GB1335764A - Method and apparatus for reducing noise in a transmitted signal - Google Patents

Method and apparatus for reducing noise in a transmitted signal

Info

Publication number
GB1335764A
GB1335764A GB2664371*A GB2664371A GB1335764A GB 1335764 A GB1335764 A GB 1335764A GB 2664371 A GB2664371 A GB 2664371A GB 1335764 A GB1335764 A GB 1335764A
Authority
GB
United Kingdom
Prior art keywords
signals
unit
signal
deriving
april
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
GB2664371*A
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.)
Thales SA
Original Assignee
Dassault Electronique SA
Electronique Marcal Dassault SA
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 SA, Electronique Marcal Dassault SA filed Critical Dassault Electronique SA
Publication of GB1335764A publication Critical patent/GB1335764A/en
Expired 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
    • 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
    • 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
    • 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
    • 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)
  • Manipulation Of Pulses (AREA)
  • Dc Digital Transmission (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
GB2664371*A 1970-04-17 1971-04-19 Method and apparatus for reducing noise in a transmitted signal Expired GB1335764A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB1335764A true GB1335764A (en) 1973-10-31

Family

ID=9054173

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2664371*A Expired GB1335764A (en) 1970-04-17 1971-04-19 Method and apparatus for reducing noise in a transmitted signal

Country Status (10)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2304241A (en) * 1983-08-09 1997-03-12 British Aerospace Electromagnetic interference protection
RU1841320C (ru) * 1974-05-31 2022-10-04 Акционерное общество "Центральный научно-исследовательский радиотехнический институт имени академика А.И. Берга" Буксируемая ловушка с активным ретранслятором для защиты самолетов

Families Citing this family (7)

* 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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU1841320C (ru) * 1974-05-31 2022-10-04 Акционерное общество "Центральный научно-исследовательский радиотехнический институт имени академика А.И. Берга" Буксируемая ловушка с активным ретранслятором для защиты самолетов
GB2304241A (en) * 1983-08-09 1997-03-12 British Aerospace Electromagnetic interference protection
GB2304241B (en) * 1983-08-09 1997-06-18 British Aerospace Electromagnetic interference protection

Also Published As

Publication number Publication date
DE2118350B2 (de) 1978-10-05
CH530133A (fr) 1972-10-31
LU62925A1 (enExample) 1972-02-29
NL155142B (nl) 1977-11-15
FR2088601A5 (enExample) 1972-01-07
US3706045A (en) 1972-12-12
NL7104929A (enExample) 1971-10-19
DE2118350A1 (de) 1971-10-28
JPS5332201B1 (enExample) 1978-09-07
SE376521B (enExample) 1975-05-26
DE2118350C3 (de) 1979-05-10
BE765879A (fr) 1971-10-18

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee
PCNP Patent ceased through non-payment of renewal fee