EP0835561B1 - Procede et circuit de modulation pour transmettre des signaux de donnees - Google Patents

Procede et circuit de modulation pour transmettre des signaux de donnees Download PDF

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Publication number
EP0835561B1
EP0835561B1 EP96920700A EP96920700A EP0835561B1 EP 0835561 B1 EP0835561 B1 EP 0835561B1 EP 96920700 A EP96920700 A EP 96920700A EP 96920700 A EP96920700 A EP 96920700A EP 0835561 B1 EP0835561 B1 EP 0835561B1
Authority
EP
European Patent Office
Prior art keywords
data signals
signal
rds
transmission
single sideband
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 - Lifetime
Application number
EP96920700A
Other languages
German (de)
English (en)
Other versions
EP0835561A1 (fr
Inventor
Ralph Petersen Andress
Manfred Huberty
Thomas Stampe
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.)
Deutsche Telekom AG
Original Assignee
Deutsche Telekom AG
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
Priority claimed from DE19605381A external-priority patent/DE19605381C2/de
Application filed by Deutsche Telekom AG filed Critical Deutsche Telekom AG
Publication of EP0835561A1 publication Critical patent/EP0835561A1/fr
Application granted granted Critical
Publication of EP0835561B1 publication Critical patent/EP0835561B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to a modulation method and a Circuit arrangement for the transmission of data signals and a receiver to receive the according to the procedure modulated and transmitted data signals.
  • Double sideband modulation basically Double sideband modulation known.
  • Double sideband modulation in the different areas of news channels again, like that Differen ignal of the stereo transmission, the RDS signal for Transmission of program-related additional information in FM radio broadcasting and the color information of the Television broadcast.
  • WO 85/05748 is already one Application of PSK modulations of a subcarrier for the compatible AM broadcast data transmission.
  • the carrier necessary for demodulating a DSB modulation is generated, for example, in stereo transmission in which the pilot frequency of 19 kHz to generate the 38 kHz Carrier in the FM multiplex signal is also transmitted.
  • the RDS demodulator chip called SAA6579T As an example the RDS demodulator chip called SAA6579T.
  • a general problem with the transfer of Radio messages of analog or digital type are provided by represents the required bandwidth of the modulation product means you have to be international or national, the natural resource of what can be used for "news" Optimal use of the frequency band.
  • SSB Single sideband process
  • the invention is therefore based on the object Method and a circuit arrangement for the transmission of Data signals via transmitters with a large coverage range to develop, the disadvantages mentioned largely be avoided.
  • the inventive method, the circuit arrangement according to the invention and the Recipients according to the invention should be quick and inexpensive be feasible, do not require the development of new chips and enable immediate use in end devices.
  • This task is accomplished using a single sideband transmission the RDS modulation (SSB-RDS) by the characteristics of claim 1 or claim 6 for the Circuit arrangement solved.
  • SSB-RDS single sideband transmission the RDS modulation
  • DBS digital double sideband modulation
  • QDSB Quadrature double sideband modulation
  • the filter method For example, by using the filter method either the lower or the upper sideband of the RDS Generate signals.
  • the digital single-sideband modulation obtained in this way can be mixed with a corresponding oscillator frequency into the desired one Transpose the transmission spectrum as can be seen from FIG. 2.
  • the RDS signal on Broadcasting long wave are overcome in that SSB methods known from analog transmission technology be transferred to the RDS QDSB modulation.
  • the difference to analog SSB modulation is Demodulation a frequency and phase correct carrier for To make available.
  • Fig. 1 is the RDS signal with its sidebands shown.
  • the processing of the RDS QDSB signal for the Long wave application is shown in Fig. 2.
  • a supplier of the RDS QDSB signal with carrier can be usually any RDS encoder known from FM RDS use.
  • the filter depends on the selected oscillator frequency of the first frequency conversion the lower (LSB + carrier) or the upper (USB + carrier) sideband available in the ZF location.
  • the second Frequency conversion serves the SSB of the RDS signal obtained with residual carrier (carrier reduced to the maximum of Sideband amplitudes) to the desired transmission frequency transpose.
  • the signal amplified to the corresponding transmission power.
  • Way the SSB signal is generated filter method, Phase method or synthetic generation
  • the application for higher quality modulation types, which are due to a DSB is not to exclude.
  • the use of the procedure is not on tied the long wave range.
  • demodulation is synchronous (more coherent Demodulator with frequency and phase correct subcarrier) as well as asynchronous (without subcarrier) possible.
  • synchronous demodulation it is necessary a residual carrier in quadrature to the sideband to transmit on the transmission side.
  • Demodulation takes place via synchronous demodulators, the transmitted residual carrier is used for synchronous demodulation.
  • Demodulation takes place directly in the baseband. Becomes asynchronous demodulated, it must be ensured on the receiving side that that the non-existing carrier cover of the side band through the demodulator is ensured.
  • the single-sideband transmission of the RDS signal (SSB-RDS) is tested on long wave with the frequency 123.7 kHz, a circuit described below according to FIG. 2 have proven to be technically feasible and advantageous Has.
  • data source 1 is a RDS coder 2 is used, which is a QDSB modulation with or can also provide without carrier frequency.
  • Residual carriers generated using the filter method at 5 and by mixing using a second mixer 6, that of a carrier is fed to a second oscillator 7 the transmission frequency implemented and amplified at 8 and Posted.
  • the residual carrier that can be switched on at the RDS encoder can thus be used ARI carriers can be used.
  • To receive the SSB-RDS signal becomes a well-known all-band receiver with synchronous demodulator used.
  • the further processing of the RDS baseband (Biphase signal) does not cause any technical problems.
  • the Application of the method is not on the long wave range bound.
  • the high-frequency signals are fed from the antenna 13 to an input amplifier 14.
  • the amplified high-frequency signal is then converted into the IF range in a mixer stage 16 and passed through a bandpass filter 17 with a bandwidth of 2.4 kHz.
  • a commercially available RDS demodulator 18 of the type SAA6579T each of which has an output 19, 20 for a clock signal and a data signal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Circuits Of Receivers In General (AREA)
  • Transmitters (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Traffic Control Systems (AREA)

