HK1033870A1 - Method and apparatus for sychronizing a data communication system to a periodic digital impairment. - Google Patents

Method and apparatus for sychronizing a data communication system to a periodic digital impairment.

Info

Publication number
HK1033870A1
HK1033870A1 HK01103247A HK01103247A HK1033870A1 HK 1033870 A1 HK1033870 A1 HK 1033870A1 HK 01103247 A HK01103247 A HK 01103247A HK 01103247 A HK01103247 A HK 01103247A HK 1033870 A1 HK1033870 A1 HK 1033870A1
Authority
HK
Hong Kong
Prior art keywords
sychronizing
communication system
data communication
periodic digital
digital impairment
Prior art date
Application number
HK01103247A
Other languages
English (en)
Inventor
Sverrir Olafsson
Original Assignee
Conexant Systems Inc
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
Application filed by Conexant Systems Inc filed Critical Conexant Systems Inc
Publication of HK1033870A1 publication Critical patent/HK1033870A1/xx

Links

Classifications

    • 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
    • H04J3/12—Arrangements providing for calling or supervisory signals
    • H04J3/125—One of the channel pulses or the synchronisation pulse is also used for transmitting monitoring or supervisory signals
    • 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
    • H04L27/345—Modifications of the signal space to allow the transmission of additional information
    • H04L27/3461—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel
    • H04L27/3472—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel by switching between alternative constellations
HK01103247A 1998-01-20 2001-05-08 Method and apparatus for sychronizing a data communication system to a periodic digital impairment. HK1033870A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/009,228 US6023493A (en) 1998-01-20 1998-01-20 Method and apparatus for synchronizing a data communication system to a periodic digital impairment
PCT/US1999/001005 WO1999037051A2 (en) 1998-01-20 1999-01-19 Method and apparatus for synchronizing a data communication system to a periodic digital impairment

Publications (1)

Publication Number Publication Date
HK1033870A1 true HK1033870A1 (en) 2001-09-28

Family

ID=21736372

Family Applications (1)

Application Number Title Priority Date Filing Date
HK01103247A HK1033870A1 (en) 1998-01-20 2001-05-08 Method and apparatus for sychronizing a data communication system to a periodic digital impairment.

Country Status (5)

Country Link
US (3) US6023493A (de)
EP (1) EP1050127B1 (de)
DE (1) DE69919982T2 (de)
HK (1) HK1033870A1 (de)
WO (1) WO1999037051A2 (de)

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Also Published As

Publication number Publication date
DE69919982T2 (de) 2005-09-29
US6023493A (en) 2000-02-08
WO1999037051A3 (en) 2000-08-24
WO1999037051A2 (en) 1999-07-22
EP1050127B1 (de) 2004-09-08
US6081567A (en) 2000-06-27
DE69919982D1 (de) 2004-10-14
USRE38678E1 (en) 2004-12-28
EP1050127A2 (de) 2000-11-08

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Legal Events

Date Code Title Description
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20140119