ES8107395A1 - Digital AGC circuit for radar target detector - has gain controlled from memorised signal from counter and digital integrator circuits - Google Patents

Digital AGC circuit for radar target detector - has gain controlled from memorised signal from counter and digital integrator circuits

Info

Publication number
ES8107395A1
ES8107395A1 ES495769A ES495769A ES8107395A1 ES 8107395 A1 ES8107395 A1 ES 8107395A1 ES 495769 A ES495769 A ES 495769A ES 495769 A ES495769 A ES 495769A ES 8107395 A1 ES8107395 A1 ES 8107395A1
Authority
ES
Spain
Prior art keywords
counter
digital
gain
agc circuit
radar target
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
ES495769A
Other languages
Spanish (es)
Other versions
ES495769A0 (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
Thomson CSF 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 Thomson CSF SA filed Critical Thomson CSF SA
Publication of ES8107395A1 publication Critical patent/ES8107395A1/en
Publication of ES495769A0 publication Critical patent/ES495769A0/en
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
    • 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
    • G01S7/34—Gain of receiver varied automatically during pulse-recurrence period, e.g. anti-clutter gain control
    • 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
    • G01S7/2926—Extracting wanted echo-signals based on data belonging to a number of consecutive radar periods by integration

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Control Of Amplification And Gain Control (AREA)

Abstract

The detection is achieved by automatic control of video frequency receiver gain using a memory system. The memory contents are derived from integration of successive recurrences of the radar signals. A gain control circuit comprises a threshold circuit (2) which receives video frequency signals from a variable gain amplifier (1). If the received signals exceed a threshold value then clock signals are applied to a counter (3) and the number of pulses in a time period is applied to a subtraction circuit (4). This produces an output (No) which determines the mean noise value. The resultant output is applied to an integrator (5) containing read and write memories. This allows the new values of pulses from the counter to be stored for application to the variable gain amplifier via a D/A converter (62) to change the gain.
ES495769A 1979-10-10 1980-10-09 TARGET DETECTION DEVICE FOR RADAR SIGNALS IN THE PRESENCE OF NOISE Granted ES495769A0 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7925227A FR2467412A1 (en) 1979-10-10 1979-10-10 Digital AGC circuit for radar target detector - has gain controlled from memorised signal from counter and digital integrator circuits

Publications (2)

Publication Number Publication Date
ES8107395A1 true ES8107395A1 (en) 1981-10-01
ES495769A0 ES495769A0 (en) 1981-10-01

Family

ID=9230539

Family Applications (1)

Application Number Title Priority Date Filing Date
ES495769A Granted ES495769A0 (en) 1979-10-10 1980-10-09 TARGET DETECTION DEVICE FOR RADAR SIGNALS IN THE PRESENCE OF NOISE

Country Status (3)

Country Link
ES (1) ES495769A0 (en)
FR (1) FR2467412A1 (en)
GR (1) GR70764B (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1114531A (en) * 1964-02-12 1968-05-22 Emi Ltd Improvements relating to radar
US3505649A (en) * 1966-10-10 1970-04-07 Hughes Aircraft Co Data processor
US3719942A (en) * 1970-09-30 1973-03-06 Hughes Aircraft Co Adaptive automatic gain control for radar systems
FR2409521A1 (en) * 1977-11-22 1979-06-15 Thomson Csf FIXED ECHO ELIMINATION DEVICE, MORE PARTICULARLY ASSOCIATED WITH A RADAR SYSTEM AND RADAR SYSTEM INCLUDING IT

Also Published As

Publication number Publication date
GR70764B (en) 1983-03-16
ES495769A0 (en) 1981-10-01
FR2467412A1 (en) 1981-04-17
FR2467412B1 (en) 1983-09-23

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Legal Events

Date Code Title Description
MM4A Patent lapsed

Effective date: 19960506