JPS57182669A - Doppler frequency compensation system of encoded pulse compression radar - Google Patents

Doppler frequency compensation system of encoded pulse compression radar

Info

Publication number
JPS57182669A
JPS57182669A JP56068567A JP6856781A JPS57182669A JP S57182669 A JPS57182669 A JP S57182669A JP 56068567 A JP56068567 A JP 56068567A JP 6856781 A JP6856781 A JP 6856781A JP S57182669 A JPS57182669 A JP S57182669A
Authority
JP
Japan
Prior art keywords
doppler
frequency
target
doppler frequency
phase
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.)
Granted
Application number
JP56068567A
Other languages
Japanese (ja)
Other versions
JPH0155433B2 (en
Inventor
Natsuki Kondo
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 JP56068567A priority Critical patent/JPS57182669A/en
Publication of JPS57182669A publication Critical patent/JPS57182669A/en
Publication of JPH0155433B2 publication Critical patent/JPH0155433B2/ja
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
    • 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
    • G01S13/06—Systems determining position data of a target
    • G01S13/08—Systems for measuring distance only
    • G01S13/10—Systems for measuring distance only using transmission of interrupted, pulse modulated waves
    • G01S13/26—Systems for measuring distance only using transmission of interrupted, pulse modulated waves wherein the transmitted pulses use a frequency- or phase-modulated carrier wave

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)

Abstract

PURPOSE:To compensate doppler frequency with high accuracy even against a target havng higher Doppler frequency than PRF of a radar, by multiplying the quantity of phase compensation corresponding to the center frequency of each Doppler filter in the post-stage of a Doppler filter bank. CONSTITUTION:A reflected signal which has been radiated after executing the encoding phase modulation 2 and has been reflected from a target is converted to intermediate frequency, and is phasedetected 7 in accordance with a reference signal. A signal whose amplitude has been modulated by Doppler angle frequency omegad of the target, obtained in this way is quantized 8, is inputted to a Doppler filter bank 9 constituted of an FFT processor and a memory, FET operation of N-point is executed at every range bin being equal to sub-pulse width, and an output signal which has received a constant phase shift at every range pin is formed. subsequently, the phase quantity of this phase shift is multiplied at every rang pin corresponding to each sub-pulse, an amplitude modulated component by Doppler frequency of the target is removed, and correlation processing 11 is executed. In this way, Doppler frequency is compensated by frequency accuracy being 1/2 or less of band width of the Doppler filter.
JP56068567A 1981-05-07 1981-05-07 Doppler frequency compensation system of encoded pulse compression radar Granted JPS57182669A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56068567A JPS57182669A (en) 1981-05-07 1981-05-07 Doppler frequency compensation system of encoded pulse compression radar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56068567A JPS57182669A (en) 1981-05-07 1981-05-07 Doppler frequency compensation system of encoded pulse compression radar

Publications (2)

Publication Number Publication Date
JPS57182669A true JPS57182669A (en) 1982-11-10
JPH0155433B2 JPH0155433B2 (en) 1989-11-24

Family

ID=13377465

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56068567A Granted JPS57182669A (en) 1981-05-07 1981-05-07 Doppler frequency compensation system of encoded pulse compression radar

Country Status (1)

Country Link
JP (1) JPS57182669A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61212781A (en) * 1985-03-18 1986-09-20 Nec Corp Pulse doppler radar system
US5229775A (en) * 1991-09-06 1993-07-20 Mitsubishi Denki Kabushiki Kaisha Digital pulse compression apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6222109A (en) * 1985-07-22 1987-01-30 Mitsubishi Electric Corp Machine tool with numerical controller

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6222109A (en) * 1985-07-22 1987-01-30 Mitsubishi Electric Corp Machine tool with numerical controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61212781A (en) * 1985-03-18 1986-09-20 Nec Corp Pulse doppler radar system
US5229775A (en) * 1991-09-06 1993-07-20 Mitsubishi Denki Kabushiki Kaisha Digital pulse compression apparatus

Also Published As

Publication number Publication date
JPH0155433B2 (en) 1989-11-24

Similar Documents

Publication Publication Date Title
US4176351A (en) Method of operating a continuous wave radar
US6646587B2 (en) Doppler radar apparatus
US5546088A (en) High-precision radar range finder
US4241347A (en) PRC/FM CW Radar system
US6225943B1 (en) Method of operating pulse radar
US4333080A (en) Signal processor
US4271412A (en) Range tracker utilizing spectral analysis
US3082417A (en) Signal selection system
FR2543690B1 (en) LASER TELEMETRY AND DOPPLER MEASUREMENT SYSTEM WITH PULSE COMPRESSION
CA2010959C (en) Ranging systems
US4053889A (en) Non-linear spread spectrum transmitter/receiver for a homing system
CN112654895B (en) Radar detection method and related device
US3264643A (en) Continuous wave radar system
US3715753A (en) Coherent range and length resolution
Kostyria et al. Improvement of Mathematical Models with Time-Shift of Two-and Tri-Fragment Signals with Non-Linear Frequency Modulation
JPS57182669A (en) Doppler frequency compensation system of encoded pulse compression radar
US5115247A (en) Frequency modulated, phase coded radar
US4035800A (en) Short-pulse non-coherent MTI
US4641137A (en) Radar apparatus for determining range to an agitated reflective target
US4719468A (en) Radar system with reduced distance error
US4860017A (en) Saw circuit for generating continuous time-coherent RF carriers
AU719562B2 (en) Method for measuring the doppler shift in a detection system using ambiguous codes
EP0048170B1 (en) Radar ranging system
GB1535679A (en) Radar tracking systems
US3495242A (en) Automatic correlation circuits