EP0118710B1 - 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 PDFInfo
- Publication number
- EP0118710B1 EP0118710B1 EP84100933A EP84100933A EP0118710B1 EP 0118710 B1 EP0118710 B1 EP 0118710B1 EP 84100933 A EP84100933 A EP 84100933A EP 84100933 A EP84100933 A EP 84100933A EP 0118710 B1 EP0118710 B1 EP 0118710B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signal
- intelligence
- synchronising
- modulation
- synchronising signal
- 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
Links
Images
Classifications
-
- 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 for time comparison is not used, which must also be stored in the individual transmitter stations and a separate synchronization signal must be obtained from an external transmitter to start it. but that only a single signal. referred to here 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 synchronization signal is transmitted once wirelessly and once via the associated modulation feeder to each of the transmitting stations. There is a wireless synchronous signal receiver.
- 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 transmitting 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 except for 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 In order to avoid ambiguities when comparing the transit time to the longest of the transit times occurring in the single-frequency radio system between the control center and a useful signal transmitter, 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 transmission of the synchronous signals on the operating frequency for the useful signals of the useful signal transmitters takes place at a fixed time interval before each useful signal is transmitted.
- the same-wave radio system is supplied with useful signals 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 synchronization signals from the modulation feeder M1 are supplied on the one hand 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 center Z sends a synchronization signal A (see also FIG. 2) both to the modulation feeder M1 (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 for wireless transmission to the individual synchronous receivers Es.
- the wirelessly transmitted synchronization signal arrives at the runtime comparator K essentially after the time T1 if the remaining runtimes of the wireless transmission path are neglected.
- the synchronization signal transmitted via the modulation feeder M1 reaches the runtime comparator after the runtime T2.
- a control signal fed to the delay device V3 on the basis of this comparison has the effect that the synchronizing signal is delayed by the time T3 (cf. D in FIG. 2).
- T3 T1 - 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 as the useful signal transmitter Sn 1 in the individual transmitting stations.
- the same receiver can be used as the synchronous signal receiver Es 1 in the transmitting stations as is provided on the receiving side of the useful signals as, for example, a mobile useful signal receiver En. 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 synchronous signal receivers will also be inexpensive to set up.
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Mobile Radio Communication Systems (AREA)
- Circuits Of Receivers In General (AREA)
Claims (2)
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 EP0118710A1 (fr) | 1984-09-19 |
EP0118710B1 true 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) | ES530435A0 (fr) |
PT (1) | PT78223B (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4000538C1 (fr) * | 1990-01-10 | 1991-03-21 | Rohde & Schwarz Gmbh & Co Kg, 8000 Muenchen, De |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI71452C (fi) * | 1985-04-10 | 1986-12-19 | Arvo Mustonen | Synkroniseringsfoerfarande foer ett lokalt t ex riksomfattandepersonsoekarnaets radiosaendare |
CH663126A5 (de) * | 1985-04-19 | 1987-11-13 | Koechler Erika Fa | Verfahren zur synchronisation mehrerer taktgesteuerter sender-empfaenger. |
US5280629A (en) * | 1991-12-06 | 1994-01-18 | Motorola, Inc. | Technique for measuring channel delay |
FR3020225B1 (fr) * | 2014-04-18 | 2016-04-01 | Tdf | Dispositif de diffusion radio synchronisee par modulation de frequences |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3020176A1 (de) * | 1980-05-28 | 1981-12-03 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Verfahren und anordnung zum zeitgleichen aussenden von nachrichten ueber mehrere gleichwellensender |
DE3022425A1 (de) * | 1980-06-14 | 1981-12-24 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Verfahren und anordnung zum zeitgleichen aussenden von nachrichten ueber mehrere gleichwellensender |
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 |
DE3133120A1 (de) * | 1981-08-21 | 1983-03-03 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Verfahren zum automatischen ermitteln eines laufzeitausgleichs in einem gleichwellenfunknetz |
-
1984
- 1984-01-31 EP EP84100933A patent/EP0118710B1/fr not_active Expired
- 1984-01-31 DE DE8484100933T patent/DE3460839D1/de not_active Expired