Claims (10)

  1. Procédé de modulation pour la transmission de signaux de données, dans lequel on module par les signaux de données une première porteuse selon le procédé à double bande latérale en quadrature, on déduit du signal modulé un signal à bande latérale unique avec porteuse résiduelle à l'aide d'une méthode des filtres ou des phases et on convertit le signal à bande latérale unique dans le domaine des grandes ondes par un mélange avec une fréquence d'oscillateur et on émet le signal à bande latérale unique converti, y compris la porteuse résiduelle convertie.
  2. Procédé de modulation pour la transmission de signaux de données, dans lequel on produit par une génération par synthèse un signal à bande latérale unique avec porteuse résiduelle qui est modulé en double bande latérale par les signaux de données et on convertit le signal à bande latérale unique dans le domaine des grandes ondes par un mélange avec une fréquence d'oscillateur et on émet le signal à bande latérale unique converti, y compris la porteuse résiduelle convertie.
  3. Procédé de modulation selon la revendication 1, caractérisé par le fait qu'on obtient le signal modulé à l'aide d'un codeur de système de radiocommunication de données RDS.
  4. Procédé de modulation selon l'une des revendications 1 ou 3, caractérisé par le fait qu'on produit par filtrage le signal à bande latérale unique au choix comme bande latérale inférieure ou supérieure du signal modulé.
  5. Circuit pour la transmission de signaux de données, dans lequel les signaux de données peuvent être envoyés à un codeur RDS (2), la sortie du codeur RDS (2) est reliée à un modulateur par déplacement de fréquence (3, 4) qui pour sa part est raccordé en sortie à un filtre à bande latérale unique (5) dont la sortie est reliée à un autre modulateur par déplacement de fréquence (6, 7) pour la conversion dans le domaine des grandes ondes et dans lequel la sortie de l'autre modulateur par déplacement de fréquence (6, 7) est raccordée à l'entrée d'un émetteur de grandes ondes (8).
  6. Récepteur pour la réception de signaux de données, dans lequel les signaux de données sont émis comme modulation d'un signal à bande latérale unique avec porteuse résiduelle qui est converti pour la transmission, par un mélange avec une fréquence d'oscillateur, dans le domaine des grandes ondes, qui est émis et qui est reçu, et dans lequel il est prévu des moyens (15, 16) de conversion du signal reçu dans le domaine des grandes ondes dans la position de fréquence du signal à bande latérale unique avec porteuse résiduelle et à la sortie desquels un filtre passe-bande (17) est raccordé, le filtre passe-bande étant relié à un démodulateur (18).
  7. Récepteur selon la revendication 6, caractérisé par le fait que le filtre passe-bande a une largeur de bande (17) de 2,4 kHz et inclut la fréquence de 57 kHz.
  8. Récepteur selon l'une des revendications 6 ou 7, caractérisé par le fait que le démodulateur (18) est un démodulateur RDS connu en soi.
  9. Récepteur pour la réception de signaux de données, dans lequel les signaux de données sont émis comme modulation d'un signal à bande latérale unique avec porteuse résiduelle qui est converti pour la transmission, par un mélange avec une fréquence d'oscillateur, dans le domaine des grandes ondes, qui est émis et qui est reçu, et dans lequel la porteuse résiduelle transmise est utilisée pour la démodulation synchrone.
  10. Récepteur pour la réception de signaux de données, dans lequel les signaux de données sont émis comme modulation d'un signal à bande latérale unique avec porteuse résiduelle qui est converti pour la transmission, par un mélange avec une fréquence d'oscillateur, dans le domaine des grandes ondes, qui est émis et qui est reçu, et dans lequel la bande latérale reçue est démodulée de façon asynchrone, notamment par l'analyse des composantes fréquentielles spectrales du produit de modulation.
EP96920700A 1995-06-28 1996-06-26 Procede et circuit de modulation pour transmettre des signaux de donnees Expired - Lifetime EP0835561B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19523414 1995-06-28
DE19523414 1995-06-28
DE19605381A DE19605381C2 (de) 1995-06-28 1996-02-14 Modulationsverfahren und -Schaltungsanordnung zur Übertragung von Datensignalen
DE19605381 1996-02-14
PCT/DE1996/001124 WO1997001894A1 (fr) 1995-06-28 1996-06-26 Procede et circuit de modulation pour transmettre des signaux de donnees

