FR2347690B1 - - Google Patents

Info

Publication number
FR2347690B1
FR2347690B1 FR7710529A FR7710529A FR2347690B1 FR 2347690 B1 FR2347690 B1 FR 2347690B1 FR 7710529 A FR7710529 A FR 7710529A FR 7710529 A FR7710529 A FR 7710529A FR 2347690 B1 FR2347690 B1 FR 2347690B1
Authority
FR
France
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
FR7710529A
Other versions
FR2347690A1 (fr
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.)
Plessey Handel und Investments AG
Original Assignee
Plessey Handel und Investments 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 Plessey Handel und Investments AG filed Critical Plessey Handel und Investments AG
Publication of FR2347690A1 publication Critical patent/FR2347690A1/fr
Application granted granted Critical
Publication of FR2347690B1 publication Critical patent/FR2347690B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/08—Systems for determining direction or position line
    • G01S1/38—Systems for determining direction or position line using comparison of [1] the phase of the envelope of the change of frequency, due to Doppler effect, of the signal transmitted by an antenna moving, or appearing to move, in a cyclic path with [2] the phase of a reference signal, the frequency of this reference signal being synchronised with that of the cyclic movement, or apparent cyclic movement, of the antenna
    • G01S1/40—Systems for determining direction or position line using comparison of [1] the phase of the envelope of the change of frequency, due to Doppler effect, of the signal transmitted by an antenna moving, or appearing to move, in a cyclic path with [2] the phase of a reference signal, the frequency of this reference signal being synchronised with that of the cyclic movement, or apparent cyclic movement, of the antenna the apparent movement of the antenna being produced by cyclic sequential energisation of fixed antennas
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/16—Spectrum analysis; Fourier analysis

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Radar Systems Or Details Thereof (AREA)
FR7710529A 1976-04-08 1977-04-07 Procede et appareil d'analyse spectrale pour systeme d'atterrissage Granted FR2347690A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB14268/76A GB1579329A (en) 1976-04-08 1976-04-08 Identification frequency

Publications (2)

Publication Number Publication Date
FR2347690A1 FR2347690A1 (fr) 1977-11-04
FR2347690B1 true FR2347690B1 (fr) 1980-05-09

Family

ID=10038083

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7710529A Granted FR2347690A1 (fr) 1976-04-08 1977-04-07 Procede et appareil d'analyse spectrale pour systeme d'atterrissage

Country Status (4)

Country Link
US (1) US4131890A (fr)
DE (1) DE2715819A1 (fr)
FR (1) FR2347690A1 (fr)
GB (1) GB1579329A (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2629598A1 (fr) * 1981-07-28 1989-10-06 Onera (Off Nat Aerospatiale) Systeme de localisation d'une source de signaux ondulatoires
US4659982A (en) * 1984-06-21 1987-04-21 Centre National De La Recherches Scientifique Microwave apparatus and method of operation to determine position and/or speed of a movable body or discontinuity or change in a material
US4750215A (en) * 1986-06-24 1988-06-07 Cincinnati Microwave, Inc. Police radar signal detection circuitry for a police radar warning receiver
DE3825160A1 (de) * 1988-07-23 1990-01-25 Rohde & Schwarz Messgeraet fuer hochfrequenzsignale
US5334984A (en) * 1989-06-02 1994-08-02 Tokyo Keiki Co., Ltd. Method and system for locating direction of transmission source based on wave therefrom

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3120000A (en) * 1961-07-27 1964-01-28 Raymond M Wilmotte Radio direction finding systems
FR2181553B1 (fr) * 1972-04-28 1977-08-26 Labo Cent Telecommunicat
US3961172A (en) * 1973-12-03 1976-06-01 Robert Stewart Hutcheon Real-time cross-correlation signal processor
US3935437A (en) * 1974-02-25 1976-01-27 Sanders Associates, Inc. Signal processor

Also Published As

Publication number Publication date
DE2715819A1 (de) 1977-10-20
FR2347690A1 (fr) 1977-11-04
GB1579329A (en) 1980-11-19
US4131890A (en) 1978-12-26

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse