公开(公告)号：WO01013530A1

公开(公告)日：2001-02-22

申请号：PCT/FI1999/000984

申请日：1999-11-26

IPC: H04B1/707 ,  H04B7/08

CPC classification number: H04B7/0897 ,  H04B1/7115 ,  H04B1/7117 ,  H04B1/712 ,  H04B7/0851 ,  H04B7/0857 ,  H04B2201/70701 ,  H04B2201/709727

Abstract: The invention relates to a Rake receiver of a CDMA system using IRC. The Rake receiver comprises at least two antenna branches (232A, 232B), at least one Rake finger (270A, 270B), and a delay estimator (290A). The delay estimator (290A) comprises a despreader (296A, 296B) and an allocator (264) for selecting at least one delay, by which delay a multipath propagated signal component is received, and allocating a Rake finger (270A, 270B) for processing the signal component found by informing the Rake finger (270A, 270B) of the delay found. The delay estimator (290A) further comprises: a channel estimator (292), an interference estimator (292) for generating an interference signal, a weighting coefficient part (292) for providing each antenna branch (232A, 232B) with weighting coefficients maximizing the Signal-to-Interference-and-Noise Ratio (SINR), a multiplier (294A, 294B) for multiplying the pilot part by a weighting coefficient, and an antenna branch summer (298A) for combining the despread pilot parts, received via the separate antenna branches (232A, 232B) and multiplied by the weighting coefficient, to one combined pilot signal, on which combined pilot signal the selection is based in the allocator (264).

Abstract translation: 本发明涉及使用IRC的CDMA系统的Rake接收机。 耙式接收机包括至少两个天线分支（232A，232B），至少一个耙指（270A，270B）和延迟估计器（290A）。 延迟估计器（290A）包括解扩器（296A，296B）和分配器（264），用于选择至少一个延迟，由此延迟多径传播信号分量被接收，并且分配用于处理的耙指（270A，270B） 通过通知耙指（270A，270B）发现的延迟而发现的信号分量。 延迟估计器（290A）还包括：信道估计器（292），用于产生干扰信号的干扰估计器（292），用于向每个天线分支（232A，232B）提供加权系数的加权系数部分（292） 信噪比和噪声比（SINR），用于将导频部分乘以加权系数的乘法器（294A，294B）和用于组合经解扩的导频部分的天线分支加法器（298A） 天线分支（232A，232B）并乘以加权系数到一个组合的导频信号，其中选择基于分配器（264）组合的导频信号。

公开(公告)号：WO2013041650A1

公开(公告)日：2013-03-28

申请号：PCT/EP2012/068588

申请日：2012-09-21

Applicant: ST-ERICSSON SA ,  NAS, Ricky ,  SMEETS, Jean-Paul ,  VAN BERKEL, Cornelis

Inventor： NAS, Ricky ,  SMEETS, Jean-Paul ,  VAN BERKEL, Cornelis

IPC: H04B1/7115

CPC classification number: H04B1/7115 ,  H04B2001/70935 ,  H04B2201/709727

Abstract: An intermediate symbol buffer (ISB) configuration and method is provided such that the ISB memory comprises 15 portions, one for each HSDPA spreading code. Symbols associated with a spreading code are written to the memory portion associated with the same spreading code. When a covariance calculation is performed to obtain a more accurate channel estimate, only the symbols associated with spreading codes determined to be needed for the covariance calculation are written to the ISB by a buffer block and red from the ISB by a correlation core. The symbols associated with spreading codes that are not necessary for a covariance calculation may be masked from being written or read from the ISB. In some embodiments each memory portion is an individual memory block. In other embodiments a plurality of memory blocks may contain a plurality of memory portions, one memory partition designated, at least temporarily, or each spreading code.

Abstract translation: 提供中间符号缓冲器（ISB）配置和方法，使得ISB存储器包括15个部分，每个HSDPA扩展码一个。 与扩展码相关联的符号被写入与相同扩展码相关联的存储器部分。 当执行协方差计算以获得更准确的信道估计时，只有与确定为协方差计算所需的扩展码相关联的符号由缓冲块写入ISB，并且通过相关核心从ISB写入红色。 与协方差计算所不需要的扩展码相关联的符号可以从ISB中被写入或读取。 在一些实施例中，每个存储器部分是单个存储器块。 在其他实施例中，多个存储器块可以包含多个存储器部分，至少暂时指定一个或每个扩展码的一个存储器分区。

公开(公告)号：WO2012169948A1

公开(公告)日：2012-12-13

申请号：PCT/SE2011/050717

申请日：2011-06-10

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  KANGAS, Ari ,  EGNELL, Henrik ,  TESSIER, Stéphane

