公开(公告)号：US07050489B1

公开(公告)日：2006-05-23

申请号：US09856438

申请日：1999-11-18

申请人： Frank Sjöberg ,  Sarah Kate Wilson ,  Rickard Nilsson ,  Daniel Bengtsson ,  Mikael Isaksson ,  Tomas Nordström ,  Per Ödling ,  Gunnar Bahlenberg ,  Magnus Johansson ,  Lennart Olsson ,  Sven-Göran Ökvist

发明人： Frank Sjöberg ,  Sarah Kate Wilson ,  Rickard Nilsson ,  Daniel Bengtsson ,  Mikael Isaksson ,  Tomas Nordström ,  Per Ödling ,  Gunnar Bahlenberg ,  Magnus Johansson ,  Lennart Olsson ,  Sven-Göran Ökvist

IPC分类号： H04B1/38

CPC分类号： H04B3/32 ,  H04L5/0007

摘要： One problem, frequently encountered with VDSL transmission systems, is that upstream FEXT produced by system users having short wires can be very strong. Users having shorter wires get high bit rates whereas users having longer wires get low bit rates. In extreme cases it may happen that users with wire lengths greater than 1000 meter cannot transmit data upstream. The present invention provides a VDST transmission system with a plurality of modems. The modems are located at varying distances from a central station. There is a target bit rate for each modem. That modems on shorter wires have control means for reducing their transmit power. This reduces the FEXT produced by these modems enabling modems on longer wires to transmit at higher bit rates.

摘要翻译： VDSL传输系统经常遇到的一个问题是系统用户短路导致的上游FEXT可能非常强大。 具有较短导线的用户获得高比特率，而具有较长导线的用户可获得较低的比特率。 在极端情况下，线长大于1000米的用户无法向上传输数据。 本发明提供一种具有多个调制解调器的VDST传输系统。 调制解调器位于距离中心站不同的距离。 每个调制解调器有一个目标比特率。 较短导线上的调制解调器具有降低发射功率的控制装置。 这减少了由这些调制解调器产生的FEXT，使得更长导线上的调制解调器能够以更高的比特率传输。

公开(公告)号：US07113549B1

公开(公告)日：2006-09-26

申请号：US09622523

申请日：1999-02-17

申请人： Mikael Isaksson ,  Daniel Bengtsson ,  Frank Sjöberg ,  Per Ödling ,  Rickard Nilsson ,  Gunnar Bahlenberg ,  Magnus Johansson ,  Lennart Olsson ,  Göran Ökvist

发明人： Mikael Isaksson ,  Daniel Bengtsson ,  Frank Sjöberg ,  Per Ödling ,  Rickard Nilsson ,  Gunnar Bahlenberg ,  Magnus Johansson ,  Lennart Olsson ,  Göran Ökvist

IPC分类号： H04B15/00

CPC分类号： H04L5/143 ,  H04L27/2607 ,  H04L27/2626 ,  H04L27/2647

摘要： Zipper is the time-synchronized frequency-division duplex implementation of discrete multi-tome (DMT) modulation. Two communicating Zipper modems transmit DMT symbols simultaneously with a common clock. When all transmitters are time synchronized, the near end cross-talk (NEXT) and near end echoes injected into the received signal are orthogonal to the desired signal. The present invention provides a telecommunications transmission system using zipper and having at least two VDSL systems. Each VDSL system comprises a pair of zipper modems communicating over a cable transmission path. The telecommunications transmission system handles zipper transmission transmitted over the common cable; at least partly mitigates NEXT; and permits transmissions in a first VDSL system which are asynchronous with transmissions in a second VDSL system.

摘要翻译： 拉链是离散多包（DMT）调制的时间同步分频双工实现。 两个通信的拉链调制解调器同时发送DMT符号与公共时钟。 当所有发射机都是时间同步时，注入接收信号的近端串扰（NEXT）和近端串扰回波正交于所需信号。 本发明提供一种使用拉链并具有至少两个VDSL系统的电信传输系统。 每个VDSL系统包括通过电缆传输路径通信的一对拉链调制解调器。 电信传输系统处理通过公共电缆传输的拉链传输; 至少部分减轻NEXT; 并允许与第二VDSL系统中的传输异步的第一VDSL系统中的传输。

公开(公告)号：US06606047B1

公开(公告)日：2003-08-12

申请号：US09700888

申请日：2000-11-20

申请人： Per Ola Börjesson ,  Mikael Isaksson ,  Per Ödling ,  Daniel Bengtsson ,  Gunnar Bahlenberg ,  Magnus Johansson ,  Lennart Olsson ,  Sven Göran Ökvist

发明人： Per Ola Börjesson ,  Mikael Isaksson ,  Per Ödling ,  Daniel Bengtsson ,  Gunnar Bahlenberg ,  Magnus Johansson ,  Lennart Olsson ,  Sven Göran Ökvist

IPC分类号： H03M112

CPC分类号： H03M1/12

摘要： A circuit, for digitizing an analogue signal includes an analogue to digital converter, a clip processor adapted to estimate a value for clipped digital signal samples, and a buffer adapted to dynamically store a plurality of digitized samples produced by the analogue to digital converter. The clip processor is adapted to read digitized samples from the buffer and replace clipped digitized samples with the estimated values, thereby mitigating the effects of clipping in an output of the circuit.

