Global Patent Index - EP 1238472 A1

EP 1238472 A1 2002-09-11 - METHOD AND SYSTEM FOR COMPENSATING FOR SIGNAL ECHOES THAT OCCUR IN DUPLEX DATA TRANSMISSION DURING DISCRETE MULTI-TONE MODULATION

Title (en)

METHOD AND SYSTEM FOR COMPENSATING FOR SIGNAL ECHOES THAT OCCUR IN DUPLEX DATA TRANSMISSION DURING DISCRETE MULTI-TONE MODULATION

Title (de)

VERFAHREN UND ANORDNUNG ZUR KOMPENSATION VON SIGNALECHOS BEI DER DUPLEX-DATENÜBERTRAGUNG BEI DER DISKRETEN MULTITONMODULATION

Title (fr)

PROCEDE ET SYSTEME POUR COMPENSER L'ECHO DE SIGNAL DANS LA TRANSMISSION DE DONNEES EN DUPLEX LORS DE LA MODULATION DISCRETE PAR OSCILLATEUR MULTISONORE

Publication

EP 1238472 A1 (DE)

Application

EP 00981330 A

Priority

  • DE 19960242 A
  • EP 0012118 W

Abstract (en)

[origin: WO0145292A1] The inventive method provides that during an initialization phase of a data transmission with discrete multi-tone modulation in the range of frequencies, a first error of a first reference channel is determined from the difference between a transmit value and a receive value of a signal of this channel and is used for correcting the remaining frequency channels. The first reference channel is corrected using the error of a second reference channel.

IPC 1-7 (main, further and additional classification)

H04B 3/23

IPC 8 full level (invention and additional information)

H04J 11/00 (2006.01); H04B 3/20 (2006.01); H04B 3/23 (2006.01)

CPC (invention and additional information)

H04B 3/238 (2013.01); H04B 3/23 (2013.01)

Citation (search report)

See references of WO 0145292A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

EPO simple patent family

WO 0145292 A1 20010621; CN 1180544 C 20041215; CN 1402912 A 20030312; DE 19960242 C1 20010621; EP 1238472 A1 20020911; JP 2003517249 A 20030520; US 2003012291 A1 20030116; US 7042953 B2 20060509

INPADOC legal status


2005-01-26 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20040720

2004-03-25 [REG DE 8566] DESIGNATED COUNTRY DE NOT LONGER VALID

2004-02-18 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20040105

2002-09-11 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20020529

2002-09-11 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR