EP1025654A1 - Verbesserungen in, oder bezüglich, digitaler übertragungen - Google Patents
Verbesserungen in, oder bezüglich, digitaler übertragungenInfo
- 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- Withdrawn
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)
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)
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)
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 |
-
1997
- 1997-11-03 SE SE9704009A patent/SE510641C2/sv not_active IP Right Cessation
-
1998
- 1998-10-30 JP JP2000519509A patent/JP2001522190A/ja active Pending
- 1998-10-30 EP EP98953128A patent/EP1025654A1/de not_active Withdrawn
- 1998-10-30 EE EEP200000183A patent/EE200000183A/xx unknown
- 1998-10-30 WO PCT/SE1998/001973 patent/WO1999023764A1/en not_active Application Discontinuation
-
2000
- 2000-04-27 NO NO20002138A patent/NO20002138L/no unknown
Non-Patent Citations (1)
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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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20000605 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): CH DE DK ES FI FR GB IT LI NL SE |
|
AX | Request for extension of the european patent |
Free format text: LT PAYMENT 20000605;LV PAYMENT 20000605 |
|
17Q | First examination report despatched |
Effective date: 20010402 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: STMICROELECTRONICS N.V. |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20021211 |