公开(公告)号：US08681945B2

公开(公告)日：2014-03-25

申请号：US13334602

申请日：2011-12-22

申请人： Klas Ericson ,  Antoni Fertner ,  Fredrik Lindqvist ,  Henrik Almeida ,  Miguel Berg ,  Per Ola Borjesson

发明人： Klas Ericson ,  Antoni Fertner ,  Fredrik Lindqvist ,  Henrik Almeida ,  Miguel Berg ,  Per Ola Borjesson

IPC分类号： H04M1/24 ,  H04M3/08 ,  H04M3/22 ,  H04M1/00

CPC分类号： H04B3/46 ,  G01R27/32 ,  G01R35/005 ,  H04M3/304 ,  H04M11/062

摘要： Method, arrangement and devices for calibration of a line driving device, such as a DSLAM, having a line port. The method comprises deriving of a first parameter vector, PVinf, for example Hinf. The parameter vector PVinf is derived by performing, at a first site, an echo measurement on the line driving device while the line port on said line driving device is open. The method further comprises calibrating the line driving device based on the first parameter vector PVinf and a second parameter vector PVref, which second parameter vector is based on information on echo measurements performed on at least one reference line driving device.

摘要翻译： 具有线路端口的线路驱动装置（如DSLAM）的校准方法，装置和装置。 该方法包括导出第一参数矢量PVinf，例如Hinf。 参数矢量PVinf是通过在线路驱动装置上的线路端口打开时在线路驱动装置处的第一站点执行回波测量而导出的。 该方法还包括基于第一参数矢量PVinf和第二参数矢量PV ref校准线驱动装置，第二参数矢量基于关于在至少一个参考线驱动装置上执行的回波测量的信息。

公开(公告)号：US20120163559A1

公开(公告)日：2012-06-28

申请号：US13394392

申请日：2009-09-11

申请人： Antoni Fertner ,  Per Ola Börjesson ,  Daniel Cederholm

发明人： Antoni Fertner ,  Per Ola Börjesson ,  Daniel Cederholm

IPC分类号： H04B3/46

CPC分类号： H04B3/466

摘要： Transmission properties of a telecommunications transmission line may be estimated with improved accuracy by numerical solution for Γ of Zin·jω̂C=Γcoth(Γ). At least one curve is adapted to Γ solutions already obtained and a starting point for numerical solution is selected in dependence of the at least one curve and in dependence of an already obtained solution close in frequency. In a first frequency range, starting points for numerical solution may be calculated from a biquadratic equation. In a second frequency range, a line in the complex plane may be adapted to solutions already obtained and new starting points selected in dependence of the line and in dependence of the previous solution. In a third frequency range, two lines in the frequency plane may be adapted to solutions already obtained and new starting points selected in dependence of the lines.

摘要翻译： 电信传输线路的传输特性可以通过＆Ggr的数值解决方案提高精度来估计; 的Zin·jωC=＆Ggr; coth（＆Ggr。）。 至少有一条曲线适应于＆Ggr; 已经获得的解决方案和数值解的起点根据至少一条曲线选择，并且依赖于已经获得的频率接近的解。 在第一个频率范围内，数值解的起始点可以从二次方程计算。 在第二频率范围中，复平面中的线可以适应已经获得的解和根据线选择并且依赖于先前解的新起始点。 在第三频率范围内，频率平面中的两条线可以适应已经获得的解和根据线选择的新起点。

公开(公告)号：US08065100B2

公开(公告)日：2011-11-22

申请号：US12162665

申请日：2006-01-31

申请人： Fredrik Lindqvist ,  Antoni Fertner ,  Per Ola Börjesson

发明人： Fredrik Lindqvist ,  Antoni Fertner ,  Per Ola Börjesson

IPC分类号： G01R11/16 ,  G01R5/28 ,  G01R29/08 ,  G01N35/00

CPC分类号： H04M3/306 ,  H04B3/46

摘要： A system and method for using loop topology identification to investigate a transmission line having a plurality of cable segments. At a measurement plane for each segment, a probing signal is transmitted into the cable. A reflected signal is detected, and an equivalent total input impedance is calculated. The system iteratively calculates the distance between the measurement planes as well as the length, characteristic impedance, and the propagation constant of each segment. A model is used to calculate the respective equivalent input impedance of each segment using the calculated characteristic impedance, propagation constant, and length of the preceding segment. The equivalent total input impedance is then calculated from the iteratively calculated segment values.