Inventor： KANGAS, Ari ,  EGNELL, Henrik ,  TESSIER, Stéphane

IPC: H04B1/712 ,  H04B1/7105

CPC classification number: H04L27/01 ,  H04B1/7105 ,  H04B1/7115 ,  H04B1/712 ,  H04B2201/709727

Abstract: A method for equalizing a received radio signal in a WCDMA system, comprises receiving (210), in a radio receiver, of a digital radio signal spread by scrambling codes. A channel estimation is performed (230) on the received digital radio signal for a plurality of channels. The received digital radio signal is in an equalizer equalized (240) into an equalized digital radio signal. This equalizing is performed by combining a plurality of part signals, deduced from the digital radio signal, with a respective delay and a respective combining weight. The equalizing (240) comprises provision of the combining weights based on a signal impairment matrix having elements compensated for systematic colouring caused by said scrambling codes.

Abstract translation: 一种用于在WCDMA系统中均衡接收的无线电信号的方法，包括在无线电接收机中接收（210）由扰码扩展的数字无线电信号。 在多个信道的接收的数字无线电信号上执行信道估计（230）。 所接收的数字无线电信号是均衡的（240）均衡的数字无线电信号。 通过将从数字无线电信号推导出的多个部分信号与相应的延迟和相应的组合权重组合来执行该均衡。 均衡（240）包括基于具有由所述扰码引起的系统着色补偿的元素的信号损伤矩阵来提供组合权重。

公开(公告)号：WO2011071428A1

公开(公告)日：2011-06-16

申请号：PCT/SE2009/051397

申请日：2009-12-10

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) ,  WIGREN, Karl Torbjörn

Inventor： WIGREN, Karl Torbjörn

IPC: H04B1/707

CPC classification number: H04B1/7097 ,  H04B1/711 ,  H04B17/26 ,  H04B17/327 ,  H04B17/345 ,  H04B2201/709718 ,  H04B2201/709727

Abstract: A method for noise rise estimation in a wireless communication system comprises receiving (210) of radio signals. An interference whitening (212) is performed. A useful signal power for a first user after the interference whitening is determined (214) for a plurality of time instances. Furthermore, a first user noise floor compensation factor is derived (216) based on combining weights for the first user used in the interference whitening. A probability distribution for a compensated useful signal power for the first user is estimated (218). A conditional probability distribution of a noise floor measure is computed (220). A noise rise measure for the first user is then calculated (222) based at least on the compensated useful signal power for the first user and the conditional probability distribution of a noise floor measure.

Abstract translation: 一种用于无线通信系统中的噪声上升估计的方法包括：接收（210）无线电信号。 执行干涉增白（212）。 在干扰白化之后确定（214）多个时间实例中的第一用户的有用信号功率。 此外，基于在干扰增白中使用的第一用户的组合权重，导出（216）第一用户噪声基底补偿因子。 估计第一用户的补偿有用信号功率的概率分布（218）。 计算噪声本底度量的条件概率分布（220）。 然后，至少基于第一用户的补偿有用信号功率和噪声基底测量的条件概率分布来计算（222）第一用户的噪声上升测量。

公开(公告)号：WO2010004389A3

公开(公告)日：2010-11-25

申请号：PCT/IB2009005944

申请日：2009-06-15

Applicant: ERICSSON TELEFON AB L M ,  CAIRNS DOUGLAS A ,  JONSSON ELIAS

Inventor： CAIRNS DOUGLAS A ,  JONSSON ELIAS

IPC: H04L25/02 ,  H04B1/707 ,  H04L1/00 ,  H04L25/03 ,  H04L25/06 ,  H04L27/00 ,  H04L27/227 ,  H04L27/34 ,  H04L27/38

CPC classification number: H04L25/0236 ,  H04B2201/70701 ,  H04B2201/709727 ,  H04L1/0017 ,  H04L1/0041 ,  H04L1/0068 ,  H04L25/021 ,  H04L25/0226 ,  H04L25/03044 ,  H04L25/03324 ,  H04L25/061 ,  H04L27/0012 ,  H04L27/227 ,  H04L27/3455 ,  H04L27/3818 ,  H04L2001/0098 ,  H04L2025/03401 ,  H04L2025/0342 ,  H04L2025/03426 ,  H04L2025/03509 ,  H04L2025/03796 ,  H04L2027/0061 ,  H04L2027/0093

Abstract: A receiver and method for receiving and processing a sequence of transmitted symbols in a digital communication system utilizing soft pilot symbols. A set of soft pilot symbols are transmitted with higher reliability than the remaining symbols in the sequence by modulating the soft pilot symbols with a lower order modulation such as BPSK or QPSK while modulating the remaining symbols with a higher order modulation such as 16QAM or 64QAM. The receiver knows the modulation type and location (time/frequency/code) of the soft pilot symbols, and demodulates them first. The receiver uses the demodulated soft pilot symbols as known symbols to estimate parameters of the received radio signal. Unlike traditional fixed pilots, the soft pilots still carry some data. Additionally, the soft pilots are particularly helpful in establishing the amplitude reference essential in demodulating the higher order modulation symbols.

