BE765879A - Procede electrique et dispositif pour l'elimination du bruit d'une reception de signaux electromagnetiques - Google Patents

Procede electrique et dispositif pour l'elimination du bruit d'une reception de signaux electromagnetiques

Info

Publication number
BE765879A
BE765879A BE765879A BE765879A BE765879A BE 765879 A BE765879 A BE 765879A BE 765879 A BE765879 A BE 765879A BE 765879 A BE765879 A BE 765879A BE 765879 A BE765879 A BE 765879A
Authority
BE
Belgium
Prior art keywords
elimination
reception
noise
electromagnetic signals
electrical process
Prior art date
Application number
BE765879A
Other languages
English (en)
Original Assignee
Dassault Electronique
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 Dassault Electronique filed Critical Dassault Electronique
Publication of BE765879A publication Critical patent/BE765879A/fr

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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/28—Details of pulse systems
    • G01S7/285—Receivers
    • G01S7/292—Extracting wanted echo-signals
    • G01S7/2923—Extracting wanted echo-signals based on data belonging to a number of consecutive radar periods
    • G01S7/2927—Extracting wanted echo-signals based on data belonging to a number of consecutive radar periods by deriving and controlling a threshold value
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/04—Limiting level dependent on strength of signal; Limiting level dependent on strength of carrier on which signal is modulated
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/341—Muting when no signals or only weak signals are present
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/344—Muting responsive to the amount of noise (noise squelch)

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Noise Elimination (AREA)
  • Amplifiers (AREA)
BE765879A 1970-04-17 1971-04-16 Procede electrique et dispositif pour l'elimination du bruit d'une reception de signaux electromagnetiques BE765879A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7014004A FR2088601A5 (fr) 1970-04-17 1970-04-17

Publications (1)

Publication Number Publication Date
BE765879A true BE765879A (fr) 1971-10-18

Family

ID=9054173

Family Applications (1)

Application Number Title Priority Date Filing Date
BE765879A BE765879A (fr) 1970-04-17 1971-04-16 Procede electrique et dispositif pour l'elimination du bruit d'une reception de signaux electromagnetiques

Country Status (10)

Country Link
US (1) US3706045A (fr)
JP (1) JPS5332201B1 (fr)
BE (1) BE765879A (fr)
CH (1) CH530133A (fr)
DE (1) DE2118350C3 (fr)
FR (1) FR2088601A5 (fr)
GB (1) GB1335764A (fr)
LU (1) LU62925A1 (fr)
NL (1) NL155142B (fr)
SE (1) SE376521B (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889108A (en) * 1974-07-25 1975-06-10 Us Navy Adaptive low pass filter
US3961274A (en) * 1975-03-10 1976-06-01 The United States Of America As Represented By The Secretary Of The Navy Noise riding threshold
GB1578374A (en) * 1976-11-08 1980-11-05 Clarion Co Ltd Noise reduction in audio reproducing systems
PL112944B1 (en) * 1977-12-02 1980-11-29 Device for communication by means of a computer with telemetric channels
DD142974B1 (de) * 1979-04-27 1984-11-07 Eberhard Lemke Schaltungsanordnung zur unterdrueckung von stoersignalen
JPS56147525A (en) * 1980-04-18 1981-11-16 Hitachi Ltd Reception playback system
FR2505579A1 (fr) * 1981-05-08 1982-11-12 Agence France Presse Procede pour la reconstitution par filtrage, d'un signal analogique a partir d'un signal pseudoanalogique obtenu par double conversion analogique/numerique, numerique/analogique dudit signal analogique avec traitement eventuel du signal numerique
GB2304241B (en) * 1983-08-09 1997-06-18 British Aerospace Electromagnetic interference protection

Also Published As

Publication number Publication date
DE2118350A1 (de) 1971-10-28
JPS5332201B1 (fr) 1978-09-07
SE376521B (fr) 1975-05-26
NL7104929A (fr) 1971-10-19
DE2118350C3 (de) 1979-05-10
CH530133A (fr) 1972-10-31
LU62925A1 (fr) 1972-02-29
FR2088601A5 (fr) 1972-01-07
NL155142B (nl) 1977-11-15
DE2118350B2 (de) 1978-10-05
US3706045A (en) 1972-12-12
GB1335764A (en) 1973-10-31

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