GB1308089A - Signal processor particularly for doppler radar system - Google Patents

Signal processor particularly for doppler radar system

Info

Publication number
GB1308089A
GB1308089A GB4728871A GB4728871A GB1308089A GB 1308089 A GB1308089 A GB 1308089A GB 4728871 A GB4728871 A GB 4728871A GB 4728871 A GB4728871 A GB 4728871A GB 1308089 A GB1308089 A GB 1308089A
Authority
GB
United Kingdom
Prior art keywords
signal
pulse
fed
band
pulse modulator
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
GB4728871A
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.)
Raytheon Co
Original Assignee
Raytheon Co
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 Raytheon Co filed Critical Raytheon Co
Publication of GB1308089A publication Critical patent/GB1308089A/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
    • 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
    • G01S13/53—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 a single spectral line and associated with one or more range gates with a phase detector or a frequency mixer to extract the Doppler information, e.g. pulse Doppler radar
    • 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

Abstract

1308089 Pulse radar RAYTHEON CO 11 Oct 1971 [23 Nov 1970] 47288/71 Heading H4D In an arrangement for improving the ratio of a desired signal S D of input carrier frequency F 1 to an undesired signal S U of input carrier frequency F 2 , the combined signal is fed to a pulse modulator from which signal S D has all its energy substantially within a predetermined frequency band FB and signal S U has a carrier frequency outside band FB and part of its sidebands within band FB; 'the pulse modulator output is fed to a filter which significantly attenuates outside band FB and whereby signal S U has a transient portion and a steady-state portion; and the filter output is applied to a switch, actuated synchronously with the pulse modulator, whereby the signals during the steady-state portion are fed to utilization means. In the embodiment signals S D , S U are from moving and stationary targets respectively in a coherent pulse Doppler radar and the pulse modulator is a range gate. It may be applied to F.M.C.W. radars.
GB4728871A 1970-11-23 1971-10-11 Signal processor particularly for doppler radar system Expired GB1308089A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US9172370A 1970-11-23 1970-11-23

Publications (1)

Publication Number Publication Date
GB1308089A true GB1308089A (en) 1973-02-21

Family

ID=22229350

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4728871A Expired GB1308089A (en) 1970-11-23 1971-10-11 Signal processor particularly for doppler radar system

Country Status (11)

Country Link
US (1) US3706095A (en)
JP (1) JPS5120278B1 (en)
AU (1) AU459613B2 (en)
BE (1) BE775477A (en)
CA (1) CA967671A (en)
DE (1) DE2157342C3 (en)
FR (1) FR2115186B1 (en)
GB (1) GB1308089A (en)
IL (1) IL37880A (en)
IT (1) IT942256B (en)
NL (1) NL182246C (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4079378A (en) * 1977-02-28 1978-03-14 General Dynamics Corporation Coherent pulse radar system with time-shared frequency source
DE2907315A1 (en) * 1979-02-24 1980-08-28 Philips Patentverwaltung CIRCUIT ARRANGEMENT FOR EVALUATING DOPPLER RADAR SIGNALS FOR A DOPPLER RADAR IN THE GHZ RANGE
FR2472759A1 (en) * 1979-12-28 1981-07-03 Thomson Csf DEVICE FOR REMOVING FIXED ECHO IN ELECTROMAGNETIC DETECTION EQUIPMENT AND EQUIPMENT COMPRISING SUCH A DEVICE
US5327141A (en) * 1986-11-06 1994-07-05 Raytheon Company Clutter removal by polynomial compensation
US5508605A (en) * 1994-05-24 1996-04-16 Alliedsignal Inc. Method for measuring RF pulse frequency
US5805460A (en) * 1994-10-21 1998-09-08 Alliedsignal Inc. Method for measuring RF pulse rise time, fall time and pulse width
US5519399A (en) * 1994-12-05 1996-05-21 Alliedsignal Inc. Method for measuring the frequency of continuous wave and wide pulse RF signals
EP2009461A1 (en) * 2006-04-20 2008-12-31 Anritsu Corporation Short-pulse radar and method for controlling the same

Also Published As

Publication number Publication date
JPS5120278B1 (en) 1976-06-23
DE2157342B2 (en) 1973-11-15
IL37880A0 (en) 1972-01-27
BE775477A (en) 1972-03-16
AU3445971A (en) 1973-04-19
NL7116092A (en) 1972-05-25
IT942256B (en) 1973-03-20
NL182246C (en) 1988-02-01
FR2115186A1 (en) 1972-07-07
IL37880A (en) 1974-03-14
NL182246B (en) 1987-09-01
CA967671A (en) 1975-05-13
DE2157342C3 (en) 1974-06-12
US3706095A (en) 1972-12-12
DE2157342A1 (en) 1972-05-31
FR2115186B1 (en) 1977-01-21
AU459613B2 (en) 1975-04-10

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PE20 Patent expired after termination of 20 years