SE7709119L - FILTER DEVICE INCLUDED IN A PULSE DOPER RADAR - Google Patents
FILTER DEVICE INCLUDED IN A PULSE DOPER RADARInfo
- 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
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>
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)
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)
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 |
-
1977
- 1977-08-12 SE SE7709119A patent/SE409148B/en not_active IP Right Cessation
-
1978
- 1978-07-24 GB GB7830900A patent/GB2002617B/en not_active Expired
- 1978-07-26 FR FR7822113A patent/FR2400212A1/en active Granted
- 1978-07-27 DE DE2833050A patent/DE2833050C2/en not_active Expired
- 1978-07-28 FI FI782352A patent/FI65863C/en not_active IP Right Cessation
- 1978-08-02 NL NLAANVRAGE7808152,A patent/NL187872C/en not_active IP Right Cessation
- 1978-08-10 IT IT26665/78A patent/IT1098359B/en active
- 1978-08-11 CH CH855578A patent/CH632850A5/en not_active IP Right Cessation
- 1978-08-11 NO NO782748A patent/NO145964C/en unknown
- 1978-08-11 DK DK356178A patent/DK147428C/en not_active IP Right Cessation
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1348078A (en) | Adaptive moving target indicator clutter filter | |
SE7709119L (en) | FILTER DEVICE INCLUDED IN A PULSE DOPER RADAR | |
FR2360086A1 (en) | DEVICE ALLOWING THE IMPROVEMENT OF THE CONTRAST BETWEEN A MAIN ECHO SIGNAL AND A SECONDARY ECHO SIGNAL RECEIVED BY A RADAR, IN PARTICULAR A PULSE COMPRESSION RADAR AND RADAR INCLUDING SUCH A DEVICE | |
GB1495782A (en) | Doppler radar device | |
US4288857A (en) | Digital integrating/auto-correlator apparatus | |
US3382496A (en) | Moving target indicator radar | |
Carsola et al. | Two short‐period internal wave frequency spectra in the sea off southern California | |
SU732755A2 (en) | Device for measuring thickness of sea ice cover | |
JPS57125868A (en) | Side looking aperture radar | |
George et al. | Comb filters for pulsed radar use | |
ES420053A1 (en) | Airborne altitude indicator device | |
GB1432431A (en) | Frequency tracking filter | |
GB2030416A (en) | Improvements in or relating to radar systems | |
FR2395651A1 (en) | METHOD AND CIRCUIT FOR DIGITAL TRANSMISSION OF ANALOGUE VALUES FOR REMOTE CONTROL OF SEVERAL INFRARED RADIATION CHANNELS | |
JPS5694904A (en) | Receiver for vehicle controlling device | |
US2912690A (en) | Aerial navigation system | |
SU553556A1 (en) | Device for determining parameters of sea waves | |
ES8304319A1 (en) | Radar signal processor | |
SU834651A1 (en) | Acoustic locator for measuring wind velocity | |
SU1173367A1 (en) | Apparatus for radar detection of flight danger and cloudy areas | |
FR2450460A1 (en) | Electrostatic field detector - has antenna responding to field and connected to amplifier of high input impedance | |
JPS53131815A (en) | Phase linear type emphasizer | |
JPS6447985A (en) | Cw radar system | |
JPS545318A (en) | Rejection system of interferring distortion caused in demodulation signal due to interference between fm signals | |
SU905894A1 (en) | Signal normalizing device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
NAL | Patent in force |
Ref document number: 7709119-7 Format of ref document f/p: F |
|
NUG | Patent has lapsed |
Ref document number: 7709119-7 Format of ref document f/p: F |