EP0118710A1 - Dispositif de synchronisation pour les signaux utiles d'un système de radiodiffusion sur fréquence commune - Google Patents

Dispositif de synchronisation pour les signaux utiles d'un système de radiodiffusion sur fréquence commune Download PDF

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Publication number
EP0118710A1
EP0118710A1 EP84100933A EP84100933A EP0118710A1 EP 0118710 A1 EP0118710 A1 EP 0118710A1 EP 84100933 A EP84100933 A EP 84100933A EP 84100933 A EP84100933 A EP 84100933A EP 0118710 A1 EP0118710 A1 EP 0118710A1
Authority
EP
European Patent Office
Prior art keywords
signal
useful
intelligence
synchronous
modulation
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.)
Granted
Application number
EP84100933A
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German (de)
English (en)
Other versions
EP0118710B1 (fr
Inventor
Harry Koch
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.)
Bosch Telecom GmbH
Original Assignee
ANT Nachrichtentechnik 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 ANT Nachrichtentechnik GmbH filed Critical ANT Nachrichtentechnik GmbH
Publication of EP0118710A1 publication Critical patent/EP0118710A1/fr
Application granted granted Critical
Publication of EP0118710B1 publication Critical patent/EP0118710B1/fr
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/67—Common-wave systems, i.e. using separate transmitters operating on substantially the same frequency

Definitions

  • the invention relates to a synchronization device according to the preamble of claim 1.
  • the time-synchronous and in-phase transmission of the useful signal is a requirement. If the useful signal transmitters of the single-frequency radio system arranged in spatially distributed transmission stations receive the useful signal from a control center via modulation feeders of different lengths, their runtimes are determined according to the prior art and all modulation feeders are matched to the longest transmission runtime using delay devices.
  • a test signal is not used for time comparison, which must also be stored in the individual transmitter stations and a separate synchronization signal must be obtained from an external transmitter at the start, but that only a single signal, here referred to as a synchronous signal, is required, which is emitted by a common, wireless synchronous signal transmitter, which is preferably located in the central office. From here, the synchronizing signal becomes wireless once and transmitted once via the associated modulation feeder to each of the transmitting stations. There's a wireless sync there. signal receiver available.
  • the synchronous signal transmitter and the synchronous signal receiver operate at the operating frequency of the single-frequency radio system on which the transmission of the useful signals also takes place; as a result, it is possible to install a useful signal receiver as a synchronous signal receiver, such as is present in large numbers on the receiving side of the single-frequency radio system, for example as a mobile receiver.
  • a useful signal transmitter can be used as a synchronous signal transmitter, as is to be installed in any transmitting station anyway. Furthermore, the use of only one transmission frequency results in good frequency economy.
  • the time-of-flight comparator present in each transmission station which compares the time between the wirelessly received synchronization signal and the synchronization signal supplied via a modulation feeder, controls a delay device which is arranged between the modulation feeder and the useful signal transmitter of the transmission station.
  • the resulting automatic runtime comparison between the control center and the useful signal transmitter can take place in stages and should be carried out with a residual error of less than 50 microseconds. Before the start of each useful signal transmission, such a transit time comparison can be carried out with the aid of a synchronous signal.
  • the synchronous signal consists of a carrier wave train modulated in the envelope curve.
  • a rough adjustment signal is derived from the envelope curve in the transit time comparator and a fine adjustment signal for the delay device is derived from the carrier frequency train.
  • Envelope and carrier wave train are transmitted from the synchronous signal to the synchronous signal in phase synchronization from the control center. The on the operating frequency for the useful signals of the useful signal The synchronous signals are sent out at a fixed time interval before each useful signal is sent.
  • useful signals are sent to the single-frequency radio system via a call processor RP, which arrive at a center Z. From here, they are fed via modulation feeders M1, M2, M3, ... to individual transmission stations S1, S2, S3, ... These modulation feeders belong to a network of modulation feeders within which line switching can occur, with the result that the runtime changes from the central station to a specific transmitting station. A runtime compensation is therefore required in each transmitter station so that the useful signal transmissions by the individual transmitter stations ultimately take place synchronously. For this reason, for example, the transmission station S1 contains a controllable delay direction V3 between its associated modulation feeder M1 and its useful signal transmitter Sn 1.
  • the control is carried out by a runtime comparator K, to which, on the one hand, synchronization signals from the modulation feeder M1 are fed for the runtime comparison.
  • the runtime comparator contains wirelessly received synchronization signals from a synchronization signal receiver Es 1 contained in the transmission station S1.
  • the central station Z sends a synchronizing signal A (see also FIG. 2) both to the modulation feeder Ml (and of course to the other modulation feeders) and via a delay element V1 with a delay time T1 to a synchronous signal transmitter Ss zul wireless transmission to the individual synchronous receivers Es etc.
  • a synchronizing signal A see also FIG. 2
  • the wirelessly transmitted synchronous signal arrives essentially after the time T1 if the remaining running times of the wireless transmission path are neglected.
  • the synchronization signal transmitted via the modulation feeder M1 reaches the runtime comparator after the runtime T2.
  • T1 is chosen so large that it is at least as long as the largest modulation feeder run time between the center and a transmitting station.
  • the delay element V1 can also be located between the synchronous signal receiver Es 1 and the runtime comparator K, where it is therefore shown again with broken lines.
  • the same transmitter can be used as the synchronous signal transmitter Ss, as is provided in the individual transmitter stations as the useful signal transmitter Sn 1.
  • the same receiver can be used as the synchronous signal receiver Es 1 in the transmitting stations as it is provided on the receiving side of the useful signals as a mobile useful signal receiver En, for example. Since the useful signal transmitters and in particular the useful signal receivers are to be provided in large numbers in a single-frequency radio system and can therefore be manufactured relatively cheaply, the synchronization device equipped with such a transmitter as a synchronous signal transmitter or with such receivers as a synchronous signal receiver can be set up inexpensively.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Circuits Of Receivers In General (AREA)
EP84100933A 1983-03-12 1984-01-31 Dispositif de synchronisation pour les signaux utiles d'un système de radiodiffusion sur fréquence commune Expired EP0118710B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3308957 1983-03-12
DE3308957 1983-03-12

