PT927469E - Sistema de comunicacoes de alta velocidade para ligacoes analogicas de um assinante - Google Patents
Sistema de comunicacoes de alta velocidade para ligacoes analogicas de um assinanteInfo
- Publication number
- PT927469E PT927469E PT98905109T PT98905109T PT927469E PT 927469 E PT927469 E PT 927469E PT 98905109 T PT98905109 T PT 98905109T PT 98905109 T PT98905109 T PT 98905109T PT 927469 E PT927469 E PT 927469E
- Authority
- PT
- Portugal
- Prior art keywords
- transmission
- compensation
- communication system
- endpoint
- telephone
- Prior art date
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
- H04L5/1438—Negotiation of transmission parameters prior to communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/4917—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/4917—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes
- H04L25/4927—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes using levels matched to the quantisation levels of the channel
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Quality & Reliability (AREA)
- Telephonic Communication Services (AREA)
- Communication Control (AREA)
- Interface Circuits In Exchanges (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/803,088 US5859872A (en) | 1994-12-09 | 1997-02-20 | High speed communications system for analog subscriber connections |
US08/804,784 US6233284B1 (en) | 1994-12-09 | 1997-02-20 | High speed communications system for analog subscriber connections |
US08/802,509 US6233275B1 (en) | 1994-12-09 | 1997-02-20 | High speed communications system for analog subscriber connections |
Publications (1)
Publication Number | Publication Date |
---|---|
PT927469E true PT927469E (pt) | 2006-06-30 |
Family
ID=27419986
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PT98905109T PT927469E (pt) | 1997-02-20 | 1998-02-19 | Sistema de comunicacoes de alta velocidade para ligacoes analogicas de um assinante |
Country Status (8)
Country | Link |
---|---|
EP (2) | EP1701498B1 (pt) |
JP (3) | JP3499571B2 (pt) |
AT (1) | ATE324718T1 (pt) |
CA (1) | CA2261635C (pt) |
DE (2) | DE69840765D1 (pt) |
ES (1) | ES2264194T3 (pt) |
PT (1) | PT927469E (pt) |
WO (1) | WO1998037657A2 (pt) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6084883A (en) * | 1997-07-07 | 2000-07-04 | 3Com Corporation | Efficient data transmission over digital telephone networks using multiple modulus conversion |
US5999109A (en) | 1997-06-09 | 1999-12-07 | 3Com Corporation | Frame-based spectral shaping method and apparatus |
US6212247B1 (en) | 1997-09-03 | 2001-04-03 | Conexant Systems, Inc. | Method and apparatus for generating a programmable synchronization signal for a data communication system |
US6332009B2 (en) * | 1997-09-03 | 2001-12-18 | Conexant Systems, Inc. | Method and apparatus for generating a line impairment learning signal for a data communication system |
EP0977410B1 (en) * | 1998-07-30 | 2003-02-19 | Infineon Technologies AG | Method for generating PCM code sets |
EP1001579A1 (en) | 1998-11-10 | 2000-05-17 | Siemens Aktiengesellschaft | Method and apparatus for determining properties of a signal transmission channel |
US6504865B1 (en) | 1999-02-24 | 2003-01-07 | Altocom, Inc. | Digital connection detection technique |
US6487243B1 (en) | 1999-03-08 | 2002-11-26 | International Business Machines Corporation | Modems, methods, and computer program products for recovering from errors in a tone reversal sequence between two modems |
US6661837B1 (en) | 1999-03-08 | 2003-12-09 | International Business Machines Corporation | Modems, methods, and computer program products for selecting an optimum data rate using error signals representing the difference between the output of an equalizer and the output of a slicer or detector |
US6341360B1 (en) | 1999-03-08 | 2002-01-22 | International Business Machines Corporation | Decision feedback equalizers, methods, and computer program products for detecting severe error events and preserving equalizer filter characteristics in response thereto |
