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    AN ARRANGEMENT AND METHOD RELATING TO ANALYSIS OF TRANSMISSION LINES
    6.
    发明申请
    AN ARRANGEMENT AND METHOD RELATING TO ANALYSIS OF TRANSMISSION LINES 审中-公开
    关于传输线分析的安排和方法

    公开(公告)号：WO2011053212A3

    公开(公告)日：2012-07-26

    申请号：PCT/SE2010050015

    申请日：2010-01-08

    Applicant: ERICSSON TELEFON AB L M ,  FERTNER ANTONI ,  BOERJESSON PER OLA ,  ERICSON KLAS ,  LINDQVIST FREDRIK ,  PAPPA IOANNA ,  HOEST STEFAN ,  BERG MIGUEL

    Inventor： FERTNER ANTONI ,  BOERJESSON PER OLA ,  ERICSON KLAS ,  LINDQVIST FREDRIK ,  PAPPA IOANNA ,  HOEST STEFAN ,  BERG MIGUEL

    IPC: H04B3/46 ,  G01R31/02 ,  G01R31/08

    CPC classification number: H04B3/466 ,  H04M3/26

    Abstract: The present invention relates to an arrangement for analyzing transmission line properties. Measurement data providing means (10) provide data of a first frequency dependent line property, line property calculation arrangement (20) with model handling means (21A), a Hubert transform handler (22) and line property determination means (23) calculate said first property based on model parameters, line resistance at 0 frequency, roc r cut-off frequency, v, line capacitance C8r and line inductance ?^. The line model handling means (21A) calculates the line inductance L(J) via a Hubert transform of Q(f/v)r relating line resistance R(J) to roc such as formula (I). The Hilbert transform values are calculated using a parameterized closed form expression for the Hubert transform or they are tabulated. The line property determination means (23; 23A) calculates the first property and criteria function application means (40) uses the measured first property and the calculated first property for model parameters to find optimized numerical model parameter values.

    Abstract translation: 本发明涉及一种用于分析传输线路特性的装置。 测量数据提供装置（10）提供具有模型处理装置（21A）的第一频率相关线性属性的线数属性计算装置（20），休伯特变换处理器（22）和线属性确定装置（23） 属性基于模型参数，0频率线路电阻，roc r截止频率，v，线路电容C8r和线路电感？^。 线路模型处理装置（21A）经由与线路电阻R（J）相关的Q（f / v）r的休伯特变换到诸如公式（I）的roc来计算线路电感L（J）。 希尔伯特变换值使用Hubert变换的参数化闭合形式表达式计算，或者列表。 行特性确定装置（23; 23A）计算第一属性和标准函数应用装置（40）使用测量的第一属性和所计算的模型参数的第一属性来找到优化的数值模型参数值。

    FREQUENCY DOMAIN ECHO CANCELLER
    7.
    发明申请
    FREQUENCY DOMAIN ECHO CANCELLER 审中-公开
    频域域名解除器

    公开(公告)号：WO0193448A3

    公开(公告)日：2002-10-31

    申请号：PCT/SE0101242

    申请日：2001-06-01

    Applicant: ERICSSON TELEFON AB L M

    Inventor： LINDQVIST FREDRIK ,  FERTNER ANTONI ,  FRENGER PAAL

    IPC: H04B3/23

    CPC classification number: H04B3/23

    Abstract: An echo canceller reduces an echo signal produced when the transmitted signal leaks back into the receiver via a hybrid. The echo canceller estimates the echo signal from the transmitted signal, and then subtracting the estimated echo signal from the received signal. In practice, the echo path channel in a DMT-modem is much longer than the cyclic prefix, and therefore, the received echo signal will be subjected to both ISI (inter-symbol-interference) and ICI (inter-carrier-interference). A traditional echo canceller, designed for a xDSL-modem, uses either a time domain adaptive FIR-filter or a combined echo canceller implemented in both time and frequency domain. A matrix-based adaptive echo canceller is implemented in the frequency domain. Various example embodiments are disclosed.

