公开(公告)号：US09780830B2

公开(公告)日：2017-10-03

申请号：US14342258

申请日：2011-08-31

申请人： Chenguang Lu ,  Per-Erik Eriksson

发明人： Chenguang Lu ,  Per-Erik Eriksson

IPC分类号： H04J3/10 ,  H04B3/32 ,  H04M11/06 ,  H04B3/487 ,  H04L5/00

CPC分类号： H04B3/32 ,  H04B3/487 ,  H04L5/00 ,  H04M11/062

摘要： A device for limiting crosstalk between vectoring modems connected to a group of communication lines comprises a subgroup determining element that obtains information of the division into subgroups, each subgroup being made up of lines experiencing cross-talk from each other, and assigns operational pilot sequences to the group according to the division, an operational sequence transmission control element that transmits the operational sequences on the lines to the modems, which sequences are mutually orthogonal to each other and each communication line receives a corresponding sequence, and a corrective action determining element that obtains cross-talk measurements related to the transmitted operational pilot sequences and determines, for each subgroup, cross-talk and corrective action based on measurements made for a number of sequence symbols, which number corresponds to the minimum number required for obtaining mutually orthogonal pilot sequences within the subgroup.

公开(公告)号：US20140219074A1

公开(公告)日：2014-08-07

申请号：US14239875

申请日：2011-08-24

申请人： Chenguang Lu ,  Miguel Berg ,  Per-Erik Eriksson ,  Albin Johansson

发明人： Chenguang Lu ,  Miguel Berg ,  Per-Erik Eriksson ,  Albin Johansson

IPC分类号： H04B3/32

CPC分类号： H04B3/32 ,  H04J1/12 ,  H04J3/10 ,  H04L5/0062 ,  H04L25/03343 ,  H04L25/03885

摘要： Method and transmitting node for adjusting transmission over xDSL lines connected to the transmitting node. The method involves transmitting (1006) a first signal A1 on a first line (304), and transmitting (1008) a second signal A2 on a second line (306), the second signal A2 being related to the first signal A1. The method further involves adjusting (1010) the transmission of the second signal A2 on the second line (306), such that a contribution from the second signal A2 interferes constructively with a signal A1′ at the second end (304:2) of the first line (304), where the signal A1′ represents the signal A1 having propagated through the first line.

摘要翻译： 用于通过连接到发送节点的xDSL线路调整传输的方法和发送节点。 该方法包括在第一行（304）上发送（1006）第一信号A1，并在第二行（306）上发送（1008）第二信号A2，第二信号A2与第一信号A1相关。 该方法还包括在第二线路（306）上调整（1010）第二信号A2的传输，使得来自第二信号A2的贡献建构性地干扰第二信号A2的第二端（304：2）处的信号A1' 第一行（304），其中信号A1'表示通过第一行传播的信号A1。

公开(公告)号：US20140011443A1

公开(公告)日：2014-01-09

申请号：US13521516

申请日：2012-07-05

申请人： Chenguang Lu ,  Elmar Trojer ,  Jacob Osterling ,  Miguel Berg ,  Per-Erik Eriksson ,  Ralf Bergqvist

发明人： Chenguang Lu ,  Elmar Trojer ,  Jacob Osterling ,  Miguel Berg ,  Per-Erik Eriksson ,  Ralf Bergqvist

IPC分类号： H04W88/04

CPC分类号： H04W72/085 ,  H04B1/0071 ,  H04B3/487 ,  H04W16/10 ,  H04W16/32 ,  H04W24/02 ,  H04W72/0453 ,  H04W84/045 ,  H04W88/085

摘要： A first network node of a cellular system is configured for communication with a second network node over a twisted pair wire. The first network node includes a receiver for receiving, over the twisted pair wire, an intermediate frequency signal from the second network node, which intermediate frequency signal has been converted from a high frequency signal having a frequency higher than the frequency of the intermediate frequency signal by the second network node, and a down-converter for converting the intermediate frequency signal to a low frequency signal having a frequency lower than the frequency of the intermediate frequency signal. The first network node also includes an up-converter for converting a received low frequency signal to an intermediate frequency signal having a frequency higher than the frequency of the low frequency signal.