Abstract translation: 一种用于在利用软导频符号的数字通信系统中接收和处理发送符号序列的接收机和方法。 通过用诸如BPSK或QPSK的低阶调制来调制软导频符号，同时以诸如16QAM或64QAM的更高阶调制来调制剩余的符号，发送一组软导频符号比该序列中的剩余符号更高的可靠性。 接收机知道软导频符号的调制类型和位置（时间/频率/码），并首先解调它们。 接收机使用解调的软导频符号作为已知符号来估计所接收的无线电信号的参数。 与传统的固定飞行员不同，软飞行员仍然携带一些数据。 此外，软导频器在建立解调高阶调制符号时必不可少的幅度参考是特别有用的。

公开(公告)号：WO2010023530A3

公开(公告)日：2010-04-22

申请号：PCT/IB2009006619

申请日：2009-08-24

Applicant: ERICSSON TELEFON AB L M ,  CAIRNS DOUGLAS A ,  GRANT STEPHEN ,  REIAL ANDRES ,  ROSENQVIST ANDERS ,  JONSSON ELIAS

Inventor： CAIRNS DOUGLAS A ,  GRANT STEPHEN ,  REIAL ANDRES ,  ROSENQVIST ANDERS ,  JONSSON ELIAS

CPC classification number: H04B1/712 ,  H04B2201/709727

Abstract: With a nonparametric G-Rake receiver, combining weights may be determined using a nonparametric mechanism in multiple-input, multiple-output (MIMO) scenarios. In an example embodiment, a method for a receiving device having a nonparametric G-Rake receiver entails calculating an impairment covariance matrix and determining combining weights. More specifically, the impairment covariance matrix is calculated based on a pilot channel using a nonparametric mechanism in a MIMO scenario in which a code-reuse interference term exists. The combining weights are determined for the nonparametric G-Rake receiver responsive to the impairment covariance matrix and by accounting for the code-reuse interference term.

Abstract translation: 使用非参数G-Rake接收机，可以使用多输入多输出（MIMO）场景中的非参数机制来确定组合权重。 在示例实施例中，具有非参数G-Rake接收机的接收设备的方法需要计算损害协方差矩阵并确定组合权重。 更具体地说，在存在码重用干扰项的MIMO场景中，基于使用非参数机制的导频信道来计算损害协方差矩阵。 针对非参数G-Rake接收机响应于损害协方差矩阵并通过计算代码重用干扰项来确定组合权重。

公开(公告)号：WO2010011170A1

公开(公告)日：2010-01-28

申请号：PCT/SE2009/050620

申请日：2009-05-29

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  HE, Ning ,  BOTTOMLEY, Gregory E. ,  LARSSON, Erik

Inventor： HE, Ning ,  BOTTOMLEY, Gregory E. ,  LARSSON, Erik

IPC: H04B1/707 ,  H04L25/03 ,  H04W52/24

CPC classification number: H04B1/712 ,  H04B2201/709727

Abstract: According to the teachings presented herein, a method and apparatus for communication signal processing advantageously use a mix of parametric and non-parametric correlation estimation in communication signal processing. Non-parametric estimation generates an "overall" correlation estimate for a received communication signal, and parametric estimation generates a "component" correlation estimate. The component correlation estimate is removed from the overall correlation estimate to form a partial correlation estimate that is used to process the received communication signal at least initially, such as in a pre-equalization stage. The overall and component correlation estimates are generated as impairment and/or data correlation estimates.

Abstract translation: 根据本文给出的教导，用于通信信号处理的方法和装置有利地在通信信号处理中使用参数和非参数相关估计的混合。 非参数估计对接收到的通信信号产生“总体”相关估计，参数估计产生“分量”相关估计。 从总体相关估计中去除分量相关估计，以形成一个部分相关估计，该估计用于至少最初处理接收的通信信号，例如在预均衡阶段。 总体和分量相关估计是作为减值和/或数据相关估计产生的。

公开(公告)号：WO2009106426A1

公开(公告)日：2009-09-03

申请号：PCT/EP2009/051556

申请日：2009-02-11

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  GRANT, Stephen ,  CAIRNS, Douglas

Inventor： GRANT, Stephen ,  CAIRNS, Douglas

IPC: H04B1/707

CPC classification number: H04L25/03898 ,  H04B1/712 ,  H04B7/0413 ,  H04B7/0619 ,  H04B17/21 ,  H04B17/336 ,  H04B2201/70707 ,  H04B2201/709727

Abstract: A model-based technique for estimating impairment covariance associated with a MIMO signal is disclosed. In an exemplary method, an impairment model is constructed for a received composite information signal comprising at least a first data stream transmitted from first and second antennas according to a first antenna weighting vector. The impairment model includes first and second model terms corresponding to the first and second antennas, respectively, but does not include a cross-antenna interference term. In another embodiment, an impairment model for a received MIMO signal is constructed by computing an impairment model term for each antenna and an additional term to account for precoding interference in a single-stream MIMO transmission scenario. The impairment terms are grouped so that only two associated scaling terms are unknown; values for the scaling terms are estimated by fitting the model to measured impairment covariance values.

