NL7400715A - Single sideband coding privacy equipment - carrier and constitution frequencies are changed in programmed fashion - Google Patents

Single sideband coding privacy equipment - carrier and constitution frequencies are changed in programmed fashion

Info

Publication number
NL7400715A
NL7400715A NL7400715A NL7400715A NL7400715A NL 7400715 A NL7400715 A NL 7400715A NL 7400715 A NL7400715 A NL 7400715A NL 7400715 A NL7400715 A NL 7400715A NL 7400715 A NL7400715 A NL 7400715A
Authority
NL
Netherlands
Prior art keywords
carrier
frequencies
single sideband
changed
constitution
Prior art date
Application number
NL7400715A
Other languages
Dutch (nl)
Original Assignee
Conte Bureau Voor Ontwikkeling
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 Conte Bureau Voor Ontwikkeling filed Critical Conte Bureau Voor Ontwikkeling
Priority to NL7400715A priority Critical patent/NL7400715A/en
Publication of NL7400715A publication Critical patent/NL7400715A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/003—Secret communication by varying carrier frequency at or within predetermined or random intervals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transmitters (AREA)

Abstract

A privary coding system for the transmission of signals using carrier wave modulation and decoding at the receiver by means of a signal at the original carrier frequency. To ensure privacy use is made of more than one carrier frequency, the frequency of the carrier used at the transmitter and the reconstitution signal at the receiver being changed simultaneously. The transmitter and receiver may each be provided with sets of frequency dividers driven from a pair of HF oscillators on identical frequencies and the coding programme may connect different frequency dividers at different times. Particularly applicable to single sideband communication with mobile station.
NL7400715A 1974-01-18 1974-01-18 Single sideband coding privacy equipment - carrier and constitution frequencies are changed in programmed fashion NL7400715A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL7400715A NL7400715A (en) 1974-01-18 1974-01-18 Single sideband coding privacy equipment - carrier and constitution frequencies are changed in programmed fashion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7400715A NL7400715A (en) 1974-01-18 1974-01-18 Single sideband coding privacy equipment - carrier and constitution frequencies are changed in programmed fashion

Publications (1)

Publication Number Publication Date
NL7400715A true NL7400715A (en) 1975-07-22

Family

ID=19820579

Family Applications (1)

Application Number Title Priority Date Filing Date
NL7400715A NL7400715A (en) 1974-01-18 1974-01-18 Single sideband coding privacy equipment - carrier and constitution frequencies are changed in programmed fashion

Country Status (1)

Country Link
NL (1) NL7400715A (en)

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