DE3484088D1 - Simultane uebertragung von sprache und daten ueber einen analogen kanal. - Google Patents

Simultane uebertragung von sprache und daten ueber einen analogen kanal.

Info

Publication number
DE3484088D1
DE3484088D1 DE8484901669T DE3484088T DE3484088D1 DE 3484088 D1 DE3484088 D1 DE 3484088D1 DE 8484901669 T DE8484901669 T DE 8484901669T DE 3484088 T DE3484088 T DE 3484088T DE 3484088 D1 DE3484088 D1 DE 3484088D1
Authority
DE
Germany
Prior art keywords
language
data
simultaneous transmission
analogue channel
analogue
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 - Fee Related
Application number
DE8484901669T
Other languages
English (en)
Inventor
David Nash
Choong Wong
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
American Telephone and Telegraph Co 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 American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Application granted granted Critical
Publication of DE3484088D1 publication Critical patent/DE3484088D1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/20—Frequency-division multiplex systems in which at least one carrier is angle-modulated
    • 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
    • H04L27/3483—Modifications of the signal space to allow the transmission of additional information in order to transmit a subchannel using a modulation of the constellation points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data
DE8484901669T 1983-04-11 1984-04-02 Simultane uebertragung von sprache und daten ueber einen analogen kanal. Expired - Fee Related DE3484088D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/483,879 US4512013A (en) 1983-04-11 1983-04-11 Simultaneous transmission of speech and data over an analog channel
PCT/US1984/000484 WO1984004217A1 (en) 1983-04-11 1984-04-02 Simultaneous transmission of speech and data over an analog channel

Publications (1)

Publication Number Publication Date
DE3484088D1 true DE3484088D1 (de) 1991-03-14

Family

ID=23921872

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484901669T Expired - Fee Related DE3484088D1 (de) 1983-04-11 1984-04-02 Simultane uebertragung von sprache und daten ueber einen analogen kanal.

Country Status (7)

Country Link
US (1) US4512013A (de)
EP (1) EP0138988B1 (de)
JP (1) JPS60501087A (de)
CA (1) CA1215482A (de)
DE (1) DE3484088D1 (de)
IT (1) IT1209520B (de)
WO (1) WO1984004217A1 (de)

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Also Published As

Publication number Publication date
EP0138988B1 (de) 1991-02-06
EP0138988A4 (de) 1988-04-11
JPS60501087A (ja) 1985-07-11
WO1984004217A1 (en) 1984-10-25
EP0138988A1 (de) 1985-05-02
JPH0435090B2 (de) 1992-06-10
US4512013A (en) 1985-04-16
IT8420476A0 (it) 1984-04-10
CA1215482A (en) 1986-12-16
IT1209520B (it) 1989-08-30

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Free format text: BLUMBACH, KRAMER & PARTNER, 65193 WIESBADEN

8339 Ceased/non-payment of the annual fee