公开(公告)号：WO2010119031A1

公开(公告)日：2010-10-21

申请号：PCT/EP2010/054816

申请日：2010-04-13

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (publ) ,  JONSSON, Elias

Inventor： JONSSON, Elias

IPC: H04B1/707

CPC classification number: H04B1/712 ,  H04B2201/709727

Abstract: According to the teachings disclosed in this document, a receiver estimates impairment correlations for a received signal using received pilot values. This direct estimation of impairment correlations based on direct pilot observations, provides for a rich capture of all impairment sources bearing on the received signal. Advantageously, however, estimation noise is reduced by generating a structured covariance matrix (106)- from the measured covariance matrix (102), and carrying out structured filtering within the structured covariance matrix (108). Structured filtering involves averaging matrix elements that correspond to the same processing delay difference as used for measured impairment correlation estimation. In one or more embodiments, averaged net channel estimates are used to obtain a rank one matrix (104), which is used to convert a measured covariance matrix to a structured covariance matrix, for carrying out structured filtering.

Abstract translation: 根据本文件中公开的教导，接收机使用接收到的导频值来估计接收信号的损害相关性。 这种基于直接导频观测的损伤相关性的直接估计提供了对接收信号的所有损伤来源的丰富捕获。 然而，有利地，通过从所测量的协方差矩阵（102）生成结构化协方差矩阵（106）并且在结构化协方差矩阵（108）内执行结构化过滤来减小估计噪声。 结构化滤波涉及平均矩阵元素，其对应于用于测量的损害相关估计的相同的处理延迟差。 在一个或多个实施例中，使用平均净信道估计来获得秩一矩阵（104），其用于将测量的协方差矩阵转换为结构化协方差矩阵，以执行结构化过滤。

公开(公告)号：WO2008104466A3

公开(公告)日：2008-11-27

申请号：PCT/EP2008051887

申请日：2008-02-15

Applicant: ERICSSON TELEFON AB L M ,  JONSSON ELIAS ,  REIAL ANDRES

Inventor： JONSSON ELIAS ,  REIAL ANDRES

IPC: H04B1/707 ,  H04B7/08

CPC classification number: H04W72/12 ,  H04B1/7103 ,  H04B1/712 ,  H04B7/0615 ,  H04B7/0669 ,  H04B7/0697 ,  H04B2201/70701 ,  H04B2201/709727 ,  Y02D70/00 ,  Y02D70/40 ,  Y02D70/444

Abstract: The teachings herein disclose methods and apparatus that simplify impairment correlation estimation for received signal processing, based on determining, for any given processing interval, which impairment contributors should be considered in the estimation of overall received signal impairment correlations. These simplifications reduce computational processing requirements, allowing reduced circuit complexity and/or reduced operating power, and improve receiver performance. A corresponding transmitter and transmission method include transmitting multiple information streams to targeted receivers according to ongoing scheduling, and controlling the ongoing scheduling to reduce the number of impairment contributors considered in impairment correlation estimation at the targeted receivers. In one embodiment, a receiver identifies which impairment contributors to consider based on receiving control information. In another embodiment, the receiver identifies the impairment contributors to consider based on background processing, e.g., background determination of parametric model fitting parameters for a plurality of impairment contributors, and observing those model fitting parameters over time.

Abstract translation: 本文的教导公开了基于对于任何给定的处理间隔确定在整体接收信号损害相关性的估计中应该考虑哪些减值贡献者来简化接收信号处理的损害相关性估计的方法和设备。 这些简化降低了计算处理要求，从而降低了电路复杂性和/或降低了工作功率，并提高了接收器的性能。 相应的发射机和传输方法包括根据正在进行的调度将多个信息流传输到目标接收机，并且控制正在进行的调度以减少目标接收机处的减损相关性估计中考虑的减值贡献者的数量。 在一个实施例中，接收者基于接收控制信息来识别要考虑哪些减值贡献者。 在另一个实施例中，接收机基于背景处理识别要考虑的减值贡献者，例如，多个减值贡献者的参数模型拟合参数的背景确定，以及随时间观察那些模型拟合参数。

公开(公告)号：WO2007025749A2

公开(公告)日：2007-03-08

申请号：PCT/EP2006/008514

申请日：2006-08-31

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (publ) ,  JONSSON, Elias ,  MYREHED, Mårten

Inventor： JONSSON, Elias ,  MYREHED, Mårten

IPC: H04B1/707

CPC classification number: H04B1/7113 ,  H04B1/7117 ,  H04B2201/70702 ,  H04B2201/70707 ,  H04B2201/709727