    Abstract translation: 回波消除器减少当发送的信号通过混合器泄漏回接收器时产生的回波信号。 回波消除器估计来自发射信号的回波信号，然后从接收信号中减去估计的回波信号。 实际上，DMT调制解调器中的回波路径信道比循环前缀长得多，因此接收到的回波信号将受到ISI（符号间干扰）和ICI（载波间干扰）两者的影响。 为xDSL调制解调器设计的传统回声消除器采用时域自适应FIR滤波器或时域和频域实现的组合回波消除器。 在频域中实现基于矩阵的自适应回波消除器。 公开了各种示例性实施例。

    ESTIMATION OF TRANSMISSION LINE INSERTION LOSS
    8.
    发明申请
    ESTIMATION OF TRANSMISSION LINE INSERTION LOSS 审中-公开
    传输线插入损失的估计

    公开(公告)号：WO2008008015A2

    公开(公告)日：2008-01-17

    申请号：PCT/SE2007000446

    申请日：2007-05-08

    Applicant: ERICSSON TELEFON AB L M ,  LINDQVIST FREDRIK

    Inventor： LINDQVIST FREDRIK

    CPC classification number: H04B3/48 ,  G01R31/00

    Abstract: Estimation of line insertion loss (IL (f) ) of a customer transmission line. For a number of different reference transmission lines the insertion loss is laboratory measured at a number of frequencies in double- ended line tests, giving insertion loss values (L11...L14,..., L51...L54). For the same reference transmission lines single-ended laboratory tests are performed, giving one calibration quantity (PV1...PV5) per transmission line, representing the amplitude of a far-end TDR reflection. A relationship is formed between the loss values (L11 L54) and the calibration quantity (PV1...PV5), shown as one straight line (Lf1...Lf4) per frequency (f1...f4). A field single-ended line test is performed on the unknown customer transmission line, giving a calibration quantity (PVX). The insertion loss (IL';(f) ) is read as values (LX1...LX4) for the different frequencies (f1 f4). The calibration quantity (PV1 PV5; PVX) can be measured via a line card or by connecting to the transmission line. For one transmission line different relationships can be set up depending on the termination impedance of the transmission line. Accurate customer transmission line insertion loss is generated.

    Abstract translation: 客户传输线的线插入损耗（IL（f））的估计。 对于多个不同的参考传输线，插入损耗在双线测试中以多个频率实验室测量，给出插入损耗值（L11 ... L14，...，L51 ... L54）。 对于相同的参考传输线，执行单端实验室测试，每个传输线给出一个校准量（PV1 ... PV5），表示远端TDR反射的幅度。 在每个频率（f1 ... f4）表示为一条直线（Lf1 ... Lf4）的损耗值（L11L54）和校准量（PV1 ... PV5）之间形成关系。 在未知的客户传输线上进行现场单端线路测试，给出校准量（PVX）。 插入损耗（IL';（f））被读取为不同频率（f1 f4）的值（LX1 ... LX4）。 校准量（PV1 PV5; PVX）可以通过线卡或连接到传输线进行测量。 对于一个传输线，可以根据传输线的终端阻抗设置不同的关系。 产生精确的客户传输线插入损耗。

    METHOD AND ARRANGEMENT FOR IMPROVED INTERFERENCE REJECTION COMBINING
    9.
    发明公开
    METHOD AND ARRANGEMENT FOR IMPROVED INTERFERENCE REJECTION COMBINING 审中-公开
    方法和系统的组合改善的干扰抑制

    公开(公告)号：EP2510635A4

    公开(公告)日：2013-06-05

    申请号：EP09852108

    申请日：2009-12-09

    Applicant: ERICSSON TELEFON AB L M

    Inventor： LINDQVIST FREDRIK ,  HUSS FREDRIK

    IPC: H04B7/08 ,  H04J11/00

    CPC classification number: H04J11/0046

    Abstract: In a method of interference rejection combining (IRC) for mitigating interference in received signals in the frequency domain for a telecommunication system, selecting (S 10) a sub-group of frequencies of a received signal, determining (S20) a joint representation of a covariance matrix for the interference plus noise for at least one time slot of the received signal for the selected sub-group of frequencies, determining (S30) a channel estimate based on at least one pilot symbol of said at least one time slot. Finally, determining (S40) IRC coefficients in the frequency domain for each symbol of said at least one time slot based on said determined joint representation of the covariance matrix and said determined channel estimate.

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