公开(公告)号：EP1109328A1

公开(公告)日：2001-06-20

申请号：EP99410173.1

申请日：1999-12-14

Applicant: STMicroelectronics S.A. ,  STMicroelectronics N.V.

Inventor： Nordström, Thomas ,  Bengtsson, Daniel ,  Isson, Olivier

IPC: H04B3/32

CPC classification number: H04L25/03343 ,  H04B1/62 ,  H04B3/32 ,  H04L27/2601

Abstract: The invention relates to a far-end crosstalk (FEXT) canceling circuit for a digital subscriber line transmission system, said transmission system comprising a plurality n of line termination (LT) modems (Mi) transmitting discrete multitone (DMT) symbols Si to corresponding network (NT) termination modems (Mc(i)) over n transmission channels.
The invention proposes to multiply the vector S = (Si) i = 1 to n, before transmission, by a precompensation matrix M such that the matrix product H*M is diagonal, H being the transfer matrix of the n downstream transmission channels defined by R = H*S where R = (Ri), i = 1 to n, is the vector of the DMT symbols Ri respectively received by the modems Mc(i).

Abstract translation: 本发明涉及一种用于数字用户线传输系统的远端串扰（FEXT）消除电路，所述传输系统包括多个n个线路终端（LT）调制解调器（Mi），将离散多音（DMT）符号Si传输到对应的网络 （NT）终端调制解调器（Mc（i））。 本发明提出在传输之前将矢量S =（Si）i = 1乘以预先补偿矩阵M使得矩阵乘积H * M为对角线，H为由n个下行传输信道定义的传输矩阵 R = H * S其中R =（Ri），i = 1至n，分别是由调制解调器Mc（i）分别接收的DMT符号Ri的向量。

公开(公告)号：EP1109328B1

公开(公告)日：2004-02-25

申请号：EP99410173.1

申请日：1999-12-14

Applicant: STMicroelectronics S.A. ,  STMicroelectronics N.V.

Inventor： Nordström, Thomas ,  Bengtsson, Daniel ,  Isson, Olivier

IPC: H04B3/32

CPC classification number: H04L25/03343 ,  H04B1/62 ,  H04B3/32 ,  H04L27/2601