Abstract: Multipath components of transmitted data symbols are received with individual delays and processed by a RAKE having a number of fingers. A delay profile (31 ) indicating magnitudes for a first number of delay values is provided. Estimated magnitudes for a second number of delay values located between the first number of delay values are calculated by interpolation, and a combined delay profile (32) is provided by combining the magnitudes for the first and second number of delay values. Delay values for peaks in the combined delay profile are determined, and a number of peak delay values (P 1 , P 2 , P) comprising the largest peak are selected from the combined delay profile. At least some of the selected peak delay values are provided to the RAKE and assigned to the fingers. This allows a reduction of current consumption and dye area, while still providing delay values with sufficient resolution for the RAKE.

Abstract translation: 所传输的数据符号的多路径分量被接收具有单独的延迟并由具有多个指状物的RAKE处理。 提供了指示第一数量的延迟值的幅度的延迟曲线（31）。 通过内插计算位于第一数量的延迟值之间的第二数量的延迟值的估计幅度，并且通过组合第一和第二数量的延迟值的幅度来提供组合的延迟分布（32）。 确定组合延迟分布中的峰值的延迟值，并且包括最大峰值的峰值延迟值（P 1 SUB，P 2，P）的数目从 组合延迟轮廓。 所选择的峰值延迟值中的至少一些被提供给RAKE并被分配给手指。 这允许减少电流消耗和染色面积，同时仍然为RAKE提供足够的分辨率的延迟值。

公开(公告)号：WO2005096517A1

公开(公告)日：2005-10-13

申请号：PCT/EP2005/002419

申请日：2005-03-08

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (publ) ,  CAIRNS, Douglas, A. ,  BOTTOMLEY, Gregory, E. ,  WANG, Yi-Pin, Eric ,  FULGHUM, Tracy ,  JONSSON, Elias

Inventor： CAIRNS, Douglas, A. ,  BOTTOMLEY, Gregory, E. ,  WANG, Yi-Pin, Eric ,  FULGHUM, Tracy ,  JONSSON, Elias

IPC: H04B1/707

CPC classification number: H04B1/712 ,  H04B1/7103 ,  H04B2201/709727

Abstract: Exemplary received signal processing may be based on maintaining a model of received signal impairment correlations, wherein each term. of the model is updated periodically or as needed based on measuring impairments for a received signal of interest. An exemplary model comprises an interference impairment term scaled by a first model fitting parameter, and a noise impairment term scaled by a second model fitting parameters. The model terms may be maintained based on current channel estimates and delay information and may be fitted to measured impairment by adapting the model fitting parameters.based on the measured impairment. The modeled received signal impairment correlations may be used to compute RAKE combining weights for received signal processing, or to compute Signal-to-Interference (SIR) estimates. Combined or separate models may be used for multiple received signals. As such, the exemplary modeling is extended to soft handoff, multiple antennas, and other diversity situations.

Abstract translation: 示例性的接收信号处理可以基于维持接收信号损害相关的模型，其中每个项。 根据感兴趣的接收信号的测量损伤，周期性地或根据需要更新模型。 示例性模型包括由第一模型拟合参数缩放的干扰损害项和由第二模型拟合参数缩放的噪声损伤项。 模型条款可以根据当前渠道估计和延迟信息进行维护，并且可以通过根据测量的损失调整模型拟合参数来拟合测量的损失。 建模的接收信号损害相关可用于计算接收信号处理的RAKE组合权重，或用于计算信号与干扰（SIR）估计。 组合或分离的模型可用于多个接收信号。 因此，示例性建模被扩展到软切换，多个天线和其他分集情况。

公开(公告)号：WO2005020458A1

公开(公告)日：2005-03-03

申请号：PCT/EP2004/007626

申请日：2004-07-10

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (publ) ,  JONSSON, Elias ,  PERSSON, Roger

Inventor： JONSSON, Elias ,  PERSSON, Roger

IPC: H04B1/707

CPC classification number: H04B1/70754 ,  H04B1/70735 ,  H04B1/7113 ,  H04B1/7117 ,  H04B2201/70702

Abstract: Multipath components of signals transmitted through time-varying digital radio channels are received with individual delays, and signals through a given channel comprise a code identifying that channel. A delay profile indicating a magnitude (Y) for delay values in a search window is calculated repetitively for known channels; the delays of multipath components for known channels estimated; a signal strength indicator calculated; and a search for new multipath components not already estimated performed at regular time intervals. When a new multipath component is found, its identification code is compared to the codes of the known channels. If the code of the new component is identical to the code of a known channel, a delay profile and a signal strength indicator is calculated for a window transposed to include the new multipath component. In this way as many multipath components as possible are included in the search window for a new cell.