Publications (2)

Publication Number Publication Date
EP0835561A1 EP0835561A1 (fr) 1998-04-15
EP0835561B1 true EP0835561B1 (fr) 2000-03-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP96920700A Expired - Lifetime EP0835561B1 (fr) 1995-06-28 1996-06-26 Procede et circuit de modulation pour transmettre des signaux de donnees

Country Status (11)

Country Link
EP (1) EP0835561B1 (fr)
AT (1) ATE190786T1 (fr)
BG (1) BG62545B1 (fr)
CZ (1) CZ288335B6 (fr)
EE (1) EE03365B1 (fr)
HU (1) HU220526B1 (fr)
PL (1) PL181135B1 (fr)
RO (1) RO119400B1 (fr)
RU (1) RU2194368C2 (fr)
SK (1) SK174797A3 (fr)
WO (1) WO1997001894A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10003480B2 (en) 2014-05-29 2018-06-19 Qualcomm Incorporated Asynchronous multicarrier communications
PL414829A1 (pl) 2015-11-17 2017-05-22 Audiolink Technologies Spółka Z Ograniczoną Odpowiedzialnością Sposób równoległego budowania przekazu informacji różnymi kanałami i układ do równoległego przesyłania informacji różnymi kanałami

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2948518A1 (de) * 1979-12-01 1981-06-04 Blaupunkt Werke Gmbh Verfahren zum uebertragen von zusaetzlichen informationen
WO1985004541A1 (fr) * 1984-03-28 1985-10-10 American Telephone & Telegraph Company Systeme de communication a bande laterale simple
US4688255A (en) * 1984-05-29 1987-08-18 Kahn Leonard R Compatible AM broadcast/data transmisison system
DE3821014A1 (de) * 1988-06-22 1989-12-28 Licentia Gmbh Verfahren zur digitalen phasenmodulation eines traegers durch datensignale und digitaler phasenmodulator zum ausfuehren des verfahrens

Also Published As

Publication number Publication date
PL181135B1 (pl) 2001-05-31
EE03365B1 (et) 2001-02-15
HUP9802364A2 (hu) 1999-02-01
CZ351697A3 (cs) 1998-04-15
HUP9802364A3 (en) 2000-05-29
HU220526B1 (hu) 2002-03-28
BG62545B1 (bg) 2000-01-31
RO119400B1 (ro) 2004-08-30
ATE190786T1 (de) 2000-04-15
BG102091A (en) 1998-07-31
RU2194368C2 (ru) 2002-12-10
SK174797A3 (en) 1998-11-04
PL324262A1 (en) 1998-05-11
EP0835561A1 (fr) 1998-04-15
CZ288335B6 (en) 2001-05-16
WO1997001894A1 (fr) 1997-01-16

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