摘要翻译： 一种用于使用环路拓扑识别来研究具有多个电缆段的传输线的系统和方法。 在每个段的测量平面，探测信号被传输到电缆中。 检测反射信号，并计算等效的总输入阻抗。 系统迭代地计算测量平面之间的距离以及每段的长度，特征阻抗和传播常数。 使用模型使用计算的特征阻抗，传播常数和前一段的长度来计算每个段的相应等效输入阻抗。 然后从迭代计算的段值计算等效的总输入阻抗。

公开(公告)号：US07844436B2

公开(公告)日：2010-11-30

申请号：US12478908

申请日：2009-06-05

申请人： Fredrik Lindqvist ,  Antoni Fertner

发明人： Fredrik Lindqvist ,  Antoni Fertner

IPC分类号： G06F17/50 ,  G01R15/00

CPC分类号： H04M3/306

摘要： A method and localization unit for localizing load coils within a transmission line. The load coil localization is achieved using a measurement of a Single-Ended Line Testing (SELT) parameter for the transmission line and an approximation of the SELT parameter obtained from a model of the transmission line. The model is based on a parameter vector θ including parameters describing the transmission properties of each load coil and cable section and the length of a plurality of individual cable sections as unknown independent parameters. The location of at least one load coil is determined by substantially minimizing a criterion function that represents a deviation between the measurement of the SELT parameter and the approximation of the SELT parameter obtained from the model. The load coil localization method and unit can be used for both symmetric and asymmetric transmission lines.

摘要翻译： 一种用于在传输线路内定位负载线圈的方法和定位单元。 使用对传输线的单端线测试（SELT）参数的测量以及从传输线的模型获得的SELT参数的近似来实现负载线圈定位。 该模型基于参数向量＆thetas; 包括描述每个负载线圈和电缆部分的传输特性的参数和多个单独的电缆部分的长度作为未知的独立参数。 通过基本上最小化表示SELT参数的测量与从模型获得的SELT参数的近似之间的偏差的标准函数来确定至少一个负载线圈的位置。 负载线圈定位方法和单位可用于对称和非对称传输线。

公开(公告)号：US08428224B2

公开(公告)日：2013-04-23

申请号：US12988314

申请日：2008-04-23

申请人： Antoni Fertner ,  Per Ola Börjesson ,  Klas Ericson

发明人： Antoni Fertner ,  Per Ola Börjesson ,  Klas Ericson

IPC分类号： H04M1/24 ,  H04M3/08 ,  H04M3/22

CPC分类号： H04B3/46

摘要： The present invention concerns methods for estimating one or more transmission properties of a telecommunications transmission line. Estimates of the line input impedance, Zin at a frequency ƒ, and the line capacitance Ĉ are made. An estimate is then made in dependence of Ĉ, the frequency ƒ and a value Γ, where Γ satisfies the relationship Γ coth (Γ)=Zin·jωĈ, and ω=2πƒ. Accuracy may be improved by least squares fitting a curve to a set of intermediate values and then generating an estimate from the coefficients of the curve.

