公开(公告)号：US09231651B2

公开(公告)日：2016-01-05

申请号：US14621020

申请日：2015-02-12

Applicant: Telefonaktiebolaget L M Ericsson (publ)

Inventor： Michael Samuel Bebawy ,  Stephen Grant

IPC: H04B1/00 ,  H04B1/712 ,  H04B7/04

CPC classification number: H04B1/712 ,  H04B7/0413 ,  H04B2201/709727

Abstract: A method is disclosed to calculate combining weight vectors associated with a received composite information signal comprising at least one data stream transmitted from at least four antennae. The method starts with computing a parametric estimate of an impairment covariance matrix including at least a first impairment term associated with common pilots deployed by the antennae. The first impairment term captures effects of interferences of the common pilots. The impairment covariance matrix further includes a data covariance term capturing effects of the at least one data stream and an interference term caused at least partially by contribution of thermal noise of receiver branches. The impairment covariance matrix includes a second impairment term associated with at least one dedicated pilot. Then the method computes the combining weight vector using the computed impairment covariance matrix. A network device performs such method is also disclosed.

Abstract translation: 公开了一种计算与包括从至少四个天线发送的至少一个数据流的接收的复合信息信号相关联的加权向量的方法。 该方法开始于计算损伤协方差矩阵的参数估计，其包括与由天线部署的公共飞行员相关联的至少第一损伤项。 第一个减值条件可以看出普通飞行员的干扰效应。 所述损害协方差矩阵还包括捕获所述至少一个数据流的影响的数据协方差项和至少部分地由接收器分支的热噪声的贡献引起的干扰项。 损伤协方差矩阵包括与至少一个专用导频相关联的第二损伤项。 然后该方法使用计算的损伤协方差矩阵计算组合权重向量。 还公开了一种执行这种方法的网络设备。

公开(公告)号：US20150155909A1

公开(公告)日：2015-06-04

申请号：US14621020

申请日：2015-02-12

Applicant: Telefonaktiebolaget L M Ericsson (publ)

Inventor： Michael Samuel Bebawy ,  Stephen Grant

IPC: H04B1/712

CPC classification number: H04B1/712 ,  H04B7/0413 ,  H04B2201/709727

Abstract: A method is disclosed to calculate combining weight vectors associated with a received composite information signal comprising at least one data stream transmitted from at least four antennae. The method starts with computing a parametric estimate of an impairment covariance matrix including at least a first impairment term associated with common pilots deployed by the antennae. The first impairment term captures effects of interferences of the common pilots. The impairment covariance matrix further includes a data covariance term capturing effects of the at least one data stream and an interference term caused at least partially by contribution of thermal noise of receiver branches. The impairment covariance matrix includes a second impairment term associated with at least one dedicated pilot. Then the method computes the combining weight vector using the computed impairment covariance matrix. A network device performs such method is also disclosed.

Abstract translation: 公开了一种计算与包括从至少四个天线发送的至少一个数据流的接收的复合信息信号相关联的加权向量的方法。 该方法开始于计算损伤协方差矩阵的参数估计，其包括与由天线部署的公共飞行员相关联的至少第一损伤项。 第一个减值条件可以看出普通飞行员的干扰效应。 所述损害协方差矩阵还包括捕获所述至少一个数据流的影响的数据协方差项和至少部分地由接收器分支的热噪声的贡献引起的干扰项。 损伤协方差矩阵包括与至少一个专用导频相关联的第二损伤项。 然后该方法使用计算的损伤协方差矩阵计算组合权重向量。 还公开了一种执行这种方法的网络设备。

公开(公告)号：US20150140943A1

公开(公告)日：2015-05-21

申请号：US14607663

申请日：2015-01-28

Applicant: Telefonaktiebolaget LM Ericsson (Publ)

Inventor： Ali S. Khayrallah

IPC: H04B1/30 ,  H04W88/06

CPC classification number: H04B1/30 ,  H04B7/082 ,  H04B7/0822 ,  H04B7/0868 ,  H04B7/0871 ,  H04B7/0874 ,  H04B2201/709727 ,  H04L27/2602 ,  H04L27/2647 ,  H04W88/06

Abstract: A multiple antenna receiver receives a wideband signal containing two or more sub-signals of interest. The receiver may be selectively configured to receive all sub-signals of interest with all antennas, or to receive different sub-signals of interest with different antennas.