Abstract translation: 公开了一种用于估计与MIMO信号相关的损害协方差的基于模型的技术。 在一个示例性方法中，针对接收的复合信息信号构建损伤模型，所述复合信息信号包括根据第一天线加权向量从第一和第二天线发送的至少第一数据流。 损伤模型分别包括对应于第一和第二天线的第一和第二模型项，但不包括横向天线干扰项。 在另一个实施例中，通过计算每个天线的损伤模型项和用于考虑单流MIMO传输场景中的预编码干扰的附加项来构造用于所接收的MIMO信号的损伤模型。 损害条款被分组，使得只有两个相关联的缩放术语是未知的; 通过将模型拟合到测量的损害协方差值来估计缩放术语的值。

公开(公告)号：WO2009098166A2

公开(公告)日：2009-08-13

申请号：PCT/EP2009/051018

申请日：2009-01-29

Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) ,  CAIRNS, Douglas

Inventor： CAIRNS, Douglas

CPC classification number: H04L25/0246 ,  H04B1/71052 ,  H04B1/712 ,  H04B2201/70701 ,  H04B2201/709727 ,  H04L25/0224

Abstract: Teachings presented herein present a 'whitening' channel estimation method and apparatus that produce high-quality net channel estimates for processing a received signal, such as a received CDMA signal. Processing includes forming an initial least squares problem (for medium channel estimates) using known pilot values and corresponding pilot observations for the received signal, transforming the initial least squares problem using a whitening transformation term, and solving the transformed least squares problem to obtain whitened medium channel estimates. The whitening transformation term may be determined, for example, by carrying out a Cholesky factorization of a (traffic) data correlation matrix, which can be obtained from traffic data values for the received signal. Processing further includes converting the whitened medium channel estimates into whitened net channel estimates, which consider the effects of transmit/receive filtering.

Abstract translation: 本文提出的教导提供了一种“白化”信道估计方法和装置，其产生用于处理接收信号（例如接收的CDMA信号）的高质量净信道估计。 处理包括使用已知导频值和接收信号的相应导频观测形成初始最小二乘问题（对于中等信道估计），使用白化变换项变换初始最小二乘问题，并求解变换最小二乘问题以获得白化介质 渠道估计。 白化变换项可以例如通过执行可以从接收信号的业务数据值获得的（业务）数据相关矩阵的Cholesky分解来确定。 处理进一步包括将白化的介质信道估计转换为白化净信道估计，其考虑发射/接收滤波的影响。

公开(公告)号：WO2009074476A1

公开(公告)日：2009-06-18

申请号：PCT/EP2008/066518

申请日：2008-12-01

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) ,  CAIRNS, Douglas A. ,  JONSSON, Elias ,  UESAKA, Kazuyoshi ,  WATABE, Hiroaki

Inventor： CAIRNS, Douglas A. ,  JONSSON, Elias ,  UESAKA, Kazuyoshi ,  WATABE, Hiroaki

IPC: H04B1/707

CPC classification number: H04B1/712 ,  H04B1/7097 ,  H04B2201/709727

Abstract: A mobile receiver having a multi-mode interference suppression function and a way to estimate its speed utilizes a parametric approach to interference suppression at high speeds, and a nonparametric approach at low speeds. In particular, if the mobile receiver is currently operating in a nonparametric mode and its speed exceeds a first predetermined threshold, the mobile receiver switches to a parametric mode. Conversely, if the mobile receiver is currently in parametric mode and its speed is less than a second predetermined threshold, the mobile receiver switches to nonparametric mode. In one embodiment, the speed may be estimated by a Doppler frequency in the received signal, and the thresholds are Doppler frequencies. In one embodiment, the first and second thresholds are different, creating a hysteresis in the mode switching.

Abstract translation: 具有多模式干扰抑制功能的移动接收机和估计其速度的方法利用高速干扰抑制的参数化方法和低速度的非参数方法。 特别地，如果移动接收机当前正在以非参数模式操作并且其速度超过第一预定阈值，则移动接收机切换到参数模式。 相反，如果移动接收机当前处于参数模式并且其速度小于第二预定阈值，则移动接收机切换到非参数模式。 在一个实施例中，可以通过接收信号中的多普勒频率来估计速度，并且阈值是多普勒频率。 在一个实施例中，第一和第二阈值是不同的，在模式切换中产生迟滞。