摘要翻译： 本发明涉及用于估计电信传输线路的一个或多个传输特性的方法。 进行线路输入阻抗的估计，频率f的Zin和线路电容C。 然后根据C，频率f和值Gamma进行估计，其中Gamma满足关系Gamma coth（Gamma）= Zin·jomegaC，ω= 2pif。 可以通过将曲线拟合到一组中间值然后从曲线的系数生成估计值的最小二乘法来提高精度。

公开(公告)号：US08290122B2

公开(公告)日：2012-10-16

申请号：US12091314

申请日：2005-10-27

申请人： Stefan Allevad ,  Per Ödling ,  Antoni Fertner ,  Henrik Back ,  Fredrik Lindqvist ,  Per Ola Börjesson ,  Jaume Rius i Riu

发明人： Stefan Allevad ,  Per Ödling ,  Antoni Fertner ,  Henrik Back ,  Fredrik Lindqvist ,  Per Ola Börjesson ,  Jaume Rius i Riu

IPC分类号： H04M1/24 ,  H04M3/08 ,  H04M3/22

CPC分类号： H04B3/46

摘要： A method and device for estimating one or more transmission properties of a telecommunication transmission line. At least one signal is sent on the line, the at least one signal including at least two frequencies for which the absolute value of the line propagation constant times the line length is less than π, and a resulting signal is received. An estimate of at least one transmission line property is then determined by examining the relationship between the sent and resulting signal or signals. The process may be repeated, if necessary. The estimate determination may also be repeated one or more times, with each successive estimate preferably using for the determination only those frequencies for which, as previously estimated, the absolute value of the line propagation constant times the line length is less than π.

摘要翻译： 一种用于估计电信传输线的一个或多个传输特性的方法和装置。 在该线上发送至少一个信号，所述至少一个信号包括线路传播常数的绝对值乘以线路长度的至少两个频率小于＆pgr，并且接收到所得到的信号。 然后，通过检查所发送和产生的信号或信号之间的关系来确定至少一个传输线属性的估计。 如果需要，可以重复该过程。 估计确定也可以重复一次或多次，其中优选地使用每个连续估计仅用于确定如前所述的线路传播常数的绝对值乘以线长度的频率小于＆pgr的那些频率。

公开(公告)号：US20100156553A1

公开(公告)日：2010-06-24

申请号：US12478908

申请日：2009-06-05

申请人： Fredrik Lindqvist ,  Antoni Fertner

发明人： Fredrik Lindqvist ,  Antoni Fertner

IPC分类号： H03H7/38

CPC分类号： H04M3/306

摘要： A method and localization unit for localizing load coils within a transmission line. The load coil localization is achieved using a measurement of a Single-Ended Line Testing (SELT) parameter for the transmission line and an approximation of the SELT parameter obtained from a model of the transmission line. The model is based on a parameter vector θ including parameters describing the transmission properties of each load coil and cable section and the length of a plurality of individual cable sections as unknown independent parameters. The location of at least one load coil is determined by substantially minimizing a criterion function that represents a deviation between the measurement of the SELT parameter and the approximation of the SELT parameter obtained from the model. The load coil localization method and unit can be used for both symmetric and asymmetric transmission lines.

摘要翻译： 一种用于在传输线路内定位负载线圈的方法和定位单元。 使用对传输线的单端线测试（SELT）参数的测量以及从传输线的模型获得的SELT参数的近似来实现负载线圈定位。 该模型基于参数向量＆thetas; 包括描述每个负载线圈和电缆部分的传输特性的参数和多个单独的电缆部分的长度作为未知的独立参数。 通过基本上最小化表示SELT参数的测量与从模型获得的SELT参数的近似之间的偏差的标准函数来确定至少一个负载线圈的位置。 负载线圈定位方法和单位可用于对称和非对称传输线。

公开(公告)号：US07395162B2

公开(公告)日：2008-07-01

申请号：US11276599

申请日：2006-03-07

申请人： Antoni Fertner ,  Fredrik Lindqvist ,  Per Ola Börjesson

发明人： Antoni Fertner ,  Fredrik Lindqvist ,  Per Ola Börjesson

IPC分类号： G06F19/00

CPC分类号： H04M3/306 ,  H04M3/2209

摘要： A method is described herein that can be used to detect the presence of a load coil within a transmission line. The method can also be used to determine the number of load coil(s) present within the transmission line. In addition, the method can be used to determine the distance to the first load coil.

