitted during all slots of the one or more frames.

摘要翻译： 描述了用于与广播/多播信号中的一个或多个业务信道信号进行时分复用并用于与连续发送的导频信道信号进行码分复用的导频信道信号。 在用于发送广播/多播信号的示例性方法中，为广播/多播信号的一个或多个帧的每个时隙获得导频符号序列，使得导频符号序列对于给定帧的每个时隙而变化。 每个时隙的导频符号序列用信道化码扩展，并且使用扰码对每个时隙的扩展导频符号序列进行加扰，以形成第一导频信道信号。 发送第一导频信道信号，使其与在每个时隙期间发送的一个或多个业务信道信号进行时分复用，并与在一个或多个帧的所有时隙期间发送的第二导频信道进行码分多路复用。

公开(公告)号：US20090316674A1

公开(公告)日：2009-12-24

申请号：US12141607

申请日：2008-06-18

申请人： Yi-Pin Eric Wang ,  Gregory E. Bottomley ,  Douglas A. Cairns

发明人： Yi-Pin Eric Wang ,  Gregory E. Bottomley ,  Douglas A. Cairns

IPC分类号： H04J13/04

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

摘要： According to the teachings presented herein, “spreading code” knowledge is used in forming amplitude references for QAM demodulation in a DS-CDMA receiver. Here, “spreading code” broadly refers to spreading/channelization codes, scrambling codes, or the product of such codes. Further, these teachings apply to any linear DS-CDMA demodulator, such as Rake, Generalized Rake (G-Rake), or chip equalizer, and to nonlinear demodulators that employ linear filtering, such as decision feedback equalizers (DFEs). Advantageously, the determination of symbol-specific amplitude references relies on shared correlation estimates and/or shared combining weights that are common to two or more symbols of interest, thereby significantly reducing processing requirements as compared to the use of symbol-specific impairment correlation estimates.

摘要翻译： 根据本文提出的教导，在DS-CDMA接收机中使用“扩展码”知识来形成QAM解调的幅度参考。 这里，“扩展码”广泛地指扩频/信道化码，扰码或这些码的乘积。 此外，这些教导适用于任何线性DS-CDMA解调器，例如Rake，Generalized Rake（G-Rake）或码片均衡器，以及采用线性滤波的非线性解调器，例如判决反馈均衡器（DFE）。 有利地，符号特定幅度参考的确定依赖于两个或多个感兴趣符号共有的共享相关估计和/或共享组合权重，从而与使用符号特异性损害相关估计相比显着地减少了处理要求。

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：US07536158B2

公开(公告)日：2009-05-19

申请号：US10811699

申请日：2004-03-29

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

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

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。

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：US20080304554A1

公开(公告)日：2008-12-11

申请号：US12135268

申请日：2008-06-09

申请人： Tracy Fulghum ,  Gregory E. Bottomley ,  Yi-Pin Eric Wang

发明人： Tracy Fulghum ,  Gregory E. Bottomley ,  Yi-Pin Eric Wang

IPC分类号： H04B1/06

CPC分类号： H04L25/03133 ,  H04B1/7103 ,  H04B1/712 ,  H04B17/327 ,  H04B2201/709727

摘要： In one of its aspects, the technology concerns a method of processing a signal which includes physical data channels which have been channelized using spreading codes. The method comprises (1) despreading unoccupied spreading codes (e.g., codes which are essentially unobscured by traffic data) included in the signal to obtain unoccupied code despread values, (2) using the unoccupied code despread values to form an impairment covariance matrix; and (3) using the impairment covariance matrix along with a channel estimate to form a processing parameter. The processing parameter can be one of combining sets and a signal quality estimate. In another of its aspects, the technology concerns a coherent, linear equalizer apparatus configured to process a signal which includes physical data channels which have been channelized using spreading codes. The equalizer apparatus comprises plural delay fingers (32) configured to despread unoccupied spreading codes included in the signal to obtain unoccupied code despread values, and a generator (60) configured to use the unoccupied code despread values to form an impairment covariance matrix.

摘要翻译： 在其一个方面，该技术涉及一种处理信号的方法，该信号包括已经使用扩展码被信道化的物理数据信道。 该方法包括：（1）解扩所述信号中包含的未被占用的扩展码（例如，由业务数据本质上被遮挡的码），以获得未占用的码解扩值，（2）使用未占用的码去扩展值形成损害协方差矩阵; 和（3）使用损伤协方差矩阵以及信道估计来形成处理参数。 处理参数可以是组合集合和信号质量估计之一。 在另一方面，该技术涉及一种相干的线性均衡器装置，其被配置为处理包括已经使用扩展码被信道化的物理数据信道的信号。 均衡器装置包括：多个延迟指（32），被配置为对包括在信号中的未占用的扩展码进行解扩以获得未占用的码去扩展值;以及生成器（60），被配置为使用未占用的码去扩展值来形成损害协方差矩阵。

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。

公开(公告)号：US20080267265A1

公开(公告)日：2008-10-30

申请号：US11739126

申请日：2007-04-24

申请人： Douglas A. Cairns ,  Yi-Pin Eric Wang ,  Gregory E. Bottomley

发明人： Douglas A. Cairns ,  Yi-Pin Eric Wang ,  Gregory E. Bottomley

IPC分类号： H04B1/69

CPC分类号： H04B1/71055 ,  H04B1/7107 ,  H04B2201/709727

摘要： Detecting a symbol of interest comprises despreading a received signal to obtain despread values corresponding to the symbol of interest and to one or more interfering symbols, combining the despread values to generate combined values for the symbol of interest and the interfering symbols, computing spreading waveform correlations between the spreading waveform for the symbol of interest and the spreading waveforms for the interfering symbols, computing interference rejection terms representing the interference present in the combined value for the symbol of interest attributable to the interfering symbols based on the spreading waveform correlations, and generating an estimate of the symbol of interest by combining the combined values with the interference rejection terms. The interference rejection terms are computed by scaling the spreading waveform correlations by corresponding signal powers and compensating the estimates for noise. This provides a robust interference model that avoids numerical problems associated with conventional joint detection.

摘要翻译： 检测感兴趣的符号包括解扩接收信号以获得对应于感兴趣符号的解扩值和一个或多个干扰符号，组合解扩值以产生感兴趣符号和干扰符号的组合值，计算扩展波形相关性 在感兴趣符号的扩展波形和干扰符号的扩展波形之间，基于扩展波形相关性计算代表归因于干扰符号的感兴趣符号的组合值中存在的干扰的干扰抑制项， 通过将组合值与干扰抑制项组合来估计感兴趣的符号。 通过相应的信号功率缩放扩展波形相关性并补偿噪声的估计来计算干扰抑制项。 这提供了一个强大的干扰模型，可以避免与常规关节检测相关的数值问题。