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1. 发明授权

US07069165B2 Method and arrangement for signal loop test 有权
公开(公告)号：US07069165B2
公开(公告)日：2006-06-27
申请号：US10840820
申请日：2004-05-07
申请人： Jonas Gustafsson Rosenberg , Fredrik Lindqvist , Adam Wiå , Antoni Fertner , Axel Frank Jensen , Per Ola Börjesson , Per Ödling
发明人： Jonas Gustafsson Rosenberg , Fredrik Lindqvist , Adam Wiå , Antoni Fertner , Axel Frank Jensen , Per Ola Börjesson , Per Ödling
IPC分类号： G01D18/00 , G01D3/00 , G01R15/00
CPC分类号： G01R27/04 , H04B3/46 , H04M1/24 , H04M3/305 , H04M3/306
摘要： The invention refers to single-ended test of a loop with the aid of a transceiver, wherein an input impedance (Zin(ƒ)) of the loop is generated. The transceiver has a digital part, a codec and an analog part and is connected to the loop. With the aid of a transmitted and a reflected broadband signal (vin, vout) an echo transfer function Hecho(ƒ)=V(f)out/Vin(f) is generated, which also can be expressed as H echo ⁡ ( f ) = H ∞ ⁡ ( f ) ⁢ Z in ⁡ ( f ) + Z h0 ⁡ ( f ) Z in ⁡ ( f ) + Z hyb ⁡ ( f ) . Here Zh0(ƒ), Zhyb(ƒ) and H∞(ƒ) are model values for the transceiver. In a calibration process a test transceiver, with the same type of hardware as the transceiver, is connected to known impedances, replacing the loop. Hecho(ƒ)=V(f)out/Vin(f) is generated for the known impedances and the model values are generated and are stored in a memory in the transceiver. The stored model values are then used when the input impedance (Zin(ƒ)) for the loop is generated after a measurement of the broadband signal (Vin, vout) is performed.

2. 发明授权

US07362850B2 Method and arrangement for estimation of line properties 有权
标题翻译：线性估计的方法和布置
公开(公告)号：US07362850B2
公开(公告)日：2008-04-22
申请号：US10556657
申请日：2004-05-11
申请人： Axel Frank Jensen , Fredrik Lindqvist , Adam Wiå
发明人： Axel Frank Jensen , Fredrik Lindqvist , Adam Wiå
IPC分类号： H04M1/24 , H04M3/08 , H04M3/22
CPC分类号： G01R27/04 , H04B3/46 , H04M1/24 , H04M3/305 , H04M3/306
摘要： The length and attenuation of a signal line between a transmitter and a customer premises equipment is to be estimated. A frequency dependent line input impedance (Zin(f)) as seen from the transmitter, is measured and an absolute impedance value (œ Zin(f) œ) is generated. The latter is shown as a curve (A1) in the diagram with the frequency (f) on the abscissa and the impedance (œ Zin(f) œ) on the ordinate. Extreme values (Max.1, Max2, Max3; Min1, Min2, Min3) arc denoted and a frequency distance (FD1-FD4) between two consecutive of the extreme values is generated. The line length (L) is generated as L=½·vop/FD1, in which vop is the velocity of propagation of a signal on the line. The attenuation is estimated by multiplying the line length with an average attenuation value for the actual line type. The advantages are that the line length can be estimated with good accuracy in a simple manner for short lines and that the line attenuation is estimated in a simple manner.
摘要翻译：估计发射机和客户端设备之间的信号线的长度和衰减。测量从发射机看到的频率相关的线路输入阻抗（Z（＆lt;（f））），并且测量绝对阻抗值（f）中的绝对阻抗值）。后者在图中以横坐标中的频率（f）和纵坐标上的阻抗（oe Z（o））表示为曲线（A1）。表示极值（最大值1，最大值2，最大值3，最小值1，最小值2，最小值3），并产生两个连续极值之间的频率距离（FD 1 -FD 4）。线长度（L）被生成为L =½.vop/ FD 1，其中vop是线上信号的传播速度。通过将线路长度与实际线路类型的平均衰减值相乘来估计衰减。优点是可以以简单的方式对线路长度以良好的精度估计线路长度，并且以简单的方式估计线路衰减。

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