GB1287375A - A device for transmission of information at varying frequency - Google Patents

A device for transmission of information at varying frequency

Info

Publication number
GB1287375A
GB1287375A GB6025270A GB6025270A GB1287375A GB 1287375 A GB1287375 A GB 1287375A GB 6025270 A GB6025270 A GB 6025270A GB 6025270 A GB6025270 A GB 6025270A GB 1287375 A GB1287375 A GB 1287375A
Authority
GB
United Kingdom
Prior art keywords
frequency
phase
signal
mixer
output
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
GB6025270A
Other languages
English (en)
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1287375A publication Critical patent/GB1287375A/en
Expired legal-status Critical Current

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)
  • Radio Transmission System (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
GB6025270A 1969-12-23 1970-12-18 A device for transmission of information at varying frequency Expired GB1287375A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1790969A SE338076B (enrdf_load_stackoverflow) 1969-12-23 1969-12-23

Publications (1)

Publication Number Publication Date
GB1287375A true GB1287375A (en) 1972-08-31

Family

ID=20304093

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6025270A Expired GB1287375A (en) 1969-12-23 1970-12-18 A device for transmission of information at varying frequency

Country Status (6)

Country Link
JP (1) JPS4948243B1 (enrdf_load_stackoverflow)
CA (1) CA923561A (enrdf_load_stackoverflow)
DE (1) DE2061744A1 (enrdf_load_stackoverflow)
FR (1) FR2074201A5 (enrdf_load_stackoverflow)
GB (1) GB1287375A (enrdf_load_stackoverflow)
SE (1) SE338076B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398296A (en) 1980-03-08 1983-08-09 Gott Geoffrey F Communication systems
GB2252017A (en) * 1984-08-10 1992-07-22 Siemens Ag A process for safeguarding radio signal transmissions

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2520952A1 (fr) * 1982-02-03 1983-08-05 Trt Telecom Radio Electr Dispositif de controle automatique de gain (cag) a action rapide
GB8915172D0 (en) * 1989-07-01 1989-08-23 Orbitel Mobile Communications Receiver gain control for radio telephone system
WO1992010882A1 (en) * 1990-12-05 1992-06-25 Allied-Signal Inc. Seamless frequency hopping system
US5319801A (en) * 1990-12-05 1994-06-07 Alliedsignal Inc. Seamless frequency hopping system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4398296A (en) 1980-03-08 1983-08-09 Gott Geoffrey F Communication systems
GB2252017A (en) * 1984-08-10 1992-07-22 Siemens Ag A process for safeguarding radio signal transmissions
GB2252017B (en) * 1984-08-10 1992-12-09 Siemens Ag A process for safeguarding radio signal transmissions

Also Published As

Publication number Publication date
DE2061744A1 (de) 1971-07-01
FR2074201A5 (enrdf_load_stackoverflow) 1971-10-01
JPS4948243B1 (enrdf_load_stackoverflow) 1974-12-20
CA923561A (en) 1973-03-27
SE338076B (enrdf_load_stackoverflow) 1971-08-30

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee