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GB2002617A - Pulse doppler radar - Google Patents

Pulse doppler radar

Info

Publication number
GB2002617A
GB2002617A GB7830900A GB7830900A GB2002617A GB 2002617 A GB2002617 A GB 2002617A GB 7830900 A GB7830900 A GB 7830900A GB 7830900 A GB7830900 A GB 7830900A GB 2002617 A GB2002617 A GB 2002617A
Authority
GB
United Kingdom
Prior art keywords
clutter
filter
stop band
digital filter
band
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
GB7830900A
Other versions
GB2002617B (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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB2002617A publication Critical patent/GB2002617A/en
Application granted granted Critical
Publication of GB2002617B publication Critical patent/GB2002617B/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
    • G01S13/526—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

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)
  • Surgical Instruments (AREA)
  • Sheet Holders (AREA)
  • Electrotherapy Devices (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)

Abstract

A receiver for pulse Doppler radar equipment using p.r.f. staggering includes a digital filter arrangement for reducing clutter within a lower speed range (Sg) and a higher speed range (Sm). The arrangement includes a first digital filter (DF1) having a pass band/ stop band characteristic such that the lower clutter is rejected by the lowest stop band of the first filter but the desired target echo signal(s) falls within a pass band, a circuit (HK) connected to an output of the first filter for calculating a dominating frequency component of the higher clutter (Sm) and carrying out a downwards transfer in frequency of the clutter signals recovered from the first filter so that the mean frequency of the higher clutter assumes a value within the first stop band of a second digital filter (DF2), substantially coinciding with the first stop band of the first filter in order to suppress the higher clutter. <IMAGE>
GB7830900A 1977-08-12 1978-07-24 Radar receiver for pulse doppler radar equipment Expired GB2002617B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7709119A SE409148B (en) 1977-08-12 1977-08-12 FILTER DEVICE INCLUDED IN THE RECEIVER OF A PULSE DOPPER RADAR

Publications (2)

Publication Number Publication Date
GB2002617A true GB2002617A (en) 1979-02-21
GB2002617B GB2002617B (en) 1982-02-10

Family

ID=20331986

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7830900A Expired GB2002617B (en) 1977-08-12 1978-07-24 Radar receiver for pulse doppler radar equipment

Country Status (10)

Country Link
CH (1) CH632850A5 (en)
DE (1) DE2833050C2 (en)
DK (1) DK147428C (en)
FI (1) FI65863C (en)
FR (1) FR2400212A1 (en)
GB (1) GB2002617B (en)
IT (1) IT1098359B (en)
NL (1) NL187872C (en)
NO (1) NO145964C (en)
SE (1) SE409148B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998029279A3 (en) * 1996-12-30 1999-02-18 Itt Mfg Enterprises Inc Method and device for steering or controlling a vehicle
US6049302A (en) * 1999-05-04 2000-04-11 Boeing North American Pulsed doppler radar system with small intermediate frequency filters
GB2521097A (en) * 2003-01-24 2015-06-17 Qinetiq Ltd Target visibility enhancement system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2632420B1 (en) * 1987-10-16 1990-10-12 Thomson Csf METHOD AND DEVICE FOR COMPENSATING THE SPEED OF CLOUD IN A COHERENT DOPPLER RADAR AT AMBIGUOUS VARIABLE SPEED

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3742500A (en) * 1970-08-24 1973-06-26 Raytheon Co Mti radar
DE2212272A1 (en) * 1971-03-17 1972-09-28 Int Standard Electric Corp Impulse Doppler radar device
US3962704A (en) * 1974-05-31 1976-06-08 Hughes Aircraft Company Moving target indicator clutter tracker
US4035799A (en) * 1975-11-04 1977-07-12 The United States Of America As Represented By The Secretary Of The Navy Digital mean clutter doppler compensation system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998029279A3 (en) * 1996-12-30 1999-02-18 Itt Mfg Enterprises Inc Method and device for steering or controlling a vehicle
EP1285808A1 (en) * 1996-12-30 2003-02-26 Continental Teves AG & Co. oHG Method and means of controlling and regulating a vehicle
US6049302A (en) * 1999-05-04 2000-04-11 Boeing North American Pulsed doppler radar system with small intermediate frequency filters
GB2521097A (en) * 2003-01-24 2015-06-17 Qinetiq Ltd Target visibility enhancement system
GB2521097B (en) * 2003-01-24 2016-03-23 Qinetiq Ltd Target visibility enhancement system

Also Published As

Publication number Publication date
FI782352A7 (en) 1979-02-13
DK147428C (en) 1985-02-11
SE409148B (en) 1979-07-30
NO145964C (en) 1982-06-30
FI65863C (en) 1984-07-10
DE2833050A1 (en) 1979-03-01
FI65863B (en) 1984-03-30
FR2400212A1 (en) 1979-03-09
FR2400212B1 (en) 1984-12-28
SE7709119L (en) 1979-02-13
IT7826665A0 (en) 1978-08-10
DE2833050C2 (en) 1986-08-07
DK147428B (en) 1984-07-30
NO782748L (en) 1979-02-13
NO145964B (en) 1982-03-22
NL187872C (en) 1992-02-03
IT1098359B (en) 1985-09-07
CH632850A5 (en) 1982-10-29
GB2002617B (en) 1982-02-10
NL7808152A (en) 1979-02-14
NL187872B (en) 1991-09-02
DK356178A (en) 1979-02-13

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Effective date: 19980723