EP1025654A1 - Verbesserungen in, oder bezüglich, digitaler übertragungen - Google Patents

Verbesserungen in, oder bezüglich, digitaler übertragungen

Info

Publication number
EP1025654A1
EP1025654A1 EP98953128A EP98953128A EP1025654A1 EP 1025654 A1 EP1025654 A1 EP 1025654A1 EP 98953128 A EP98953128 A EP 98953128A EP 98953128 A EP98953128 A EP 98953128A EP 1025654 A1 EP1025654 A1 EP 1025654A1
Authority
EP
European Patent Office
Prior art keywords
lines
telecommunications system
fdd
employed
stream
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98953128A
Other languages
English (en)
French (fr)
Inventor
Gunnar Bahlenberg
Daniel Bengtsson
Siwert Hakansson
Anders Isaksson
Lars- Ke Isaksson
Mikael Isaksson
Magnus Johansson
Mauritz Lahti
Lis-Marie Ljunggren
Hans Lundberg
Tomas NORDSTRÖM
Lennart Olsson
Sven-Rune Olofsson
Tomas Stefansson
Hans ÖMAN
Göran ÖKVIST
Per ÖDLING
Petra Dentgen
Frank SJÖBERG
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STMicroelectronics NV
Original Assignee
Telia AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telia AB filed Critical Telia AB
Publication of EP1025654A1 publication Critical patent/EP1025654A1/de
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/143—Two-way operation using the same type of signal, i.e. duplex for modulated signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/023—Multiplexing of multicarrier modulation signals

Definitions

  • OFDD Orthogonal Frequency Divided Duplex
  • VDSL Very high rate Digital Subscriber Line
  • FDD FDD
  • NEXT is not a problem, provided that the separate frequency bands are filtered out properly
  • FDD has the disadvantage that it is a static duplex scheme and it is not, therefore, possible to change the up-stream and down-stream bands without changing filters.
  • the advantage of OFDD is that dynamic up-stream and down-stream allocation can be employed without increasing NEXT.
  • OFDD has the disadvantage that an extended cyclic prefix must be used and this becomes large for longer lines, resulting in lost capacity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Optical Communication System (AREA)
  • Telephonic Communication Services (AREA)
EP98953128A 1997-11-03 1998-10-30 Verbesserungen in, oder bezüglich, digitaler übertragungen Withdrawn EP1025654A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9704009A SE510641C2 (sv) 1997-11-03 1997-11-03 Digital överföring i telekommunikationssystem
SE9704009 1997-11-03
PCT/SE1998/001973 WO1999023764A1 (en) 1997-11-03 1998-10-30 Improvements in, or relating to, digital transmission

Publications (1)

Publication Number Publication Date
EP1025654A1 true EP1025654A1 (de) 2000-08-09

Family

ID=20408838

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98953128A Withdrawn EP1025654A1 (de) 1997-11-03 1998-10-30 Verbesserungen in, oder bezüglich, digitaler übertragungen

Country Status (6)

Country Link
EP (1) EP1025654A1 (de)
JP (1) JP2001522190A (de)
EE (1) EE200000183A (de)
NO (1) NO20002138L (de)
SE (1) SE510641C2 (de)
WO (1) WO1999023764A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9900788L (sv) * 1998-11-21 2000-05-22 Telia Ab Förbättringar av, eller med avseende på, VDSL- transmissionssystem
FR2825860B1 (fr) * 2001-06-06 2005-03-18 St Microelectronics Sa Transmission de donnees en maitre-esclave en multiplexage par division de frequences orthogonales
FR2825861A1 (fr) 2001-06-06 2002-12-13 St Microelectronics Sa Allocation de frequences en modulation multiporteuses orthogonales
FR2825859A1 (fr) * 2001-06-06 2002-12-13 St Microelectronics Sa Procede de transmission de donnees en multiplexage par division de frequences orthogonales
EP1313255A3 (de) * 2001-11-19 2006-09-20 Alcatel Verfahren zur Verteilung von Arbeitstonen zwischen Teilnehmeranschlüsse
KR100447242B1 (ko) * 2002-01-31 2004-09-04 주식회사 휴커넥스 Ｄｍｔ 방식의 ｖｄｓｌ 시스템 및 이 시스템에서의 주기적 프리픽스 샘플 길이 결정 방법
KR101585846B1 (ko) * 2013-12-31 2016-01-15 주식회사 엔젤해피 직교 주파수 분할 듀플렉싱을 이용한 무선 송수신 장치 및 방법

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9502775L (sv) * 1995-08-04 1997-02-05 Telia Ab Förfarande för att undertrycka näröverhörning vid dubbelriktad kommunikation i trådnät

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9923764A1 *

Also Published As

Publication number Publication date
SE9704009L (sv) 1999-05-04
NO20002138D0 (no) 2000-04-27
JP2001522190A (ja) 2001-11-13
WO1999023764A1 (en) 1999-05-14
NO20002138L (no) 2000-06-29
SE510641C2 (sv) 1999-06-14
EE200000183A (et) 2001-04-16
SE9704009D0 (sv) 1997-11-03

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