- 1984-03-09 ES ES530435A patent/ES530435A0/es active Granted
- 1984-03-09 PT PT78223A patent/PT78223B/pt not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4000538C1 (fr) * | 1990-01-10 | 1991-03-21 | Rohde & Schwarz Gmbh & Co Kg, 8000 Muenchen, De |
Also Published As
Publication number | Publication date |
---|---|
DE3460839D1 (en) | 1986-11-06 |
ES8503902A1 (es) | 1985-03-16 |
ES530435A0 (es) | 1985-03-16 |
PT78223B (de) | 1986-04-23 |
EP0118710A1 (fr) | 1984-09-19 |
PT78223A (de) | 1984-04-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69331701T2 (de) | Anordnung in einem mobilen telekommunikationssystem zur synchronisation der sender der basisstationen | |
DE3650433T2 (de) | Verfahren zur Synchronisierung von Funksendern in einem lokalen, z.B. nationalen Funknetz. | |
DE69733592T2 (de) | Verfahren und Gerät zur Kommunikationssynchronisation in einer Satellitenkommunikationsanordnung | |
EP0046938B1 (fr) | Circuit pour synchroniser un poste émetteur- récepteur sur le réseau de données d'un système numérique d'information | |
EP0040731B1 (fr) | Méthode et dispositif pour la transmission simultanée d'informations par plusieurs émetteurs à ondes communes | |
DE2050718B2 (de) | Verfahren zur Kommunikation über einen Erdsatelliten mittels Zeitmultiplex und Vorrichtung zur Durchführung des Verfahrens | |
DE3133120C2 (fr) | ||
DE69424844T2 (de) | Verfahren und Vorrichtung zur Synchronisierung der Sendefrequenz zweier Basisstationen | |
EP0020893B1 (fr) | Réseau radio | |
DE69221938T2 (de) | Funkübertragungsanordnung mit Messung und Regelung der Übertragungsverzögerung | |
EP0198448A1 (fr) | Méthode pour la synchronisation de plusieurs émetteurs-récepteurs cadencés | |
EP0118710B1 (fr) | Dispositif de synchronisation pour les signaux utiles d'un système de radiodiffusion sur fréquence commune | |
EP0042144B1 (fr) | Méthode et dispositif pour la transmission simultanée d'informations par plusieurs émetteurs à ondes communes | |
DE69209669T2 (de) | Abfrageverfahren in einem drahtlosen Paketdatenübermittlungssystem | |
DE1591341C2 (de) | Verfahren zur Bitsynchronisierung einer Bodenstation in einem ZeitmultiplexÜbertragungssystem mit mehreren Bodenstationen und einem Satelliten als Relaisstation | |
EP0315028B1 (fr) | Procédé de synchronisation d'émetteurs, dispositif de contrôle et émetteurs réalisant le procédé ainsi que l'application du procédé | |
EP0326630B1 (fr) | Procédé de transmission de signaux de télécommande sur une seule fréquence porteuse entre émetteurs et récepteurs autonomes fonctionnant en multiplexage par répartition dans le temps et dispositif pour la mise en oeuvre du procédé | |
DE3324693A1 (de) | Verfahren zur zweiweg-hochfrequenz-laufzeitmessung | |
DE10359649A1 (de) | Übertragungseinrichtung vom regenerativen Relais-Typ und Kommunikationssystem mit dieser | |
EP0738056B1 (fr) | Méthode et dispositif de transmission de données sans fil sur canaux de transmission ayant des perturbations périodiques | |
DE3224183A1 (de) | Schaltungsanordnung zur durchfuehrung einer selektiven nachrichtenuebermittlung | |
EP0899897B1 (fr) | Procédé d'ajustement de la fréquence porteuse d'une station d'abonné dans un système de transmission point-multipoints | |
DE60031324T2 (de) | Gerät und Verfahren zur augenblicklicher Erfassung in einer Netzanordnung | |
EP0086865A2 (fr) | Procédé de transmission radio d'informations digitales à l'aide d'une fréquence de transmission | |
EP0510504A2 (fr) | Utilisation d'un procédé "ping-pong" pour la transmission optique |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Designated state(s): CH DE FR GB IT LI NL |
|
17P | Request for examination filed |
Effective date: 19841005 |
|
ITF | It: translation for a ep patent filed |
Owner name: BARZANO' E ZANARDO MILANO S.P.A. |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): CH DE FR GB IT LI NL |
|
REF | Corresponds to: |
Ref document number: 3460839 Country of ref document: DE Date of ref document: 19861106 |
|
ET | Fr: translation filed | ||
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
ITTA | It: last paid annual fee | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19911213 Year of fee payment: 9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19920113 Year of fee payment: 9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 19920131 Year of fee payment: 9 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 19920219 Year of fee payment: 9 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Effective date: 19930131 Ref country code: GB Effective date: 19930131 Ref country code: CH Effective date: 19930131 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Effective date: 19930801 |
|
NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee | ||
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 19930131 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Effective date: 19930930 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19940517 Year of fee payment: 11 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Effective date: 19951003 |