EP 1025654 A1 20000809 - IMPROVEMENTS IN, OR RELATING TO, DIGITAL TRANSMISSION
Title (en)
IMPROVEMENTS IN, OR RELATING TO, DIGITAL TRANSMISSION
Title (de)
VERBESSERUNGEN IN, ODER BEZÜGLICH, DIGITALER ÜBERTRAGUNGEN
Title (fr)
AMELIORATIONS APPORTEES A DES TRANSMISSIONS NUMERIQUES
Publication
Application
Priority
- SE 9801973 W 19981030
- SE 9704009 A 19971103
Abstract (en)
[origin: WO9923764A1] The present invention combines the advantages of OFDD with Frequency Divided Duplex (FDD), thus enabling the reach of a vdsl transmission system to be extended. The present invention requires that: the use of an extra cyclic prefix; and for longer lines, the frequencies above the FDD band are not used, in other words. This in turn means that: time-synchronisation is performed between all transmitters in the ONUs and the NTs; timing advance is calculated from the line length; and different sub-carriers are used in up-stream and down-stream directions.
IPC 1-7
IPC 8 full level
H04B 3/02 (2006.01); H04B 3/50 (2006.01); H04J 11/00 (2006.01); H04L 5/02 (2006.01); H04L 5/14 (2006.01)
CPC (source: EP)
H04L 5/023 (2013.01); H04L 5/143 (2013.01)
Citation (search report)
See references of WO 9923764A1
Designated contracting state (EPC)
CH DE DK ES FI FR GB IT LI NL SE
DOCDB simple family (publication)
WO 9923764 A1 19990514; EE 200000183 A 20010416; EP 1025654 A1 20000809; JP 2001522190 A 20011113; NO 20002138 D0 20000427; NO 20002138 L 20000629; SE 510641 C2 19990614; SE 9704009 D0 19971103; SE 9704009 L 19990504
DOCDB simple family (application)
SE 9801973 W 19981030; EE P200000183 A 19981030; EP 98953128 A 19981030; JP 2000519509 A 19981030; NO 20002138 A 20000427; SE 9704009 A 19971103