SE7709119L - FILTER DEVICE INCLUDED IN A PULSE DOPER RADAR - Google Patents

FILTER DEVICE INCLUDED IN A PULSE DOPER RADAR

Info

Publication number
SE7709119L
SE7709119L SE7709119A SE7709119A SE7709119L SE 7709119 L SE7709119 L SE 7709119L SE 7709119 A SE7709119 A SE 7709119A SE 7709119 A SE7709119 A SE 7709119A SE 7709119 L SE7709119 L SE 7709119L
Authority
SE
Sweden
Prior art keywords
clutter
filter
stop band
digital filter
pulse
Prior art date
Application number
SE7709119A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE409148B (en
Inventor
B I Hegerlof
B G H Isaksson
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to SE7709119A priority Critical patent/SE409148B/en
Priority to GB7830900A priority patent/GB2002617B/en
Priority to FR7822113A priority patent/FR2400212A1/en
Priority to DE2833050A priority patent/DE2833050C2/en
Priority to FI782352A priority patent/FI65863C/en
Priority to NLAANVRAGE7808152,A priority patent/NL187872C/en
Priority to IT26665/78A priority patent/IT1098359B/en
Priority to CH855578A priority patent/CH632850A5/en
Priority to NO782748A priority patent/NO145964C/en
Priority to DK356178A priority patent/DK147428C/en
Publication of SE7709119L publication Critical patent/SE7709119L/en
Publication of SE409148B publication Critical patent/SE409148B/en

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)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Surgical Instruments (AREA)
  • Sheet Holders (AREA)
  • Electrotherapy Devices (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>
SE7709119A 1977-08-12 1977-08-12 FILTER DEVICE INCLUDED IN THE RECEIVER OF A PULSE DOPPER RADAR SE409148B (en)

Priority Applications (10)

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
GB7830900A GB2002617B (en) 1977-08-12 1978-07-24 Radar receiver for pulse doppler radar equipment
FR7822113A FR2400212A1 (en) 1977-08-12 1978-07-26 PULSE DOPPLER RADAR FILTER
DE2833050A DE2833050C2 (en) 1977-08-12 1978-07-27 Pulse Doppler radar filter arrangement
FI782352A FI65863C (en) 1977-08-12 1978-07-28 FILTER ANORDER IN PULSDOPPLERRADAR
NLAANVRAGE7808152,A NL187872C (en) 1977-08-12 1978-08-02 FILTER FOR THE RECEIVER OF A PULSE DOPPLER RADAR.
IT26665/78A IT1098359B (en) 1977-08-12 1978-08-10 DOPPLER PULSE RADAR FILTERING DEVICE
CH855578A CH632850A5 (en) 1977-08-12 1978-08-11 PULSE DOPPLER RADAR FILTER ARRANGEMENT.
NO782748A NO145964C (en) 1977-08-12 1978-08-11 FILTERING DEVICE INCLUDING A PULSE DOPPING WIRE
DK356178A DK147428C (en) 1977-08-12 1978-08-11 FILTER EQUIPMENT TO REMOVE UNSUSED ECHO SIGNALS IN AN IMPULS-Doppler RADAR RECEIVER

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
SE7709119L true SE7709119L (en) 1979-02-13
SE409148B SE409148B (en) 1979-07-30

Family

ID=20331986

Family Applications (1)

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

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)

Families Citing this family (4)

* 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
DE19654769A1 (en) * 1996-12-30 1998-07-02 Teves Gmbh Alfred Method and device for vehicle control or regulation
US6049302A (en) * 1999-05-04 2000-04-11 Boeing North American Pulsed doppler radar system with small intermediate frequency filters
GB0301614D0 (en) * 2003-01-24 2013-05-08 Qinetiq Ltd Target visibility enhancement system

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

Also Published As

Publication number Publication date
FR2400212A1 (en) 1979-03-09
CH632850A5 (en) 1982-10-29
NO782748L (en) 1979-02-13
FR2400212B1 (en) 1984-12-28
DK147428C (en) 1985-02-11
NO145964B (en) 1982-03-22
IT1098359B (en) 1985-09-07
DE2833050A1 (en) 1979-03-01
NO145964C (en) 1982-06-30
FI782352A (en) 1979-02-13
NL187872B (en) 1991-09-02
SE409148B (en) 1979-07-30
DK147428B (en) 1984-07-30
IT7826665A0 (en) 1978-08-10
GB2002617B (en) 1982-02-10
GB2002617A (en) 1979-02-21
NL187872C (en) 1992-02-03
DK356178A (en) 1979-02-13
DE2833050C2 (en) 1986-08-07
FI65863C (en) 1984-07-10
FI65863B (en) 1984-03-30
NL7808152A (en) 1979-02-14

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