Abstract translation: 多天线接收机接收包含两个或更多个感兴趣的子信号的宽带信号。 接收机可以被选择性地配置成用所有天线接收所有感兴趣的子信号，或者用不同的天线接收不同的感兴趣的子信号。

公开(公告)号：US08971386B2

公开(公告)日：2015-03-03

申请号：US14238896

申请日：2011-08-17

Applicant: Henrik Egnell ,  Nina Blom

Inventor： Henrik Egnell ,  Nina Blom

IPC: H04B1/00 ,  H04B1/7117 ,  H04B1/7115 ,  H04B1/712 ,  H04B1/709

CPC classification number: H04B1/7117 ,  H04B1/709 ,  H04B1/7115 ,  H04B1/712 ,  H04B2201/709727

Abstract: The invention relates to the field of radio signal receivers for use in wireless communication networks. In particular to a receiver unit having at least one antenna input for receiving multipath radio signals via a radio unit and at least one antenna from one or more user equipments is provided. The receiver unit comprises: a despreading unit configured to despread a multipath radio signal in the received multipath radio signals using a number of despreading fingers corresponding to a number of delay positions in the multipath radio signal which corresponds to a number of paths in the multipath radio signal, and a combining unit configured to apply at least one weight to the output of each of the number of allocated despreading fingers and combine the weighted outputs into a resulting equalized radio signal. The receiver unit is characterized in that it is configured to calculate auto-correlation values based on all multipath radio signals received at the at least one antenna input, determine at least one auto-correlation value based on the calculated auto-correlation values, determine at least one time value based on the at least one determined auto-correlation value, and allocate at least one interference suppression finger to a delay position in the multipath radio signal based on the at least one determined time value. The invention further relates to a receiver, a network node and a method for suppressing interference in a received multipath radio signal in a receiver unit.

Abstract translation: 本发明涉及用于无线通信网络的无线电信号接收机领域。 特别涉及一种具有至少一个天线输入的接收机单元，用于经由无线电单元接收多径无线电信号，并提供来自一个或多个用户设备的至少一个天线。 接收机单元包括：解扩单元，被配置为使用与多径无线电信号中的多个延迟位置相对应的多个解扩手指来解扩所接收的多路径无线电信号中的多路径无线电信号，该多路径无线电信号对应于多路径无线电 信号和组合单元，其被配置为将至少一个权重应用于所分配的解扩手指数中的每一个的输出，并将加权输出组合成所得到的均衡无线电信号。 接收机单元的特征在于，其被配置为基于在至少一个天线输入处接收的所有多径无线电信号来计算自相关值，基于所计算的自相关值确定至少一个自相关值， 基于所述至少一个确定的自相关值的至少一个时间值，并且基于所述至少一个确定的时间值，将至少一个干扰抑制手指分配给所述多径无线电信号中的延迟位置。 本发明还涉及一种接收机，网络节点和一种用于抑制接收机单元中接收到的多路径无线电信号中的干扰的方法。

公开(公告)号：US08964912B2

公开(公告)日：2015-02-24

申请号：US11219183

申请日：2005-09-02

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

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

IPC: H04B1/10 ,  H04B1/712 ,  H04B1/7117

CPC classification number: H04B1/712 ,  H04B1/7117 ,  H04B2201/709727

Abstract: A method and apparatus for determining operating modes in a receiver is described herein. A delay searcher in the receiver detects a signal image in the received signal. When the receiver is a RAKE receiver, a plurality of RAKE fingers coherently combine time-shifted versions of the received signal at different delays. Alternatively, when the receiver is a chip equalization receiver, an FIR filter coherently pre-combines the signal images in the received signal. A processor determines delays. In particular, the processor generates a first signal quality metric for a single-delay receiver mode, and generates a second signal quality metric for a multi-delay receiver mode. Based on a comparison of the first and second signal quality metrics, the processor selects the single-delay or the multi-delay receiver mode for processing the signal image.