Abstract translation: 通过时变数字无线电信道发送的信号的多径分量被接收具有单独的延迟，并且通过给定信道的信号包括识别该信道的码。 对已知通道重复地计算指示搜索窗口中的延迟值的幅度（Y）的延迟分布; 估计已知信道的多路径分量的延迟; 计算信号强度指标; 并搜索未定时执行的新的多径分量。 当找到新的多径分量时，将其识别码与已知信道的码进行比较。 如果新组件的代码与已知通道的代码相同，则为转置以包括新的多路径分量的窗口计算延迟分布和信号强度指示符。 以这种方式，尽可能多的多径分量被包括在新单元的搜索窗口中。

公开(公告)号：WO2010112414A1

公开(公告)日：2010-10-07

申请号：PCT/EP2010/053977

申请日：2010-03-26

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  JONSSON, Elias ,  DANIELSSON, Niclas

Inventor： JONSSON, Elias ,  DANIELSSON, Niclas

IPC: H03G3/20 ,  H03G3/30

CPC classification number: H03G3/3078 ,  H03G3/3068

Abstract: Methods and apparatus for providing automatic gain control (AGC) for received multi-carrier signals are disclosed. A receiver circuit comprises a common analog signal path, which includes an analog variable-gain circuit and an analog-to-digital converter, and further comprises first and second carrier-specific, digital variable-gain circuits corresponding to first and second carriers of the received multi-carrier signal, respectively. The receiver circuit further includes a gain control circuit configured to control the analog and digital variable- gain circuits and to allot gain adjustments to the analog variable-gain circuit based on a difference between carrier signal levels for the first and second carriers. In some embodiments, the gain control circuit selectively operates in an all-carrier mode, in which analog gain adjustments are calculated from both of the carrier signal levels, or in an unequal-priority mode, in which analog gain adjustments are calculated from only one of the first and second carrier signal levels.

Abstract translation: 公开了用于为接收的多载波信号提供自动增益控制（AGC）的方法和装置。 接收器电路包括公共模拟信号路径，其包括模拟可变增益电路和模数转换器，并且还包括对应于第一和第二载波的第一和第二载波特定的数字可变增益电路 分别接收多载波信号。 接收器电路还包括增益控制电路，其被配置为基于第一载波和第二载波的载波信号电平之间的差异来控制模拟和数字可变增益电路并且向模拟可变增益电路分配增益调整。 在一些实施例中，增益控制电路选择性地以全载波模式操作，其中从两个载波信号电平或不等优先级模式计算模拟增益调整，其中仅从一个模式增益调整 的第一和第二载波信号电平。

公开(公告)号：WO2010097380A1

公开(公告)日：2010-09-02

申请号：PCT/EP2010/052261

申请日：2010-02-23

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  CEDERGREN, Andreas ,  JONSSON, Elias

Inventor： CEDERGREN, Andreas ,  JONSSON, Elias

IPC: H04B7/04

CPC classification number: H04B7/0413

Abstract: Methods and apparatus for processing a received multi-stream (MIMO) signal, and in particular for estimating a per-code traffic-channel-to-pilot power ratio for the MIMO signal are disclosed. An exemplary method includes the calculation of an average symbol amplitude or average symbol power level from a plurality of de-spread traffic channel symbols received in a first transmission slot and the estimation of a corresponding pilot symbol amplitude or pilot symbol power level, based on an estimated propagation channel response and at least one of a plurality of precoding vectors used to generate the MIMO signal. A per-code traffic-channel-to-pilot power ratio for the first transmission slot is computed by dividing the average symbol amplitude or average symbol power level by the corresponding pilot symbol amplitude or pilot symbol power level.

