DE68919250D1 - Verfahren und Vorrichtung zur Breitband-Übertragung von digitalen Signalen zwischen einer Telefonvermittlungsanlage und den Endeinrichtungen. - Google Patents

Verfahren und Vorrichtung zur Breitband-Übertragung von digitalen Signalen zwischen einer Telefonvermittlungsanlage und den Endeinrichtungen.

Info

Publication number
DE68919250D1
DE68919250D1 DE68919250T DE68919250T DE68919250D1 DE 68919250 D1 DE68919250 D1 DE 68919250D1 DE 68919250 T DE68919250 T DE 68919250T DE 68919250 T DE68919250 T DE 68919250T DE 68919250 D1 DE68919250 D1 DE 68919250D1
Authority
DE
Germany
Prior art keywords
terminals
digital signals
telephone exchange
broadband transmission
broadband
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.)
Expired - Lifetime
Application number
DE68919250T
Other languages
English (en)
Other versions
DE68919250T2 (de
DE68919250T3 (de
Inventor
Richard Dennis Gitlin
Sailesh Krishna Rao
Jean-Jacques Werner
Nicholas Zervos
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.)
AT&T Corp
Original Assignee
AT&T Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22624555&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE68919250(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by AT&T Corp filed Critical AT&T Corp
Publication of DE68919250D1 publication Critical patent/DE68919250D1/de
Publication of DE68919250T2 publication Critical patent/DE68919250T2/de
Application granted granted Critical
Publication of DE68919250T3 publication Critical patent/DE68919250T3/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
    • H04L27/3416—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes
    • H04L27/3427—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes in which the constellation is the n - fold Cartesian product of a single underlying two-dimensional constellation
    • H04L27/3438—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power in which the information is carried by both the individual signal points and the subset to which the individual points belong, e.g. using coset coding, lattice coding, or related schemes in which the constellation is the n - fold Cartesian product of a single underlying two-dimensional constellation using an underlying generalised cross constellation
    • 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
    • H04L25/4919—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 balanced multilevel codes
    • H04L25/4921—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 balanced multilevel codes using quadrature encoding, e.g. carrierless amplitude-phase coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Interface Circuits In Exchanges (AREA)
DE68919250T 1988-03-22 1989-03-16 Verfahren und Vorrichtung zur Breitband-Übertragung von digitalen Signalen zwischen einer Telefonvermittlungsanlage und den Endeinrichtungen. Expired - Lifetime DE68919250T3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US171636 1988-03-22
US07/171,636 US4924492A (en) 1988-03-22 1988-03-22 Method and apparatus for wideband transmission of digital signals between, for example, a telephone central office and customer premises

Publications (3)

Publication Number Publication Date
DE68919250D1 true DE68919250D1 (de) 1994-12-15
DE68919250T2 DE68919250T2 (de) 1995-06-08
DE68919250T3 DE68919250T3 (de) 2007-06-21

Family

ID=22624555

Family Applications (1)

Application Number Title Priority Date Filing Date
DE68919250T Expired - Lifetime DE68919250T3 (de) 1988-03-22 1989-03-16 Verfahren und Vorrichtung zur Breitband-Übertragung von digitalen Signalen zwischen einer Telefonvermittlungsanlage und den Endeinrichtungen.

Country Status (8)

Country Link
US (1) US4924492A (de)
EP (1) EP0334549B2 (de)
JP (1) JP2547844B2 (de)
CA (1) CA1304848C (de)
DE (1) DE68919250T3 (de)
ES (1) ES2063123T5 (de)
HK (1) HK49096A (de)
SG (1) SG30538G (de)

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Also Published As

Publication number Publication date
JPH0211057A (ja) 1990-01-16
US4924492A (en) 1990-05-08
EP0334549B2 (de) 2006-12-06
EP0334549A3 (en) 1990-05-23
ES2063123T3 (es) 1995-01-01
DE68919250T2 (de) 1995-06-08
HK49096A (en) 1996-03-29
SG30538G (en) 1995-08-18
ES2063123T5 (es) 2007-08-01
CA1304848C (en) 1992-07-07
JP2547844B2 (ja) 1996-10-23
DE68919250T3 (de) 2007-06-21
EP0334549B1 (de) 1994-11-09
EP0334549A2 (de) 1989-09-27

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