US6389064B1 (en) | 1999-03-08 | 2002-05-14 | International Business Machines Corporation | Modems, methods, and computer program products for identifying a signaling alphabet in variance with an ideal alphabet due to digital impairments |
US7003030B2 (en) | 1999-03-08 | 2006-02-21 | Lenovo (Singapore) Pte. Ltd. | Receivers, methods, and computer program products for an analog modem that receives data signals from a digital modem |
KR20220027189A (ko) * | 2019-06-27 | 2022-03-07 | 노키아 테크놀로지스 오와이 | 송신기 알고리즘 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57170652A (en) * | 1981-04-15 | 1982-10-20 | Nec Corp | Transmitting system for burst signal |
DE69223508T2 (de) * | 1992-07-10 | 1998-06-25 | Ibm | Dezimationsfilter für einen Sigma-Delta-Wandler und A/D-Wandler mit einem solchen Filter |
US5394437A (en) * | 1992-10-20 | 1995-02-28 | At&T Corp. | High-speed modem synchronized to a remote CODEC |
US5528679A (en) * | 1994-01-27 | 1996-06-18 | Primary Access Corporation | Automatic detection of digital call paths in a telephone system |
DE69532919T2 (de) * | 1994-12-09 | 2005-04-14 | Townshend, Brent, Menlo Park | Schnelles vermittlungssystem für analoge teilnehmeranschlüsse |
US5757849A (en) * | 1995-03-30 | 1998-05-26 | Lucent Technologies Inc. | Timing recovery in a network-synchronized modem |
US5875229A (en) * | 1996-10-15 | 1999-02-23 | Motorola Inc. | System and device for, and method of, detecting, characterizing, and mitigating deterministic distortion in a communications network |
US5812602A (en) * | 1996-11-14 | 1998-09-22 | Motorola Inc. | System and device for, and method of, communicating according to a trellis code of baseband signals chosen from a fixed set of baseband signal points |
US5862184A (en) * | 1997-02-14 | 1999-01-19 | General Datacomm, Inc. | Mapper for high data rate transmission through channels subject to robbed bit signalling |
US6332009B2 (en) * | 1997-09-03 | 2001-12-18 | Conexant Systems, Inc. | Method and apparatus for generating a line impairment learning signal for a data communication system |
-
1998
- 1998-02-19 JP JP53680998A patent/JP3499571B2/ja not_active Expired - Lifetime
- 1998-02-19 EP EP06008173A patent/EP1701498B1/en not_active Expired - Lifetime
- 1998-02-19 DE DE69840765T patent/DE69840765D1/de not_active Expired - Lifetime
- 1998-02-19 PT PT98905109T patent/PT927469E/pt unknown
- 1998-02-19 CA CA002261635A patent/CA2261635C/en not_active Expired - Fee Related
- 1998-02-19 ES ES98905109T patent/ES2264194T3/es not_active Expired - Lifetime
- 1998-02-19 WO PCT/US1998/003093 patent/WO1998037657A2/en active IP Right Grant
- 1998-02-19 DE DE69834310T patent/DE69834310T2/de not_active Expired - Fee Related
- 1998-02-19 AT AT98905109T patent/ATE324718T1/de not_active IP Right Cessation
- 1998-02-19 EP EP98905109A patent/EP0927469B1/en not_active Expired - Lifetime
-
2003
- 2003-07-28 JP JP2003281140A patent/JP4078263B2/ja not_active Expired - Fee Related
-
2007
- 2007-02-26 JP JP2007046060A patent/JP4160097B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE69834310T2 (de) | 2007-01-18 |
CA2261635A1 (en) | 1998-08-27 |
EP0927469A2 (en) | 1999-07-07 |
EP1701498B1 (en) | 2009-04-15 |
JP2000504548A (ja) | 2000-04-11 |
EP1701498A2 (en) | 2006-09-13 |
DE69840765D1 (de) | 2009-05-28 |
WO1998037657A2 (en) | 1998-08-27 |
AU730207B2 (en) | 2001-03-01 |
EP0927469B1 (en) | 2006-04-26 |
DE69834310D1 (de) | 2006-06-01 |
JP2007215200A (ja) | 2007-08-23 |
CA2261635C (en) | 2002-07-16 |
JP2004135282A (ja) | 2004-04-30 |
JP4078263B2 (ja) | 2008-04-23 |
WO1998037657A3 (en) | 1999-01-07 |
JP3499571B2 (ja) | 2004-02-23 |
JP4160097B2 (ja) | 2008-10-01 |
EP1701498A3 (en) | 2006-11-08 |
ATE324718T1 (de) | 2006-05-15 |
AU6280798A (en) | 1998-09-09 |
ES2264194T3 (es) | 2006-12-16 |
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