Abstract translation: 公开了用于处理接收的多流（MIMO）信号的方法和装置，特别是用于估计MIMO信号的每代码业务信道到导频功率比的方法和装置。 一种示例性方法包括：基于在第一传输时隙中接收的多个解扩业务信道符号中的平均符号幅度或平均符号功率电平的计算，以及相应导频符号幅度或导频符号功率电平的估计， 估计的传播信道响应以及用于生成MIMO信号的多个预编码矢量中的至少一个。 通过将平均符号幅度或平均符号功率电平除以相应的导频符号幅度或导频符号功率电平来计算用于第一传输时隙的每代码业务信道到导频功率比。

公开(公告)号：WO2008145337A3

公开(公告)日：2008-12-04

申请号：PCT/EP2008/004196

申请日：2008-05-27

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  JONSSON, Elias

Inventor： JONSSON, Elias

IPC: H04L5/02 ,  H04L27/26

Abstract: In an OFDM communications system receiver, channel estimates are processed to remove or reduce noise, exploiting the orthogonality of pilot patterns. The de-noised channel estimates are then used to compute inter-cell interference. The noise effects of orthogonal pilot patterns are selectively removed from channel samples in estimating inter-cell interference, depending on whether data subcarriers are subject to the same interference as pilot subcarriers, and whether data subcarriers are subject to interference from sectors with pilot patterns orthogonal to those in the transmitting sector. A further calculation removes noise from cells not identified by an orthogonal pilot sequence, which may be particularly applicable when large variations exist in the frequency domain of the propagation channel across a pilot pattern.

公开(公告)号：WO2008145337A2

公开(公告)日：2008-12-04

申请号：PCT/EP2008004196

申请日：2008-05-27

Applicant: ERICSSON TELEFON AB L M ,  JONSSON ELIAS

Inventor： JONSSON ELIAS

IPC: H04L5/02 ,  H04L27/26

CPC classification number: H04L27/2647 ,  H04L5/023 ,  H04L25/0206 ,  H04L25/0228 ,  H04L27/261

Abstract: In an OFDM communications system receiver, channel estimates are processed to remove or reduce noise, exploiting the orthogonality of pilot patterns. The de-noised channel estimates are then used to compute inter-cell interference. The noise effects of orthogonal pilot patterns are selectively removed from channel samples in estimating inter-cell interference, depending on whether data subcarriers are subject to the same interference as pilot subcarriers, and whether data subcarriers are subject to interference from sectors with pilot patterns orthogonal to those in the transmitting sector. A further calculation removes noise from cells not identified by an orthogonal pilot sequence, which may be particularly applicable when large variations exist in the frequency domain of the propagation channel across a pilot pattern.

Abstract translation: 在OFDM通信系统接收机中，处理信道估计以消除或减少噪声，利用导频模式的正交性。 然后使用去噪信道估计来计算小区间干扰。 取决于数据副载波是否受到与导频子载波相同的干扰，以及数据副载波是否受到来自与导频模式正交的导频模式的扇区的干扰，从而在估计小区间干扰中从信道样本中选择性地去除正交导频模式的噪声影响 那些在传输部门。 进一步的计算消除了未被正交导频序列识别的小区的噪声，当通过导频模式的传播信道的频域存在大的变化时，这可能特别适用。

公开(公告)号：WO2008118064A3

公开(公告)日：2008-10-02

申请号：PCT/SE2008/050032

申请日：2008-01-11

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) ,  JADING, Ylva ,  JONSSON, Elias ,  PARKVALL, Stefan ,  DAHLMAN, Erik

Inventor： JADING, Ylva ,  JONSSON, Elias ,  PARKVALL, Stefan ,  DAHLMAN, Erik

IPC: H04L27/26

Abstract: A network unit of an own cell is operated in a radio communication system utilizing a radio interface that includes a radio frame made up of a number of sub-frames. The own cell serves one or more user equipments. Operation includes obtaining information about a scheduling of MBSFN data transmissions in one or more neighboring cells. The information thereby obtained is used to generate an information signal that, for a given sub-frame, enables the one or more user equipments to determine whether neighboring cell measurements can be performed using a unicast group of Orthogonal Frequency Division Multiple access (OFDM) symbols. The information signal is transmitted to the one or more user equipments, which can then use the information to determine how to locate cell-specific reference symbols when doing measurements of neighboring cells.

Abstract translation: 在使用包括由多个子帧组成的无线电帧的无线电接口的无线电通信系统中操作本小区的网络单元。 自己的小区服务于一个或多个用户设备。 操作包括获得关于一个或多个相邻小区中的MBSFN数据传输的调度的信息。 由此获得的信息被用于生成信息信号，该信息信号对于给定的子帧使得一个或多个用户设备能够确定是否可以使用正交频分多址（OFDM）符号的单播组来执行邻近小区测量 。 信息信号被发送到一个或多个用户设备，随后可以使用该信息来确定在进行相邻小区的测量时如何定位小区特定的参考符号。