JPS55101878A - Pulse doppler radar - Google Patents

Pulse doppler radar

Info

Publication number
JPS55101878A
JPS55101878A JP921279A JP921279A JPS55101878A JP S55101878 A JPS55101878 A JP S55101878A JP 921279 A JP921279 A JP 921279A JP 921279 A JP921279 A JP 921279A JP S55101878 A JPS55101878 A JP S55101878A
Authority
JP
Japan
Prior art keywords
pulse
different frequencies
carrier frequency
repetition frequency
pulse repetition
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
JP921279A
Other languages
Japanese (ja)
Other versions
JPS6252270B2 (en
Inventor
Kozo Okada
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.)
Tokyo Keiki Inc
Original Assignee
Tokyo Keiki Co Ltd
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 Tokyo Keiki Co Ltd filed Critical Tokyo Keiki Co Ltd
Priority to JP921279A priority Critical patent/JPS55101878A/en
Publication of JPS55101878A publication Critical patent/JPS55101878A/en
Publication of JPS6252270B2 publication Critical patent/JPS6252270B2/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
    • G01S13/50—Systems of measurement based on relative movement of target
    • G01S13/52—Discriminating between fixed and moving objects or between objects moving at different speeds
    • G01S13/522—Discriminating between fixed and moving objects or between objects moving at different speeds using transmissions of interrupted pulse modulated waves
    • G01S13/524—Discriminating between fixed and moving objects or between objects moving at different speeds using transmissions of interrupted pulse modulated waves based upon the phase or frequency shift resulting from movement of objects, with reference to the transmitted signals, e.g. coherent MTi
    • G01S13/526—Discriminating between fixed and moving objects or between objects moving at different speeds using transmissions of interrupted pulse modulated waves based upon the phase or frequency shift resulting from movement of objects, with reference to the transmitted signals, e.g. coherent MTi performing filtering on the whole spectrum without loss of range information, e.g. using delay line cancellers or comb filters
    • G01S13/528—Discriminating between fixed and moving objects or between objects moving at different speeds using transmissions of interrupted pulse modulated waves based upon the phase or frequency shift resulting from movement of objects, with reference to the transmitted signals, e.g. coherent MTi performing filtering on the whole spectrum without loss of range information, e.g. using delay line cancellers or comb filters with elimination of blind speeds

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 enhance detection probability at receival of small signals by changing to different frequencies both pulse repetition frequency of transmission signal and its carrier frequency at the same time in pulse doppler radar in which relative speed and relative distance of the target is detected by discrete power spectrum. CONSTITUTION:Pulse repetition frequency Fi of transmission pulse and its carrier frequency fi are changed to different frequencies at the same time, so that the relation fi/Fi=k (constant) can be always maintained. In this case, pulse train of target with velocity v to DPS converter is expressed by the equation in which [Xn] is dependent only on phase phii and is independent of other i, ¦Xp¦<2> does not change with phase (phii) of [Xn], so [¦Xp¦<2>] does not change with i. Therefore, if both pulse if both pulse repetition frequency Fi and carrier frequency fi, while maintaining proportional relationship, are changed to different frequencies, then when multiple PRT are used, discrete power spectrum [¦Xp¦<2>] always holds the same response to relative velocity (v).
JP921279A 1979-01-31 1979-01-31 Pulse doppler radar Granted JPS55101878A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP921279A JPS55101878A (en) 1979-01-31 1979-01-31 Pulse doppler radar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP921279A JPS55101878A (en) 1979-01-31 1979-01-31 Pulse doppler radar

Publications (2)

Publication Number Publication Date
JPS55101878A true JPS55101878A (en) 1980-08-04
JPS6252270B2 JPS6252270B2 (en) 1987-11-04

Family

ID=11714147

Family Applications (1)

Application Number Title Priority Date Filing Date
JP921279A Granted JPS55101878A (en) 1979-01-31 1979-01-31 Pulse doppler radar

Country Status (1)

Country Link
JP (1) JPS55101878A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04265883A (en) * 1991-02-20 1992-09-22 Mitsubishi Electric Corp Radar device
JPH05196726A (en) * 1991-08-08 1993-08-06 Raytheon Co Method and apparatus for controlling sensitivity and speed
WO2007057475A2 (en) * 2005-11-21 2007-05-24 Plextek Limited Improvements to doppler radar systems
US7737886B2 (en) 2005-11-21 2010-06-15 Plextek Limited Doppler radar systems

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7046190B2 (en) * 2003-07-25 2006-05-16 Raytheon Company Process for phase-derived range measurements

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04265883A (en) * 1991-02-20 1992-09-22 Mitsubishi Electric Corp Radar device
JPH05196726A (en) * 1991-08-08 1993-08-06 Raytheon Co Method and apparatus for controlling sensitivity and speed
WO2007057475A2 (en) * 2005-11-21 2007-05-24 Plextek Limited Improvements to doppler radar systems
WO2007057475A3 (en) * 2005-11-21 2007-08-02 Plextek Ltd Improvements to doppler radar systems
US7737886B2 (en) 2005-11-21 2010-06-15 Plextek Limited Doppler radar systems
AU2006314462B2 (en) * 2005-11-21 2011-04-07 Plextek Limited Improvements to Doppler radar systems
US7956799B2 (en) * 2005-11-21 2011-06-07 Plextek Limited Frequency scanning radar system

Also Published As

Publication number Publication date
JPS6252270B2 (en) 1987-11-04

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