Abstract translation: 本文描述了用于确定接收机中的操作模式的方法和装置。 接收机中的延迟搜索器检测接收信号中的信号图像。 当接收机是RAKE接收机时，多个RAKE指头以不同的延迟相干地组合接收信号的时移版本。 或者，当接收机是芯片均衡接收机时，FIR滤波器相干地预组合接收信号中的信号图像。 处理器确定延迟。 特别地，处理器为单延迟接收器模式产生第一信号质量度量，并且产生用于多延迟接收器模式的第二信号质量度量。 基于第一和第二信号质量度量的比较，处理器选择用于处理信号图像的单延迟或多延迟接收器模式。

公开(公告)号：US08934521B2

公开(公告)日：2015-01-13

申请号：US13927199

申请日：2013-06-26

Applicant: Telefonaktiebolaget L M Ericsson (publ)

Inventor： Anders Wallén

IPC: H04B1/00

CPC classification number: H04B1/10 ,  H04B2201/709727 ,  H04L1/20 ,  H04L2027/0065

Abstract: A receiver circuit provides improved noise estimation processing by at least partially removing receiver frequency error bias. An initial noise estimate is compensated using an error term based on the observed receiver frequency error, and the resulting compensated noise estimate can be used to improve other signal processing in the receiver. For example, the receiver may use compensated noise estimates to generate signal quality estimates, e.g., Signal-to-Interference (SIR) estimates, having improved accuracy. Additionally, or alternatively, the receiver may use the compensated noise estimates to generate RAKE combining weights having improved noise suppression characteristics. In an exemplary embodiment, the initial noise estimate is a noise correlation matrix generated from a received reference signal, e.g., pilot symbols, and the error term is an error matrix directly generated using the observed receiver frequency error and channel estimates taken from the reference signal.

Abstract translation: 接收机电路通过至少部分地去除接收机频率误差偏差来提供改进的噪声估计处理。 使用基于观察到的接收机频率误差的误差项来补偿初始噪声估计，并且所得到的补偿噪声估计可以用于改善接收机中的其他信号处理。 例如，接收机可以使用经补偿的噪声估计来产生具有提高的精度的信号质量估计，例如信号干扰（SIR）估计。 另外或替代地，接收机可以使用经补偿的噪声估计来生成具有改进的噪声抑制特性的RAKE组合权重。 在示例性实施例中，初始噪声估计是从接收的参考信号（例如，导频符号）产生的噪声相关矩阵，并且误差项是使用观测到的接收机频率误差和从参考信号获取的信道估计直接生成的误差矩阵 。

公开(公告)号：US08867676B2

公开(公告)日：2014-10-21

申请号：US10943720

申请日：2004-09-17

Applicant: Douglas A. Cairns

Inventor： Douglas A. Cairns

IPC: H03D1/04 ,  H04L25/03 ,  H04B1/7097

CPC classification number: H04L25/03006 ,  H04B1/7097 ,  H04B2201/709727 ,  H04L2025/03535

Abstract: A wireless communication receiver is configured to suppress interference with respect to a received signal of interest on a selective basis responsive to evaluating whether the receiver currently is or is not operating in a colored noise/interference environment. For example, an exemplary Code Division Multiple Access (CDMA) mobile station activates or deactivates interference suppression responsive to determining and evaluating an orthogonality factor, which, in this context, serves as a measure of how much downlink power gets converted into same-cell interference via multipath propagation. The orthogonality factor thus serves as an indicator of noise plus interference coloration. In one or more exemplary embodiments, then, an exemplary receiver circuit is configured to determine the orthogonality factor, evaluate it, and selectively enable or disable received signal whitening based on that evaluation. The exemplary receiver circuit and associated selective whitening method can be applied to various receiver architectures and signal types.

Abstract translation: 响应于评估接收机当前是否在彩色噪声/干扰环境中操作，无线通信接收机被配置为基于选择性来抑制关于所接收的感兴趣信号的干扰。 例如，示例性码分多址（CDMA）移动站响应于确定和评估正交因子而激活或去激活干扰抑制，在正交性因子中，其在下文中用作下载功率被转换成相同小区干扰的量度 通过多径传播。 因此，正交因子用作噪声加干扰着色的指标。 在一个或多个示例性实施例中，然后，示例性接收机电路被配置为确定正交因子，评估它，以及基于该评估选择性地启用或禁用接收信号白化。 示例性的接收机电路和相关的选择性白化方法可以应用于各种接收机架构和信号类型。

公开(公告)号：US20140204983A1

公开(公告)日：2014-07-24

申请号：US13747442

申请日：2013-01-22

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)

Inventor： Michael Samuel Bebawy ,  Stephen Grant

IPC: H04B1/712

CPC classification number: H04B1/712 ,  H04B7/0413 ,  H04B2201/709727

Abstract: A method of calculating combining weight vectors associated with a received composite information signal comprising at least one data stream transmitted from at least a first antenna and a second antenna is disclosed. The method starts with computing a parametric estimate of an impairment covariance matrix including at least a first impairment term associated with common pilots deployed by the first antenna and the second antenna respectively. The first impairment term captures effects of interferences between the common pilots, in addition to effects of interferences caused by each common pilot singly. The impairment covariance matrix further includes a data covariance term capturing effects of the at least one data stream and an interference term caused at least partially by contribution of thermal noise of receiver branches. Then the method computes the combining weight vector using the computed impairment covariance matrix.