摘要翻译： 蜂窝系统的第一网络节点被配置为通过双绞线与第二网络节点进行通信。 第一网络节点包括用于通过双绞线接收来自第二网络节点的中频信号的接收机，该中频信号已从具有高于中频信号频率的频率的高频信号转换 以及用于将中频信号转换为具有低于中频信号的频率的频率的低频信号的下变频器。 第一网络节点还包括用于将接收的低频信号转换成具有高于低频信号的频率的频率的中频信号的上变频器。

公开(公告)号：US08588051B2

公开(公告)日：2013-11-19

申请号：US13021734

申请日：2011-02-05

申请人： Per-Erik Eriksson ,  Chenguang Lu

发明人： Per-Erik Eriksson ,  Chenguang Lu

IPC分类号： H04B1/38 ,  H04J3/10

CPC分类号： H04B3/32 ,  H04B3/487

摘要： A device for providing access to a data communication network for modems is connected to the modems via a set of communication lines. The modems include a first group supporting vectoring and a second group not supporting vectoring. The device investigates the expected value of an element in a synchronization interval to be received by a modem in the second group, investigates the value of an element of at least one data sequence assigned to the communication line of this modem, compares the values, selects the element of the investigated data sequence for transmission if the element value corresponds to the expected value and transmits the selected element and corresponding elements of a number of pilot sequences assigned to the first group of modems via the set of communication lines.

摘要翻译： 用于提供对调制解调器的数据通信网络的访问的设备经由一组通信线路连接到调制解调器。 调制解调器包括支持向量化的第一组和不支持向量化的第二组。 该装置调查在第二组中由调制解调器接收的同步间隔中的元素的期望值，调查分配给该调制解调器的通信线路的至少一个数据序列的元素的值，比较该值，选择 如果元素值对应于期望值，则发送的被调查数据序列的元素，并且经由该组通信线路发送分配给第一组调制解调器的多个导频序列的所选元素和相应元素。

公开(公告)号：US09667464B2

公开(公告)日：2017-05-30

申请号：US14355517

申请日：2012-02-14

申请人： Per-Erik Eriksson ,  Miguel Berg ,  Daniel Cederholm ,  Klas Ericson ,  Chenguang Lu

发明人： Per-Erik Eriksson ,  Miguel Berg ,  Daniel Cederholm ,  Klas Ericson ,  Chenguang Lu

IPC分类号： H04L27/26 ,  H04B3/46 ,  H04M3/30 ,  H04L5/14 ,  H04L12/26

CPC分类号： H04L27/2634 ,  H04B3/46 ,  H04L5/14 ,  H04L27/263 ,  H04L43/50 ,  H04M3/306

摘要： The present disclosure relates to a Time Duplex Division (TDD) modem and a method in such a modem for making Single Ended Line Test (SELT) measurements. The device comprises a transmitter and a receiver and it has a normal mode of TDD communication. In these devices, Time Domain Reflectometry (TDR) is used as line measurement. It has a number of drawbacks, and for overcoming said drawbacks, Frequency Domain Reflectometry (FDR) measurement techniques adapted for TDD devices are suggested.

公开(公告)号：US09166743B2

公开(公告)日：2015-10-20

申请号：US13976665

申请日：2010-12-29

申请人： Per-Erik Eriksson ,  Chenguang Lu

发明人： Per-Erik Eriksson ,  Chenguang Lu

IPC分类号： H04L1/08 ,  H04L1/18 ,  H04L1/20

CPC分类号： H04L1/08 ,  H04L1/1867 ,  H04L1/1874 ,  H04L1/20

摘要： When data retransmission is used to handle errors caused by impulse noise, buffer memory requirements may be reduced and/or data rate increased by detecting impulse noise at the transmitting equipment and initiating retransmission in response to such detection rather than waiting for a retransmission indication from the receiving end. The decision to retransmit may be made dependent on the strength or other properties of the detected noise burst. The decision criterion may be made adaptive by correlating noise burst properties with received retransmission indications or the absence thereof.

摘要翻译： 当使用数据重传来处理由脉冲噪声引起的错误时，可以通过检测发射设备的脉冲噪声并响应于这种检测而发起重传来减少缓冲存储器要求和/或数据速率，而不是等待来自 接收端。 重传的决定可以取决于检测到的噪声突发的强度或其他属性。 可以通过将噪声突发特性与接收的重传指示相关联或其不存在来使决策标准适应。

公开(公告)号：US08724800B2

公开(公告)日：2014-05-13

申请号：US13814265

申请日：2010-08-05

申请人： Chenguang Lu ,  Per-Erik Eriksson

发明人： Chenguang Lu ,  Per-Erik Eriksson

IPC分类号： H04M1/76 ,  H04J1/12

CPC分类号： H04B3/32 ,  H04M3/18 ,  H04M3/34 ,  H04M11/062

摘要： Method and arrangement in a Vector Control Entity for efficient selection of which crosstalk to cancel when applying partial vectoring in a DSL communication system. The method comprises calculating a respective crosstalk effect indicator, CEIij, for the crosstalk from each line j of a plurality J of lines in a vectoring group, to a plurality of tones Si of a line i in the vectoring group, based on the strength of the crosstalk from each line j to line i, and thus providing one CEIi-value, associated with the plurality Sj of tones, per line j. The method further comprises allocating partial-vectoring resources to cancellation of crosstalk, based on the calculated CEIs. The arrangement is adapted to enable the performance of the above described method.

