EP0184811A2 - Procédé pour la transmission analogique de la parole par radio - Google Patents

Procédé pour la transmission analogique de la parole par radio Download PDF

Info

Publication number
EP0184811A2
EP0184811A2 EP85115658A EP85115658A EP0184811A2 EP 0184811 A2 EP0184811 A2 EP 0184811A2 EP 85115658 A EP85115658 A EP 85115658A EP 85115658 A EP85115658 A EP 85115658A EP 0184811 A2 EP0184811 A2 EP 0184811A2
Authority
EP
European Patent Office
Prior art keywords
sound
transmission
sound pulses
speech
pulses
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
EP85115658A
Other languages
German (de)
English (en)
Other versions
EP0184811B1 (fr
EP0184811A3 (en
Inventor
Bodo Dipl.-Math. Rittenauer
Werner Dipl.-Ing. Kober
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.)
Siemens AG
Original Assignee
Siemens 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
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT85115658T priority Critical patent/ATE61503T1/de
Publication of EP0184811A2 publication Critical patent/EP0184811A2/fr
Publication of EP0184811A3 publication Critical patent/EP0184811A3/de
Application granted granted Critical
Publication of EP0184811B1 publication Critical patent/EP0184811B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication

Definitions

  • the invention relates to a method for analog voice transmission via radio using transceiver stations for tactical use, in particular mobile transceiver stations.
  • transceiver stations are equipped with an encryption device for security against eavesdropping and can be switched to a frequency hopping mode to increase the interference resistance of a connection.
  • Both the use of encryption and the use of one Frequency hopping procedures on their own or together provide sufficient security against the intrusion of a potential opponent into an existing radio connection.
  • both methods reduce the availability of an existing connection.
  • a larger number of channels which can be used per se for the transmission of a voice signal must be provided for the transmission of the voice signal in order to have a sufficiently wide band available for the hopping of the radio carrier frequency.
  • the frequency hopping method in addition, it is added that not all of the pseudo-randomly controlled frequency channels enable signal transmission, for example because they are disturbed. This sometimes significantly reduces the quality of the transmission.
  • the invention has for its object to provide a simple solution for the transmission of voice signals between transceiver stations in tactical use, which makes it possible to specify a simple solution even when transmitting an unencrypted voice signal in analog form, which is possible with this type of transmission unnoticed intrusion of a potential opponent in a radio connection is prevented with certainty.
  • FIG. 1 shows on the left side the transmission side SS and on the right side the reception side ES of two transceiver stations which use the method according to the invention to identify the intrusion of a potential opponent into the connection.
  • the block diagram of the transmission side SS shows a microphone M for voice inputs, the output of which is connected to the modulation input of the transmitter S via the changeover switch U.
  • the analog voice signal is suitably modulated onto a radio frequency carrier and rotated via the antenna A to the reception side ES.
  • the changeover switch U the first switch contact of which represents the microphone output, is connected via its second switch contact to the tone generator G, which generates a tone-frequency oscillation, for example at 1.6 kHz.
  • the switch U is controlled by a pseudo-random generator PNG, the setting and the clock of which is derived from the station clock UHR.
  • the pseudo-random generator PNG controls the changeover switch U in such a way that, in pseudo-randomly changing periods of time, the output of the tone generator G is briefly connected to the modulation input of the transmitter in the order of magnitude ⁇ 20 msec.
  • the analog voice signal is then interspersed at irregular time intervals with sound pulses whose occurrence in time when the transmitting side SS is synchronized with the receiving side ES in advance is known on the reception side ES.
  • the resulting speech signal gaps represent practically no loss of quality for the speech signal.
  • the receiving side ES has an antenna A, via which the receiver E receives the radio-frequency carrier modulated with the speech signal and represents the speech signal in the baseband level.
  • the analog voice signal interspersed with the sound pulses is switched via the closed switch s1 of a voice output, e.g. supplied in the form of a handset H.
  • a sound demodulator TD is connected to the output of the receiver E via the bandpass filter BP and is always connected on the output side to an evaluation device AW via a further switch 2 when a window for the insertion of a sound pulse is to be expected in the incoming analog voice signal.
  • the switch s2 is controlled on the transmission side by an identical pseudo random generator PNG, which is set via the station clock UHR and receives the corresponding clock from this station clock.
  • the evaluation device AW is designed in such a way that it activates an alarm device AG on the output side if the expected successive sound pulses are repeatedly absent and at the same time interrupts the connection between the output of the receiver E and the receiver H via the switch s1. This ensures that if a potential opponent enters, this is recognized by the incorrect reception of the sound impulses and the connection is interrupted.
  • transceivers for tactical use are usually included a key device and a possibility for the application of a frequency hopping method equipped with a corresponding device for which a pseudo random generator is also required.
  • This pseudo random generator can thus be used in an extremely advantageous manner for carrying out the method according to the invention.
  • the time diagram in FIG. 2 shows a signal flow sequence over time t as it is present at the modulation input of transmitter S on transmission side SS and at the output of receiver E on reception side ES.
  • the analog voice signal ASS is interrupted here in pseudorandomly different time intervals by a window F in which a sound pulse TE is transmitted.
  • the width of the windows representing an interruption of the analog voice signal ASS is so small that the speech quality at the output of the receiver H on the receiving side ES is practically not impaired.
  • the invention represents an additional measure within a bundle of measures for interference resistance for transceiver stations in tactical use and is therefore particularly suitable for use in mobile radio stations for land, water and aircraft.

