中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

49 records (took 0.029 seconds)

    SYMBOLIC ANALYSIS OF ELECTRICAL CIRCUITS FOR APPLICATION IN TELECOMMUNICATIONS
    5.
    发明申请
    SYMBOLIC ANALYSIS OF ELECTRICAL CIRCUITS FOR APPLICATION IN TELECOMMUNICATIONS 审中-公开
    电路应用电路的符号分析

    公开(公告)号：WO2005010780A3

    公开(公告)日：2005-05-12

    申请号：PCT/IB2004002423

    申请日：2004-07-28

    Applicant: ERICSSON TELEFON AB L M ,  LUEPPERT EDWIN

    Inventor： FERTNER ANTONI ,  LUEPPERT EDWIN

    IPC: G06F17/50 ,  H03F1/26

    CPC classification number: G06F17/5036

    Abstract: Analysis of an electrical circuit is performed using a computer program product (60) and a method. In accordance with the program and the method, a electrical circuit analyzer generates an admittance matrix (Y) for an electrical circuit which is being analyzed. The admittance matrix includes symbolic expressions rather than numerical expressions for at least some components of the electrical circuit. The electrical circuit analyzer linearly and algebraically solves an equation system including the admittance matrix for analyzing at least apart of the electrical circuit. The electrical circuit analyzer uses symbolic computation to solve the equation system including the admittance matrix for analyzing at least a part of the electrical circuit. The equation system including the admittance matrix can be solved in various types of analyses, including (1) determining a transfer function between specified nodes of the electrical circuit; and (2) optimizing a component of the electrical circuit. The electrical circuit analyzer sets up the admittance matrix Y by following a set of "rules". Special rules are provided for certain telecommunications components, such as multi-winded transforrs, loading coils, line-drivers, analogue cables, and filters. In accordance with a block/subcircuit matrix approach, an overall circuit is divided into plural subcircuits.

    Abstract translation: 使用计算机程序产品（60）和方法来执行电路的分析。 根据程序和方法，电路分析仪产生正在分析的电路的导纳矩阵（Y）。 导纳矩阵包括符号表达式而不是用于电路的至少一些部件的数字表达式。 电路分析仪线性地和代数地求解包括用于分析电路的至少一部分的导纳矩阵的方程式系统。 电路分析仪使用符号计算来求解包括用于分析电路的至少一部分的导纳矩阵的方程式系统。 包括导纳矩阵的方程式可以在各种类型的分析中得到解决，包括（1）确定电路的指定节点之间的传递函数; 和（2）优化电路的分量。 电路分析仪通过遵循一组“规则”来设置导纳矩阵Y. 为某些电信部件提供特殊规则，如多风道变压器，负载线圈，线路驱动器，模拟电缆和滤波器。 根据块/分支矩阵方法，整个电路被分成多个子电路。

    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
    10.
    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。

Patent Agency Ranking