公开(公告)号：DE69925178D1

公开(公告)日：2005-06-16

申请号：DE69925178

申请日：1999-01-26

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DAGDEVIREN NURI RUHI ,  KUSTKA GEORGE JOHN ,  LAROIA RAJIV ,  WANG JIN-DER

IPC: H04J11/00 ,  H04L5/02 ,  H04L5/14

Abstract: An Asymmetric Digital Subscriber Loop (ADSL) Discrete Multi-Tone system has disjoint and adjacent upstream and downstream channels. During the training phase of an ADSL connection, an ADSL DMT transmitter first determines a round trip propagation delay by transmitting a ranging signal to a far-end ADSL endpoint. During the subsequent communications phase, the ADSL transmitter synchronizes transmission of DMT symbols to a reference clock. In addition, the cyclic extensions of each DMT symbol are increased as a function of the propagation delay.

公开(公告)号：CA2258412A1

公开(公告)日：1999-08-03

申请号：CA2258412

申请日：1999-01-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KUSTKA GEORGE JOHN ,  WANG JIN-DER ,  LAROIA RAJIV ,  DAGDEVIREN NURI RUHI

IPC: H04J11/00 ,  H04L5/02 ,  H04L5/14 ,  H04J1/00

Abstract: An Asymmetric Digital Subscriber Loop (ADSL) Discrete Multi-Tone system has disjoint and adjacent upstream and downstream channels. During the training phase of an ADSL connection, an ADSL DMT transmitter first determines a round trip propagation delay by transmitting a ranging signal to a far-end ADSL endpoint. During the subsequent communications phase, the ADSL transmitter synchronizes transmission of DMT symbols to a reference clock. In addition, the cyclic extensions of each DMT symbol are increased as a function of the propagation delay.

公开(公告)号：CA2258412C

公开(公告)日：2006-12-12

申请号：CA2258412

申请日：1999-01-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KUSTKA GEORGE JOHN ,  LAROIA RAJIV ,  WANG JIN-DER ,  DAGDEVIREN NURI RUHI

IPC: H04J11/00 ,  H04J1/00 ,  H04L5/02 ,  H04L5/14

Abstract: An Asymmetric Digital Subscriber Loop (ADSL) Discrete Multi-Tone system h as disjoint and adjacent upstream and downstream channels. During the training phase of an ADSL connection, an ADSL DMT transmitter first determines a round trip propagation delay by transmitting a ranging signal to a far-end ADSL endpoint. During th e subsequent communications phase, the ADSL transmitter synchronizes transmission of DMT symbols to a reference clock. In addition, the cyclic extensions of each DMT symbol are increased as a function of the propagation delay.

公开(公告)号：DE69925178T2

公开(公告)日：2006-02-23

申请号：DE69925178

申请日：1999-01-26

Applicant: LUCENT TECHNOLOGIES INC

Inventor： DAGDEVIREN NURI RUHI ,  KUSTKA GEORGE JOHN ,  LAROIA RAJIV ,  WANG JIN-DER

IPC: H04J11/00 ,  H04L5/02 ,  H04L5/14

Abstract: An Asymmetric Digital Subscriber Loop (ADSL) Discrete Multi-Tone system has disjoint and adjacent upstream and downstream channels. During the training phase of an ADSL connection, an ADSL DMT transmitter first determines a round trip propagation delay by transmitting a ranging signal to a far-end ADSL endpoint. During the subsequent communications phase, the ADSL transmitter synchronizes transmission of DMT symbols to a reference clock. In addition, the cyclic extensions of each DMT symbol are increased as a function of the propagation delay.