Landscapes

  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Engineering & Computer Science (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Transmitters (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Transceivers (AREA)
  • Radio Transmission System (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Toys (AREA)
  • Developing Agents For Electrophotography (AREA)
EP85115658A 1984-12-12 1985-12-09 Procédé pour la transmission analogique de la parole par radio Expired - Lifetime EP0184811B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85115658T ATE61503T1 (de) 1984-12-12 1985-12-09 Verfahren zur analogen sprachuebertragung ueber funk.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3445312 1984-12-12
DE3445312 1984-12-12

Publications (3)

Publication Number Publication Date
EP0184811A2 true EP0184811A2 (fr) 1986-06-18
EP0184811A3 EP0184811A3 (en) 1988-01-13
EP0184811B1 EP0184811B1 (fr) 1991-03-06

Family

ID=6252587

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85115658A Expired - Lifetime EP0184811B1 (fr) 1984-12-12 1985-12-09 Procédé pour la transmission analogique de la parole par radio

Country Status (8)

Country Link
EP (1) EP0184811B1 (fr)
AT (1) ATE61503T1 (fr)
DE (1) DE3582023D1 (fr)
ES (1) ES8701442A1 (fr)
FI (1) FI79216C (fr)
IN (1) IN163475B (fr)
NO (1) NO166308C (fr)
PT (1) PT81651B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2807241A1 (fr) * 2000-03-31 2001-10-05 Siemens Ag Procede pour securiser la transmission de signaux sans contact ente un emetteur et un recepteur, et dispositif de transmission des signaux

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE521991C (de) * 1928-08-17 1931-03-28 Telefunken Gmbh Verfahren zur geheimen UEbermittlung í¬ insbesondere von Telephoniestroemen í¬ mittels modulierter Hochfrequenz
FR2233768A1 (fr) * 1973-06-12 1975-01-10 Patelhold Patentverwertung
DE2952158A1 (de) * 1979-12-22 1981-06-25 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Funk-nachrichtenuebertragungsverfahren mit begrenzten, insbesondere sehr kurzen sendezeiten und empfaenger hierfuer
EP0037071A2 (fr) * 1980-03-31 1981-10-07 Siemens Aktiengesellschaft Méthode pour la surveillance de liaisons radio mobile analogues numériques
EP0106400A1 (fr) * 1982-10-08 1984-04-25 Philips Electronics Uk Limited Identification d'un système dans un système de communications
EP0108151A1 (fr) * 1982-05-17 1984-05-16 Sony Corporation Cryptophone

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE521991C (de) * 1928-08-17 1931-03-28 Telefunken Gmbh Verfahren zur geheimen UEbermittlung í¬ insbesondere von Telephoniestroemen í¬ mittels modulierter Hochfrequenz
FR2233768A1 (fr) * 1973-06-12 1975-01-10 Patelhold Patentverwertung
DE2952158A1 (de) * 1979-12-22 1981-06-25 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Funk-nachrichtenuebertragungsverfahren mit begrenzten, insbesondere sehr kurzen sendezeiten und empfaenger hierfuer
EP0037071A2 (fr) * 1980-03-31 1981-10-07 Siemens Aktiengesellschaft Méthode pour la surveillance de liaisons radio mobile analogues numériques
EP0108151A1 (fr) * 1982-05-17 1984-05-16 Sony Corporation Cryptophone
EP0106400A1 (fr) * 1982-10-08 1984-04-25 Philips Electronics Uk Limited Identification d'un système dans un système de communications