Abstract translation: 公开了一种计算与包括从至少第一天线和第二天线发送的至少一个数据流的接收的复合信息信号相关联的加权矢量的方法。 该方法开始于计算损伤协方差矩阵的参数估计，该损伤协方差矩阵包括至少第一损伤项，分别由第一天线和第二天线部署的公共导频相关联。 第一个损伤条件除了每个共同飞行员单独造成的干扰影响之外，还可以捕捉到共同飞行员之间干扰的影响。 所述损害协方差矩阵还包括捕获所述至少一个数据流的影响的数据协方差项和至少部分地由接收器分支的热噪声的贡献引起的干扰项。 然后该方法使用计算的损伤协方差矩阵计算组合权重向量。

公开(公告)号：US08787426B2

公开(公告)日：2014-07-22

申请号：US13333703

申请日：2011-12-21

Applicant: Yi-Pin Eric Wang ,  Stephen Grant ,  Ning He ,  Niklas Johansson

Inventor： Yi-Pin Eric Wang ,  Stephen Grant ,  Ning He ,  Niklas Johansson

IPC: H04B1/00

CPC classification number: H04B1/7107 ,  H04B1/7115 ,  H04B2201/709727 ,  H04B2201/709745

Abstract: In a receive node of a wireless network, an iterative multi-user multi-stage interference cancellation receiver is used. After each stage of interference cancellation, interference characteristics change. An adaptive finger placement strategy is used in which after each stage of interference cancellation, finger delays and combining weights of the receiver are adapted to reflect the changed interference characteristics.

Abstract translation: 在无线网络的接收节点中，使用迭代多用户多级干扰消除接收机。 在干扰消除的每个阶段之后，干扰特性发生变化。 使用自适应手指放置策略，其中在干扰消除的每个阶段之后，接收机的手指延迟和组合权重适于反映改变的干扰特性。

公开(公告)号：US08576960B2

公开(公告)日：2013-11-05

申请号：US12628341

申请日：2009-12-01

Applicant: Douglas A. Cairns ,  Gregory E. Bottomley ,  Elias Jonsson

Inventor： Douglas A. Cairns ,  Gregory E. Bottomley ,  Elias Jonsson

IPC: H04L27/06 ,  H04L23/02

CPC classification number: H04L25/03006 ,  H04B1/71057 ,  H04B2201/709727 ,  H04L25/03178 ,  H04L25/03203 ,  H04L25/03331 ,  H04L2025/03426

Abstract: The computation of code-specific channel matrices for an Assisted Maximum Likelihood Detection (AMLD) receiver comprises separately computing high rate matrices that change each symbol period, and a low rate matrix that is substantially constant over a plurality of symbol periods. The high and low rate matrices are combined to generate a code-specific channel matrix for each receiver stage. The high rate matrices include scrambling and spreading code information, and the low rate matrices include information on the net channel response and combining weights. The low rate matrices are efficiently computed by a linear convolution in the frequency domain of the net channel response and combining weights (with zero padding to avoid circular convolution), then transforming the convolution to the time domain and extracting matrix elements. Where the combining weights are constant across stages, a common code-specific channel matrix may be computed and used in multiple AMLD receiver stages.

Abstract translation: 用于辅助最大似然检测（AMLD）接收机的代码特定信道矩阵的计算包括分别计算改变每个符号周期的高速率矩阵和在多个符号周期上基本上恒定的低速率矩阵。 组合高速和低速率矩阵以为每个接收机级生成代码特定的信道矩阵。 高速率矩阵包括加扰和扩展码信息，低速率矩阵包括关于网络信道响应和组合权重的信息。 低速率矩阵通过网络通道响应的频域中的线性卷积和组合权重（零填充以避免循环卷积）有效地计算，然后将卷积变换到时域并提取矩阵元素。 在组合权重跨越阶段恒定的情况下，可以在多个AMLD接收机阶段中计算和使用公共的特定码通道矩阵。