ES8302387A1 - Procedimiento para la permuta de bandas parciales, de igual anchura, de una banda de frecuencia de senales, mediante moduladores. - Google Patents

Procedimiento para la permuta de bandas parciales, de igual anchura, de una banda de frecuencia de senales, mediante moduladores.

Info

Publication number
ES8302387A1
ES8302387A1 ES509565A ES509565A ES8302387A1 ES 8302387 A1 ES8302387 A1 ES 8302387A1 ES 509565 A ES509565 A ES 509565A ES 509565 A ES509565 A ES 509565A ES 8302387 A1 ES8302387 A1 ES 8302387A1
Authority
ES
Spain
Prior art keywords
modulators
nnu
epsilon
partial bands
fnu
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
Application number
ES509565A
Other languages
English (en)
Other versions
ES509565A0 (es
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of ES8302387A1 publication Critical patent/ES8302387A1/es
Publication of ES509565A0 publication Critical patent/ES509565A0/es
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/04—Secret communication by frequency scrambling, i.e. by transposing or inverting parts of the frequency band or by inverting the whole band

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

PROCEDIMIENTO PARA LA PERMUTA DE BANDAS PARCIALES, DE IGUAL ANCHURA, DE UNA BANDA DE FRECUENCIA DE SEÑALES, MEDIANTE MODULADORES. CARACTERIZADO PORQUE ESTAN COORDINADOS FIJAMENTE A LOS MODULADORES DETERMINADAS FRECUENCIAS PORTADORAS; PORQUE ENTRE LOS FILTROS DE PASO DE BANDA Y LOS MODULADORES CONECTADOS DETRAS, ESTA PREVISTA UNA MATRIZ DE ACOPLAMIENTO PARA EL ENTREMEZCLADO DE LAS BANDAS PARCIALES; PORQUE LA MATRIZ DE ACOPLAMIENTO ES REGULABLE POR UN GENERADOR DE CAUSALIDAD; PORQUE LA BANDA DE PASO PERMEABLE DEL FILTRO DE PASO DE BANDA ES IGUAL A UNA DE LAS BANDAS PARCIALES; Y PORQUE UNA DE LAS FRECUENCIAS PORTADORAS SE ELIGE COMO CERO.
ES509565A 1981-02-13 1982-02-12 Procedimiento para la permuta de bandas parciales, de igual anchura, de una banda de frecuencia de senales, mediante moduladores. Granted ES509565A0 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813105214 DE3105214A1 (de) 1981-02-13 1981-02-13 "teilbandvertauschungsverfahren"

Publications (2)

Publication Number Publication Date
ES8302387A1 true ES8302387A1 (es) 1982-12-16
ES509565A0 ES509565A0 (es) 1982-12-16

Family

ID=6124771

Family Applications (1)

Application Number Title Priority Date Filing Date
ES509565A Granted ES509565A0 (es) 1981-02-13 1982-02-12 Procedimiento para la permuta de bandas parciales, de igual anchura, de una banda de frecuencia de senales, mediante moduladores.

Country Status (7)

Country Link
EP (1) EP0058318B1 (es)
CA (1) CA1186380A (es)
DE (2) DE3105214A1 (es)
DK (1) DK52682A (es)
ES (1) ES509565A0 (es)
FI (1) FI820393L (es)
PT (1) PT74410B (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6424648A (en) * 1987-07-21 1989-01-26 Fujitsu Ltd Privacy call equipment

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2408692A (en) * 1942-04-29 1946-10-01 Rca Corp Signaling system
CH248975A (de) * 1946-02-04 1947-05-31 Patelhold Patentverwertung Verfahren und Einrichtung zur Verschleierung der einzelnen Gespräche einer Mehrkanalanlage.
DE1273002B (de) * 1963-09-11 1968-07-18 Siemens Ag Einrichtung zur verschluesselten UEbertragung von Sprachsignalen durch Vertauschung von Teilbaendern
DE2652607A1 (de) * 1976-11-19 1978-05-24 Licentia Gmbh Verfahren zum verschleierten uebertragen von nachrichtensignalen

Also Published As

Publication number Publication date
DK52682A (da) 1982-08-14
PT74410A (de) 1982-03-01
PT74410B (de) 1983-10-28
DE3105214A1 (de) 1982-09-09
EP0058318B1 (de) 1984-08-08
DE3260506D1 (en) 1984-09-13
CA1186380A (en) 1985-04-30
EP0058318A1 (de) 1982-08-25
FI820393L (fi) 1982-08-14
ES509565A0 (es) 1982-12-16

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