摘要翻译： 本文描述了可用于检测传输线内的负载线圈的存在的方法。 该方法还可以用于确定传输线内存在的负载线圈的数量。 此外，该方法可用于确定到第一负载线圈的距离。

公开(公告)号：US06169723A

公开(公告)日：2001-01-02

申请号：US08990741

申请日：1997-12-15

申请人： Antoni Fertner ,  Mattias Hyll ,  Anders {umlaut over (O)}rling

发明人： Antoni Fertner ,  Mattias Hyll ,  Anders {umlaut over (O)}rling

IPC分类号： G01R2316

CPC分类号： G06F17/142

摘要： The present invention significantly reduces the number of complex computations that must be performed to compute a DFT or IDFT when a pattern is identified in an original input data sequence and is used to modify the data sequence in order to reduce the size of the sequence to be transformed. A DFT (IDFT) is performed on the modified input data sequence to generate a transformed sequence. The transformed data sequence is then manipulated to generate an output sequence that corresponds to the DFT (IDFT) of the original input data sequence without having actually calculated the DFT (IDFT) of the entire, original input data sequence. Three symmetrical patterns are used in the invention to simplify and render more efficient DFT and IDFT computations: Hermite symmetry, index-reversed, complex-conjugate symmetry, and mirror symmetry. As a result, the number of complex multiplications required to perform the DFT (or IDFT) is considerably less than the number of complex multiplications required to calculate the DFT (or IDFT) of the original input data sequence. The computational reduction increases signal processing speed and decreases power consumption, both attributes are highly desirable in virtually every DFT/IDFT application.

摘要翻译： 当在原始输入数据序列中识别模式时，本发明显着地减少了为了计算DFT或IDFT而必须执行的复杂计算的数量，并且用于修改数据序列以便将序列的大小减小为 转变 对修改的输入数据序列执行DFT（IDFT）以产生变换的序列。 然后处理经变换的数据序列以产生对应于原始输入数据序列的DFT（IDFT）的输出序列，而不实际计算整个原始输入数据序列的DFT（IDFT）。 本发明中使用三个对称图案来简化和提供更有效的DFT和IDFT计算：Hermite对称性，索引反转，复共轭对称性和镜像对称性。 结果，执行DFT（或IDFT）所需的复数乘法数量远远少于计算原始输入数据序列的DFT（或IDFT）所需的复乘次数。 计算量减少增加了信号处理速度并降低了功耗，这两个属性在几乎每个DFT / IDFT应用中是非常需要的。

公开(公告)号：US5793801A

公开(公告)日：1998-08-11

申请号：US679387

申请日：1996-07-09

申请人： Antoni Fertner

发明人： Antoni Fertner

IPC分类号： H04B3/23 ,  H04B1/40 ,  H03H7/40 ,  H04B1/12 ,  H04L7/00

CPC分类号： H04B3/23

摘要： In a digital communications system, a sampled signal is precisely reconstructed (rather than approximated) even in situations where the phase of the sampling signal is adjusted. More particularly, the sampled signal is compensated in the frequency domain for phase adjustments to the sampling instance in the time domain. In the context of echo cancellation, an echo transfer function is generated representing the echo channel impulse response. Aliased components present in the echo impulse response are specifically identified and compensated for in the frequency domain by treating each spectral filter coefficient of the echo transfer function as the sum of a baseband component and an aliased component. In addition to accurately compensating for sampling phase adjustments, this technique considerably relaxes traditional sampling constraints.

摘要翻译： 在数字通信系统中，即使在调整采样信号的相位的情况下，采样信号也被精确地重构（而不是近似）。 更具体地，采样信号在频域中进行补偿，以便在时域中对采样实例进行相位调整。 在回波消除的上下文中，产生表示回波信道脉冲响应的回波传递函数。 存在于回波脉冲响应中的混叠分量通过将回波传递函数的每个频谱滤波器系数作为基带分量和混叠分量的和来特定地在频域中被识别和补偿。 除了准确地补偿采样相位调整之外，这种技术相当放松了传统的采样约束。