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2807241A1 (fr) * 2000-03-31 2001-10-05 Siemens Ag Procede pour securiser la transmission de signaux sans contact ente un emetteur et un recepteur, et dispositif de transmission des signaux

Also Published As

Publication number Publication date
ATE61503T1 (de) 1991-03-15
PT81651A (pt) 1986-06-11
NO166308C (no) 1991-06-26
FI854900A (fi) 1986-06-13
NO855007L (no) 1986-06-13
ES8701442A1 (es) 1986-11-16
FI854900A0 (fi) 1985-12-11
FI79216B (fi) 1989-07-31
EP0184811B1 (fr) 1991-03-06
IN163475B (fr) 1988-10-01
EP0184811A3 (en) 1988-01-13
FI79216C (fi) 1989-11-10
ES549878A0 (es) 1986-11-16
DE3582023D1 (de) 1991-04-11
PT81651B (pt) 1994-07-29
NO166308B (no) 1991-03-18

Similar Documents

Publication Publication Date Title
DE2648273C2 (de) Einseitenband-Verfahren zur Informationsübertragung und Vorrichtung zur Durchführung des Verfahrens
EP0188836B1 (fr) Méthode et dispositif pour la transmission d'informations dans un système numérique de radio-transmission
DE1803539B2 (de) 30.0^.6S " 37420 08.08.68 " 56894 Fernsehtelephonieeinrichtung
DE1441754B2 (de) Verfahren zum selektiven uebertragen von nachrichten in einem breitbandkanal
DE2803396A1 (de) Uebertragungssystem
DE3688530T2 (de) Geraet zur vermeidung des abhoerens eines funksignals, welches zwischen einer festen einrichtung und einer mobilstation uebertragen wird.
EP0075888B1 (fr) Procédé de transmission de signaux de parole à bande de fréquence comprimée et avec protection contre les écoutes illicites
DE3539818A1 (de) Verfahren zum digitalen uebertragen von daten und sprache
EP0184811B1 (fr) Procédé pour la transmission analogique de la parole par radio
DE2056769C3 (de) Sende-Empfangsstation in einem Radio-Telef onienetz mit selektivem Anruf
DE3514462C2 (fr)
DE2408190B2 (de) Verfahren und Schaltungsanordnung zur Nachrichtenübertragung zwischen einer Basisstation und wenigstens einer Außenstation
DE2111706B2 (de) Schaltungsanordnung für eine Fernsprech-Vermittlungsanlage mit Pulsphasenmodulation
DE3730399A1 (de) Verfahren und vorrichtung zur uebertragung eines digitalsignals
DE2320551A1 (de) Daten-kommunikationssystem
DE3536384C2 (fr)
DE1087189B (de) Mehrkanal-Nachrichtenuebertragungs-anlage mit Impulsphasenmodulation
DE2850414A1 (de) Funkuebertragungssystem
DE3236194A1 (de) Schnurloser fernsprechapparat
EP0151281A1 (fr) Système cellulaire numérique en multiplexage de temps
DE3605350C2 (de) Verfahren zur Tarnung einer durch Funk übertragenen Nachricht
DE3432648C1 (de) Verfahren zur störresistenten Funksignalübertragung
DE3611100C2 (de) Verfahren zum Vermeiden des unberechtigten Mithörens bei schnurlosen Telefonen
EP0307545A2 (fr) Procédé de radio-transmission numérique pour téléphone sans fil
DE19747454C1 (de) Verfahren und Empfangseinrichtung zur Datenübertragung in einem Kommunikationssystem

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

Kind code of ref document: A2

Designated state(s): AT BE CH DE FR GB LI SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

RHK1 Main classification (correction)

Ipc: H04K 1/00

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE FR GB LI SE

17P Request for examination filed

Effective date: 19880711

17Q First examination report despatched

Effective date: 19900523

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB LI SE

REF Corresponds to:

Ref document number: 61503

Country of ref document: AT

Date of ref document: 19910315

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3582023

Country of ref document: DE

Date of ref document: 19910411

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
EN Fr: translation not filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19910726

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

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19920225

Year of fee payment: 7

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19920324

Year of fee payment: 7

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: GB

Payment date: 19921119

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19921125

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19921216

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19921218

Year of fee payment: 8

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19921231

Ref country code: CH

Effective date: 19921231

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19930901

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19931209

Ref country code: AT

Effective date: 19931209

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19931210

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19931231

BERE Be: lapsed

Owner name: SIEMENS A.G.

Effective date: 19931231

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19931209

EUG Se: european patent has lapsed

Ref document number: 85115658.8

Effective date: 19940710