EP0367897A3 - Method for the simultaneous transmission of digital data signals in band-limited transmission channels - Google Patents

Method for the simultaneous transmission of digital data signals in band-limited transmission channels Download PDF

Info

Publication number
EP0367897A3
EP0367897A3 EP19890108348 EP89108348A EP0367897A3 EP 0367897 A3 EP0367897 A3 EP 0367897A3 EP 19890108348 EP19890108348 EP 19890108348 EP 89108348 A EP89108348 A EP 89108348A EP 0367897 A3 EP0367897 A3 EP 0367897A3
Authority
EP
European Patent Office
Prior art keywords
data signals
rounded
time
band
digital data
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.)
Withdrawn
Application number
EP19890108348
Other languages
German (de)
French (fr)
Other versions
EP0367897A2 (en
Inventor
Dietmar Prof. Dr. Rudolph
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.)
Telefunken Sendertechnik GmbH
Original Assignee
Telefunken Sendertechnik GmbH
Licentia Patent Verwaltungs GmbH
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 Telefunken Sendertechnik GmbH, Licentia Patent Verwaltungs GmbH filed Critical Telefunken Sendertechnik GmbH
Publication of EP0367897A2 publication Critical patent/EP0367897A2/en
Publication of EP0367897A3 publication Critical patent/EP0367897A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
    • H04H20/36—Arrangements for simultaneous broadcast of plural pieces of information for AM broadcasts

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)

Abstract

Die Erfindung betrifft ein Verfahren zur zusätzlichen Übertragung von digitalen Daten in bandbegrenzten Übertra­ gungskanälen. Bei dem Verfahren werden zur Erzielung eines ausreichenden Mindest-Störabstandes zwischen Datensignalen und den anderen zu übertragenden Signalen die Datensignale vor der Übertragung verrundet. Die Amplitude der erfin­ dungsgemäßen Kurvenform für verrundete Datensignale nehmen im Zeitbereich nur in einem inneren Bereich von etwa 75 % der doppelten Bitbreite eines Einzelbits Werte verschieden von Null an und sind sonst Null. Die Zeitfunktion f(t) der verrundeten Datensignalfolgen weist keine Einsattelungen mehr auf, die Zahl der Extrema der ersten zeitlichen Ab­ leitung f′(t) ist geringer als die Zahl der Extrema der ersten zeitlichen Ableitung F′(t) einer vergleichbar, aber gemäß EBU-Vorschrift gerundeten Zeitfunktion F(t). Eine bevorzugte Anwendung der Erfindung ist AM-RDS. Die Vor­ teile des erfindungsgemäßen Verfahrens bestehen vor allem in der minimalen PM → AM-Konversion und in dem optimalen Augenmuster. The invention relates to a method for additional Transmission of digital data in band-limited transmissions channels. In the process to achieve a sufficient minimum signal-to-noise ratio between data signals and the other signals to be transmitted the data signals rounded before transmission. The amplitude of the invented take waveform according to the invention for rounded data signals in the time domain only in an inner area of about 75% the double bit width of a single bit values different from zero and are otherwise zero. The time function f (t) of the rounded data signal sequences have no indentations more on, the number of extremes of the first time Ab line f ′ (t) is less than the number of extremes first time derivative F '(t) comparable, but time function F (t) rounded according to EBU regulation. A preferred application of the invention is AM-RDS. The before parts of the method according to the invention exist above all in the minimal PM → AM conversion and in the optimal one Eye pattern.

EP19890108348 1988-11-11 1989-05-10 Method for the simultaneous transmission of digital data signals in band-limited transmission channels Withdrawn EP0367897A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19883838226 DE3838226A1 (en) 1988-11-11 1988-11-11 METHOD FOR THE ADDITIONAL TRANSMISSION OF DIGITAL DATA IN BAND-LIMITED TRANSMISSION CHANNELS
DE3838226 1988-11-11

Publications (2)

Publication Number Publication Date
EP0367897A2 EP0367897A2 (en) 1990-05-16
EP0367897A3 true EP0367897A3 (en) 1991-10-02

Family

ID=6366937

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890108348 Withdrawn EP0367897A3 (en) 1988-11-11 1989-05-10 Method for the simultaneous transmission of digital data signals in band-limited transmission channels

Country Status (3)

Country Link
EP (1) EP0367897A3 (en)
DE (1) DE3838226A1 (en)
DK (1) DK324289A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4239509A1 (en) * 1992-11-25 1994-05-26 Daimler Benz Ag Method and receiver for terrestrial digital broadcast transmission

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2096424A (en) * 1981-04-01 1982-10-13 Philips Nv Transmitter for angel-modulated signals
DE3616864A1 (en) * 1985-09-25 1987-04-02 Verkehrswesen Hochschule Modified AM sound broadcasting system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2096424A (en) * 1981-04-01 1982-10-13 Philips Nv Transmitter for angel-modulated signals
DE3616864A1 (en) * 1985-09-25 1987-04-02 Verkehrswesen Hochschule Modified AM sound broadcasting system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
IEEE TRANS. ON. COMM., Band COM-28, Nr. 6, Juni 1980, Seiten 889-897, IEEE, New York, US; H. YAZDANI et al.: "Constant envelope bandlimited BPSK signal" *
TELECOMMUNICATIONS AND RADIO ENGINEERING, Band 24, Nr. 7, Juni 1970, Seiten 30-32, Scripta Publishing Co., Washington, DC, US; G.B. SELEZNEV et al.: "Automatic stepped carrier adjustment" *

Also Published As

Publication number Publication date
DK324289D0 (en) 1989-06-29
DK324289A (en) 1990-05-12
EP0367897A2 (en) 1990-05-16
DE3838226A1 (en) 1990-05-17

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