公开(公告)号：EP2119079A4

公开(公告)日：2013-01-16

申请号：EP07748397

申请日：2007-04-12

Applicant: ERICSSON TELEFON AB L M

Inventor： RAMESH RAJARAM ,  CHENG JUNG-FU ,  KOORAPATY HAVISH ,  BOTTOMLEY GREGORY

IPC: H04W4/18 ,  H04W28/04 ,  H04W48/08 ,  H04W72/00 ,  H04W72/04

CPC classification number: H04W72/0406 ,  H04B2201/709727 ,  H04W4/18 ,  H04W48/08 ,  H04W72/082

公开(公告)号：EP2761766A4

公开(公告)日：2015-07-15

申请号：EP12835544

申请日：2012-09-27

Applicant: ERICSSON TELEFON AB L M

Inventor： WANG YI-PIN ERIC ,  GRANT STEPHEN ,  HE NING ,  JOHANSSON NIKLAS ,  CHENG JUNG-FU ,  KONUSKAN CAGATAY ,  BOTTOMLEY GREGORY

IPC: H04B1/7107 ,  H04B1/712

CPC classification number: H04W72/1278 ,  H04B1/7107 ,  H04B1/71075 ,  H04B1/712 ,  H04W72/082

公开(公告)号：EP2070201A4

公开(公告)日：2014-04-09

申请号：EP07769059

申请日：2007-07-09

Applicant: ERICSSON TELEFON AB L M

Inventor： BOTTOMLEY GREGORY ,  COZZO CARMELA

IPC: H04L25/02

CPC classification number: H04L25/0242 ,  H04B1/712 ,  H04B2201/709727 ,  H04L25/0228

Abstract: Channel response and impairment correlation estimates are iteratively determined. According to one embodiment of performing channel estimation for use in received signal processing, a channel response estimate is calculated based on an initial impairment correlations estimate and a measured channel response derived from a received signal. A revised impairment correlations estimate is calculated using a parametric approach based on the channel response estimate and the channel response estimate is recalculated based on the revised impairment correlations estimate. According to one embodiment of a wireless communication device, the device comprises a parameter estimation unit configured to iteratively calculate a medium channel response estimate based on a parametric impairment correlations estimate and a measured net channel response derived from a received signal. The wireless communication device also comprises circuitry configured to control how many times the parameter estimation unit calculates the medium channel response estimate.

公开(公告)号：WO2013048326A3

公开(公告)日：2013-07-18

申请号：PCT/SE2012051032

申请日：2012-09-27

Applicant: ERICSSON TELEFON AB L M

Inventor： WANG YI-PIN ERIC YI-PIN ERIC ,  GRANT STEPHEN ,  HE NING ,  JOHANSSON NIKLAS ,  CHENG JUNG-FU ,  KONUSKAN CAGATAY ,  BOTTOMLEY GREGORY

IPC: H04B1/7107 ,  H04B1/7097 ,  H04L1/00

CPC classification number: H04W72/1278 ,  H04B1/7107 ,  H04B1/71075 ,  H04B1/712 ,  H04W72/082

Abstract: In a receive node (230) of a wireless network (100), an iterative multi-user multi-stage interference cancellation receiver (400, 800, 1100) is used. After each stage of interference cancellation, interference characteristics change. An adaptive strategy is used in which after each stage of interference cancellation, impairment covariance is parametrically updated and combining weights of the receiver (400, 800, 1100) are adapted to reflect the updated impairment covariance.

Abstract translation: 在无线网络（100）的接收节点（230）中，使用迭代多用户多级干扰消除接收机（400,800,1100）。 在干扰消除的每个阶段之后，干扰特性发生变化。 使用自适应策略，其中在干扰消除的每个阶段之后，参考地更新损害协方差，并且接收器的组合权重（400,800,1100）适于反映更新的损害协方差。

公开(公告)号：WO0229978A3

公开(公告)日：2002-12-12

申请号：PCT/EP0111430

申请日：2001-10-04

Applicant: ERICSSON TELEFON AB L M ,  DENT PAUL ,  BOTTOMLEY GREGORY ,  ATARIUS ROOZBEH

Inventor： DENT PAUL ,  BOTTOMLEY GREGORY ,  ATARIUS ROOZBEH

IPC: H04B1/7087 ,  H04B1/712 ,  H04L27/00 ,  H04B1/707

CPC classification number: H04B1/7087 ,  H04B1/712 ,  H04L2027/0055 ,  H04L2027/0093

Abstract: A frequency offset is estimated between at least one frequency of at least one transmitter and a local reference frequency of a receiver. Received signals are processed using the local frequency reference oscillator to obtain representative complex numerical samples which are correlated with shifts of a locally generated despreading code to produce a number of complex channel estimates, each corresponding to a different delayed ray of the multipath propagation channel. A frequency error estimate is computed for each ray based on successive values of a respective one of the channel estimates. A weighted summation is formed of the frequency error estimate to provide a relative frequency error estimate to control the local frequency reference.

