MX9601092A - Aparato modulador-desmodulador y metodo para sincronizar un equipo de comunicaciones de datos a un reloj de una red. - Google Patents

Aparato modulador-desmodulador y metodo para sincronizar un equipo de comunicaciones de datos a un reloj de una red.

Info

Publication number
MX9601092A
MX9601092A MX9601092A MX9601092A MX9601092A MX 9601092 A MX9601092 A MX 9601092A MX 9601092 A MX9601092 A MX 9601092A MX 9601092 A MX9601092 A MX 9601092A MX 9601092 A MX9601092 A MX 9601092A
Authority
MX
Mexico
Prior art keywords
modem
network
qls
timing information
level
Prior art date
Application number
MX9601092A
Other languages
English (en)
Other versions
MXPA96001092A (es
Inventor
Ehud Alexander Gelblum
James Emery Mazo
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=23638185&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=MX9601092(A) "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 MX9601092A publication Critical patent/MX9601092A/es
Publication of MXPA96001092A publication Critical patent/MXPA96001092A/es

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0602—Systems characterised by the synchronising information used
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H04L7/046—Speed or phase control by synchronisation signals using special codes as synchronising signal using a dotting sequence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/04—Speed or phase control by synchronisation signals
    • H04L7/08—Speed or phase control by synchronisation signals the synchronisation signals recurring cyclically

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Telephonic Communication Services (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Communication Control (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

La presente invencion se refiere a una técnica de temporizacion para un modem de Muestreo del Nivel de Cuantificacion (QLS) que coloca la informacion de la temporizacion en una señal pulsada o pulsante, corriente abajo, transmitida desde la red telefonica conmutada publica (PSTN) en el modem de QLS. En respuesta a esta informacion de temporizacion, el modem de QLS se sincroniza con el reloj de muestreo de la red en la PSTN. En particular, la señal pulsada o pulsante incluye muestras que llevan los datos, las cuales fueron provistas por un modem de QLS del extremo alejado o remoto, y al menos una muestra que lleva los datos diferentes del usuario (NUDB), en la cual el nivel de esta muestra de NUDB se alterna periodicamente. El modem de QLS extrae la informacion de la temporizacion desde este nivel de la señal de alternamiento periodico para sincronizar el modem de QLS con el reloj de muestreo de la red.
MXPA/A/1996/001092A 1995-03-30 1996-03-25 Aparato modulador-desmodulador y metodo parasincronizar un equipo de comunicaciones de datos aun reloj de una red MXPA96001092A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/413,678 US5828696A (en) 1995-03-30 1995-03-30 Timing recovery in a network-synchronized modem
US08413678 1995-03-30

Publications (2)

Publication Number Publication Date
MX9601092A true MX9601092A (es) 1997-07-31
MXPA96001092A MXPA96001092A (es) 1997-12-01

Family

ID=

Also Published As

Publication number Publication date
US5828696A (en) 1998-10-27
US6094452A (en) 2000-07-25
EP0735717A2 (en) 1996-10-02
EP0735717A3 (en) 1999-04-28
IL117650A (en) 1999-08-17
CA2170930A1 (en) 1996-10-01
EP0735717B1 (en) 2004-08-11
IL117650A0 (en) 1996-07-23
DE69633084D1 (de) 2004-09-16
CA2170930C (en) 2002-01-29
JP3795125B2 (ja) 2006-07-12
CN1134637A (zh) 1996-10-30
JPH08288935A (ja) 1996-11-01
KR970068288A (ko) 1997-10-13
TW293219B (es) 1996-12-11
DE69633084T2 (de) 2005-07-28
KR100383785B1 (ko) 2003-07-18

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