Publications (2)

Publication Number Publication Date
EP0118710A1 true EP0118710A1 (fr) 1984-09-19
EP0118710B1 EP0118710B1 (fr) 1986-10-01

Family

ID=6193355

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84100933A Expired EP0118710B1 (fr) 1983-03-12 1984-01-31 Dispositif de synchronisation pour les signaux utiles d'un système de radiodiffusion sur fréquence commune

Country Status (4)

Country Link
EP (1) EP0118710B1 (fr)
DE (1) DE3460839D1 (fr)
ES (1) ES8503902A1 (fr)
PT (1) PT78223B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0198448A1 (fr) * 1985-04-19 1986-10-22 Firma Erika Köchler Méthode pour la synchronisation de plusieurs émetteurs-récepteurs cadencés
EP0436875A2 (fr) * 1990-01-10 1991-07-17 Rohde & Schwarz GmbH & Co. KG Système radio à ondes communes
US5124698A (en) * 1985-04-10 1992-06-23 Tecnomen Oy Method and apparatus for synchronizing radio transmitters in a paging network
EP0570547A1 (fr) * 1991-12-06 1993-11-24 Motorola, Inc. Procede de mesure de retard de canal
FR3020225A1 (fr) * 2014-04-18 2015-10-23 Tdf Dispositif de diffusion radio synchronisee par modulation de frequences

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040731A1 (fr) * 1980-05-28 1981-12-02 Licentia Patent-Verwaltungs-GmbH Méthode et dispositif pour la transmission simultanée d'informations par plusieurs émetteurs à ondes communes
EP0042144A1 (fr) * 1980-06-14 1981-12-23 Licentia Patent-Verwaltungs-GmbH Méthode et dispositif pour la transmission simultanée d'informations par plusieurs émetteurs à ondes communes
DE3035679A1 (de) * 1980-09-22 1982-05-06 Siemens AG, 1000 Berlin und 8000 München Verfahren und schaltungsanordnung zum einstellen der zeitpunkte des aussendens von signalen von gleichwellen-funksendern, insbesondere einer fahrzeugverkehrsleitanlage
EP0072984A1 (fr) * 1981-08-21 1983-03-02 Licentia Patent-Verwaltungs-GmbH Procédé de déterminiation automatique de l'égalisation des temps de propagation, dans un réseau-radio à ondes communes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040731A1 (fr) * 1980-05-28 1981-12-02 Licentia Patent-Verwaltungs-GmbH Méthode et dispositif pour la transmission simultanée d'informations par plusieurs émetteurs à ondes communes
EP0042144A1 (fr) * 1980-06-14 1981-12-23 Licentia Patent-Verwaltungs-GmbH Méthode et dispositif pour la transmission simultanée d'informations par plusieurs émetteurs à ondes communes
DE3035679A1 (de) * 1980-09-22 1982-05-06 Siemens AG, 1000 Berlin und 8000 München Verfahren und schaltungsanordnung zum einstellen der zeitpunkte des aussendens von signalen von gleichwellen-funksendern, insbesondere einer fahrzeugverkehrsleitanlage
EP0072984A1 (fr) * 1981-08-21 1983-03-02 Licentia Patent-Verwaltungs-GmbH Procédé de déterminiation automatique de l'égalisation des temps de propagation, dans un réseau-radio à ondes communes

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5124698A (en) * 1985-04-10 1992-06-23 Tecnomen Oy Method and apparatus for synchronizing radio transmitters in a paging network
EP0198448A1 (fr) * 1985-04-19 1986-10-22 Firma Erika Köchler Méthode pour la synchronisation de plusieurs émetteurs-récepteurs cadencés
EP0436875A2 (fr) * 1990-01-10 1991-07-17 Rohde & Schwarz GmbH & Co. KG Système radio à ondes communes
EP0436875A3 (en) * 1990-01-10 1992-05-27 Rohde & Schwarz Gmbh & Co. Kg Common wave radio system
US5218717A (en) * 1990-01-10 1993-06-08 Rohde & Schwarz Gmbh & Co. Kg Simulcast transmission system with improved synchronizing system
EP0570547A1 (fr) * 1991-12-06 1993-11-24 Motorola, Inc. Procede de mesure de retard de canal
EP0570547A4 (en) * 1991-12-06 1993-12-15 Motorola, Inc. Technique for measuring channel delay
FR3020225A1 (fr) * 2014-04-18 2015-10-23 Tdf Dispositif de diffusion radio synchronisee par modulation de frequences

Also Published As

Publication number Publication date
ES530435A0 (es) 1985-03-16
PT78223B (de) 1986-04-23
DE3460839D1 (en) 1986-11-06
ES8503902A1 (es) 1985-03-16
PT78223A (de) 1984-04-01
EP0118710B1 (fr) 1986-10-01

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