摘要翻译： 用于数字化模拟信号的电路包括模数转换器，适于估计经裁剪的数字信号样本的值的剪辑处理器，以及适于动态地存储由模数转换器产生的多个数字化采样的缓冲器。 剪辑处理器适于从缓冲器读取数字化样本，并用估计值替换剪切的数字化样本，从而减轻限幅在电路输出中的影响。

公开(公告)号：US20110305267A1

公开(公告)日：2011-12-15

申请号：US13058330

申请日：2008-08-20

申请人： Jaume Rius I Riu ,  Thomas Magesacher ,  Per Ödling

发明人： Jaume Rius I Riu ,  Thomas Magesacher ,  Per Ödling

IPC分类号： H04B17/00

CPC分类号： H04L25/03343 ,  H04L25/0244 ,  H04L25/03159 ,  H04L25/03821 ,  H04L25/4975 ,  H04L2025/03414 ,  H04L2025/03605

摘要： The present invention relates to a precoder for a communication system arranged to provide transmission blocks for transmission over a transmission channel based on inputted symbol blocks. The precoder is arranged to pre-distort each symbol block based on an estimate of the characteristics of the transmission channel so that the corresponding transmission block appears to be undistorted after transmission over the transmission channel. In accordance therewith, the precoder is arranged to apply Tomlinson-Harashima precoding on a sum of a first measure corresponding to predistortion so as to remove intrasymbol interference and a second measure corresponding to predistortion so as to remove intersymbol interference. The present invention further relates to a method for providing transmission blocks for transmission over a transmission channel in a communication system.

摘要翻译： 本发明涉及一种用于通信系统的预编码器，其被布置为基于输入的符号块提供用于通过传输信道进行传输的传输块。 预编码器被布置为基于传输信道的特性的估计来预失真每个符号块，使得相应的传输块在通过传输信道传输之后看起来不失真。 根据此，预编码器被布置为将Tomlinson-Harashima预编码应用于对应于预失真的第一措施的总和，以便去除对符号间干扰和对应于预失真的第二措施以便去除符号间干扰。 本发明还涉及提供用于在通信系统中通过传输信道进行传输的传输块的方法。

公开(公告)号：US08848811B2

公开(公告)日：2014-09-30

申请号：US13058330

申请日：2008-08-20

申请人： Jaume Rius I Riu ,  Thomas Magesacher ,  Per Ödling

发明人： Jaume Rius I Riu ,  Thomas Magesacher ,  Per Ödling

IPC分类号： H04L27/28 ,  H04L25/03

CPC分类号： H04L25/03343 ,  H04L25/0244 ,  H04L25/03159 ,  H04L25/03821 ,  H04L25/4975 ,  H04L2025/03414 ,  H04L2025/03605

摘要： The present invention relates to a precoder for a communication system arranged to provide transmission blocks for transmission over a transmission channel based on inputted symbol blocks. The precoder is arranged to pre-distort each symbol block based on an estimate of the characteristics of the transmission channel so that the corresponding transmission block appears to be undistorted after transmission over the transmission channel. In accordance therewith, the precoder is arranged to apply Tomlinson-Harashima precoding on a sum of a first measure corresponding to predistortion so as to remove intrasymbol interference and a second measure corresponding to predistortion so as to remove intersymbol interference. The present invention further relates to a method for providing transmission blocks for transmission over a transmission channel in a communication system.

摘要翻译： 本发明涉及一种用于通信系统的预编码器，其被布置为基于输入的符号块提供用于通过传输信道进行传输的传输块。 预编码器被布置为基于传输信道的特性的估计来预失真每个符号块，使得相应的传输块在通过传输信道传输之后看起来不失真。 根据此，预编码器被布置为将Tomlinson-Harashima预编码应用于对应于预失真的第一措施的总和，以便去除对符号间干扰和对应于预失真的第二措施以便去除符号间干扰。 本发明还涉及提供用于在通信系统中通过传输信道进行传输的传输块的方法。

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.

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：US07483401B2

公开(公告)日：2009-01-27

申请号：US10496027

申请日：2001-11-21

申请人： Per Håkan Albin Johansson ,  Per Ödling ,  Pål Frenger ,  Björn Olof Bohlin

发明人： Per Håkan Albin Johansson ,  Per Ödling ,  Pål Frenger ,  Björn Olof Bohlin

IPC分类号： H04J1/00 ,  H04J3/16 ,  H04L12/413 ,  H04L12/28 ,  H04M1/56 ,  H04M1/76

CPC分类号： H04L5/06 ,  H04B3/487 ,  H04L5/143

摘要： A method and arrangement in a communication system for dynamically allocating communication system frequency spectrum after cross-talk interface between transmission medias used for upstream and downstream communication in the frequency spectrum. After detecting cross-talk interface on a disturbed transmission medium caused by transmission on a disturbing transmission medium, the arrangement transmit a media control signal on the disturbed transmission medium and detects a reproduced media control signal that is reproduced due to cross-talk on the disturbing transmission medium. The disturbed or disturbing transmission media can then be dynamically allocated different frequency spectrum to eliminate the interface. In one embodiment, each transmission medium has a default transmission direction, and if one of the transmission is in a direction opposite the default direction, that transmission is reassigned to another transmission medium.

摘要翻译： 一种通信系统中的方法和装置，用于在频谱中用于上下游通信的传输媒体之间的串扰接口之间动态分配通信系统频谱。 在由干扰的传输介质上的传输引起的干扰的传输介质上检测到串扰接口之后，该布置在受干扰的传输介质上发送媒体控制信号，并且检测由于干扰的串扰而再现的再现的媒体控制信号 传输介质。 干扰或干扰的传输介质可以动态地分配不同的频谱以消除接口。 在一个实施例中，每个传输介质具有默认传输方向，并且如果传输中的一个在与默认方向相反的方向上，则该传输被重新分配给另一个传输介质。