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 assinante

Info

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
Application number
PT98905109T
Other languages
English (en)
Inventor
Brent Townshend
Original Assignee
Brent Townshend
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
Priority claimed from US08/803,088 external-priority patent/US5859872A/en
Priority claimed from US08/802,509 external-priority patent/US6233275B1/en
Application filed by Brent Townshend filed Critical Brent Townshend
Publication of PT927469E publication Critical patent/PT927469E/pt

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)
PT98905109T 1997-02-20 1998-02-19 Sistema de comunicacoes de alta velocidade para ligacoes analogicas de um assinante PT927469E (pt)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

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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