JPS57100363A - Automatic frequency tracking system in radar - Google Patents

Automatic frequency tracking system in radar

Info

Publication number
JPS57100363A
JPS57100363A JP55176699A JP17669980A JPS57100363A JP S57100363 A JPS57100363 A JP S57100363A JP 55176699 A JP55176699 A JP 55176699A JP 17669980 A JP17669980 A JP 17669980A JP S57100363 A JPS57100363 A JP S57100363A
Authority
JP
Japan
Prior art keywords
frequency
read signal
frequency read
transmission
circuits
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.)
Pending
Application number
JP55176699A
Other languages
Japanese (ja)
Inventor
Fumio Miyazawa
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP55176699A priority Critical patent/JPS57100363A/en
Publication of JPS57100363A publication Critical patent/JPS57100363A/en
Pending 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
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • G01S13/585—Velocity or trajectory determination systems; Sense-of-movement determination systems processing the video signal in order to evaluate or display the velocity value
    • G01S13/586—Velocity or trajectory determination systems; Sense-of-movement determination systems processing the video signal in order to evaluate or display the velocity value using, or combined with, frequency tracking means

Landscapes

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

Abstract

PURPOSE:To improve the accuracy of a frequency read signal by detecting the relations between a transmission frequency and the frequency read signal for a while after the start of transmission and correcting the frequency read signal in accordance with these relations. CONSTITUTION:The output signal of a frequency discriminator 2 is fed through sample holding circuits 11, 12 to an input inversion type integrating circuit 18 and frequency discriminator output detecting circuits 20, 21. The circuit 18 applies correction voltage to an adder 15 which corrects the frequency read signal in the direction where it coincides with the transmission frequency. On the other hand, the circuits 20, 21 apply correction voltages to a gain control circuit 17, which in turn controls the amplitude of the frequency read signal.
JP55176699A 1980-12-15 1980-12-15 Automatic frequency tracking system in radar Pending JPS57100363A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55176699A JPS57100363A (en) 1980-12-15 1980-12-15 Automatic frequency tracking system in radar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55176699A JPS57100363A (en) 1980-12-15 1980-12-15 Automatic frequency tracking system in radar

Publications (1)

Publication Number Publication Date
JPS57100363A true JPS57100363A (en) 1982-06-22

Family

ID=16018188

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55176699A Pending JPS57100363A (en) 1980-12-15 1980-12-15 Automatic frequency tracking system in radar

Country Status (1)

Country Link
JP (1) JPS57100363A (en)

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