Abstract translation: 在至少一个发射机的至少一个频率和接收机的本地参考频率之间估计频率偏移。 使用本地频率参考振荡器处理接收信号，以获得代表性的复数值样本，其与本地生成的解扩展码的移位相关，以产生多个复信道估计，每个对应于多径传播信道的不同延迟的射线。 基于信道估计的相应一个的连续值，为每个射线计算频率误差估计。 加权求和由频率误差估计形成，以提供相对频率误差估计来控制本地频率参考。

公开(公告)号：WO2008041917A3

公开(公告)日：2008-05-22

申请号：PCT/SE2007050513

申请日：2007-07-09

Applicant: ERICSSON TELEFON AB L M

Inventor： BOTTOMLEY GREGORY ,  COZZO CARMELA

IPC: H04B1/707 ,  H04L25/02

CPC classification number: H04L25/0242 ,  H04B1/712 ,  H04B2201/709727 ,  H04L25/0228

Abstract: Channel response and impairment correlation estimates are iteratively determined. According to one embodiment of performing channel estimation for use in received signal processing, a channel response estimate is calculated based on an initial impairment correlations estimate and a measured channel response derived from a received signal. A revised impairment correlations estimate is calculated using a parametric approach based on the channel response estimate and the channel response estimate is recalculated based on the revised impairment correlations estimate. According to one embodiment of a wireless communication device, the device comprises a parameter estimation unit configured to iteratively calculate a medium channel response estimate based on a parametric impairment correlations estimate and a measured net channel response derived from a received signal. The wireless communication device also comprises circuitry configured to control how many times the parameter estimation unit calculates the medium channel response estimate.

Abstract translation: 迭代确定信道响应和损害相关估计。 根据对在接收信号处理中使用的信道估计的一个实施例，基于初始损害相关估计和从接收信号导出的测量信道响应来计算信道响应估计。 使用基于信道响应估计的参数方法来计算修正的损害相关估计，并且基于修正的损害相关估计重新计算信道响应估计。 根据无线通信设备的一个实施例，该设备包括参数估计单元，该参数估计单元被配置为基于参数损害相关估计和从接收到的信号导出的测量的净信道响应来迭代地计算介质信道响应估计。 无线通信设备还包括被配置为控制参数估计单元计算媒体信道响应估计的次数的电路。

公开(公告)号：WO2004093333A3

公开(公告)日：2004-12-02

申请号：PCT/US2004010561

申请日：2004-04-06

Applicant: ERICSSON TELEFON AB L M ,  BOTTOMLEY GREGORY ,  WANG YI-PIN ERIC ,  CHENG JUNG-FU ,  GRANT STEPHEN

Inventor： BOTTOMLEY GREGORY ,  WANG YI-PIN ERIC ,  CHENG JUNG-FU ,  GRANT STEPHEN

IPC: H04B1/707 ,  H04J13/00 ,  H04L25/03

CPC classification number: H04B1/7105 ,  H04B1/709 ,  H04B1/712 ,  H04L25/03171 ,  H04L25/03331

Abstract: A CDMA communication system uses a RAKE receiver, a code correlator and a multi-code joint detector to jointly detect symbols in two or more received signals contained within a composite signal. The RAKE receiver separates the composite signal into two or more RAKE output signals by despreading the composite signal using selected spreading codes. The multi-code joint detector jointly detects the symbols in the received signals using the RAKE receiver output signals, cross-correlations between the spreading codes generated by the code correlator, and RAKE combining weights based on a noise covariance matrix. The multi-code joint detector also includes a trellis that represents possible states and state transitions and a branch metric calculator for calculating branch metrics associated with the state transitions based on the RAKE receiver output signals and the cross-correlations between the spreading codes.

Abstract translation: CDMA通信系统使用RAKE接收机，码相关器和多码联合检测器来联合检测包含在复合信号内的两个或更多接收信号中的码元。 瑞克接收机通过使用选定的扩频码对复合信号进行解扩来将复合信号分离成两个或更多瑞克输出信号。 多码联合检测器使用RAKE接收机输出信号，由码相关器产生的扩展码之间的互相关以及基于噪声协方差矩阵的RAKE组合权重联合检测接收信号中的码元。 多码联合检测器还包括表示可能的状态和状态转换的网格，以及分支度量计算器，用于基于RAKE接收器输出信号和扩展码之间的互相关来计算与状态转换相关联的分支度量。

公开(公告)号：AT477531T

公开(公告)日：2010-08-15

申请号：AT07711503

申请日：2007-02-07

Applicant: ERICSSON TELEFON AB L M

Inventor： WANG YI-PIN ERIC ,  BOTTOMLEY GREGORY ,  REIAL ANDRES

IPC: G06F7/544

Abstract: A method and corresponding circuit for determining a final result for a desired series of multiply-and-accumulate (MAC) operations are based on counting the occurrence of products in the desired series of MAC operations, multiplying the counts by their corresponding products to obtain partial sums, and adding the partial sums to obtain the final result. MAC processing as taught herein can be applied to a wide range of applications, such as received signal processing in wireless communication for computationally efficient (and high-rate) generation of interference correlation estimates and/or equalization filter values for a received communication signal.

公开(公告)号：AT448604T

公开(公告)日：2009-11-15

申请号：AT04782901

申请日：2004-09-02

Applicant: ERICSSON TELEFON AB L M

Inventor： KHAYRALLAH ALI ,  COZZO CARMELA ,  BOTTOMLEY GREGORY

IPC: H04B1/707

Abstract: 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.

公开(公告)号：AT433228T

公开(公告)日：2009-06-15

申请号：AT01974324

申请日：2001-10-04

Applicant: ERICSSON TELEFON AB L M

Inventor： DENT PAUL ,  BOTTOMLEY GREGORY ,  ATARIUS ROOZBEH

IPC: H04B1/7087 ,  H04B1/712 ,  H04L27/00

Abstract: Code division multiple access signals received through at least one multipath propagation channel are processed to produce at least one relative frequency error estimate. This involves receiving and processing the signals using a local frequency reference oscillator to obtain representative complex numerical samples for processing. The complex numerical samples are correlated with shifts of a locally generated despreading code and a number of complex channel estimates are produced, each corresponding to a different delayed ray of the at least one multipath propagation channel. A frequency error estimate is computed for each ray based on successive values of a respective one of the channel estimates, and a weighted summation of the frequency error estimates is performed to provide at least one relative frequency error estimate.