摘要翻译： 矢量控制实体中的方法和布置，用于在DSL通信系统中应用部分矢量化时，有效选择要消除的串扰。 该方法包括基于矢量组中的线i的强度来计算针对矢量组中的多条线的每条线j的串扰到矢量组中的线i的多个音调Si的相应串扰效应指示符CEIij， 每行j与每行j的串扰，并且因此提供与每个线j的多个Sj的多个Sj相关联的一个CEIi值。 该方法还包括基于所计算的CEI，分配部分向量化资源以消除串扰。 该装置适于实现上述方法的执行。

公开(公告)号：US09374133B2

公开(公告)日：2016-06-21

申请号：US14234757

申请日：2011-07-25

申请人： Per-Erik Eriksson ,  Chenguang Lu

发明人： Per-Erik Eriksson ,  Chenguang Lu

IPC分类号： H04L27/26 ,  H04W52/02 ,  H04B3/32

CPC分类号： H04B3/32 ,  H04L27/2601 ,  H04L27/2618 ,  H04W52/02

摘要： In a vectoring-capable DSL system, power can be saved by a low power mode wherein data transmission is reduced or halted, but synch symbols continue to be transmitted, so that estimation of crosstalk coefficients may continue during the low power mode. When crosstalk coefficient estimates are up to date, a line may exit low power mode without causing problematic changes of crosstalk noise in other lines, since the vectoring functionality will eliminate or reduce the crosstalk.

摘要翻译： 在具有向导能力的DSL系统中，可以通过降低或停止数据传输但是同步符号继续发送的低功率模式来节省功率，从而在低功率模式期间串扰系数的估计可以继续。 当串扰系数估计是最新的时候，一条线路可以退出低功率模式，而不会导致其他线路中串扰噪声的有问题的改变，因为矢量化功能将消除或减少串扰。

公开(公告)号：US20140169489A1

公开(公告)日：2014-06-19

申请号：US14234757

申请日：2011-07-25

申请人： Per-Erik Eriksson ,  Chenguang Lu

发明人： Per-Erik Eriksson ,  Chenguang Lu

IPC分类号： H04B3/32 ,  H04L27/26

CPC分类号： H04B3/32 ,  H04L27/2601 ,  H04L27/2618 ,  H04W52/02

摘要： In a vectoring-capable DSL system, power can be saved by a low power mode wherein data transmission is reduced or halted, but synch symbols continue to be transmitted, so that estimation of crosstalk coefficients may continue during the low power mode. When crosstalk coefficient estimates are up to date, a line may exit low power mode without causing problematic changes of crosstalk noise in other lines, since the vectoring functionality will eliminate or reduce the crosstalk.

摘要翻译： 在具有向导能力的DSL系统中，可以通过降低或停止数据传输但是同步符号继续发送的低功率模式来节省功率，从而在低功率模式期间串扰系数的估计可以继续。 当串扰系数估计是最新的时候，一条线路可以退出低功率模式，而不会导致其他线路中串扰噪声的有问题的改变，因为矢量化功能将消除或减少串扰。

公开(公告)号：US20120183026A1

公开(公告)日：2012-07-19

申请号：US13021734

申请日：2011-02-05

申请人： Per-Erik Eriksson ,  Chenguang Lu

发明人： Per-Erik Eriksson ,  Chenguang Lu

IPC分类号： H04B1/38

CPC分类号： H04B3/32 ,  H04B3/487

摘要： A device for providing access to a data communication network for modems is connected to the modems via a set of communication lines. The modems include a first group supporting vectoring and a second group not supporting vectoring. The device investigates the expected value of an element in a synchronization interval to be received by a modem in the second group, investigates the value of an element of at least one data sequence assigned to the communication line of this modem, compares the values, selects the element of the investigated data sequence for transmission if the element value corresponds to the expected value and transmits the selected element and corresponding elements of a number of pilot sequences assigned to the first group of modems via the set of communication lines.

摘要翻译： 用于提供对调制解调器的数据通信网络的访问的设备经由一组通信线路连接到调制解调器。 调制解调器包括支持向量化的第一组和不支持向量化的第二组。 该装置调查在第二组中由调制解调器接收的同步间隔中的元素的期望值，调查分配给该调制解调器的通信线路的至少一个数据序列的元素的值，比较该值，选择 如果元素值对应于期望值，则发送的被调查数据序列的元素，并且经由该组通信线路发送分配给第一组调制解调器的多个导频序列的所选择的元素和对应的元素。