CH339954A - Dispositif permettant d'améliorer le rapport signal/bruit, notamment dans les radars - Google Patents
Dispositif permettant d'améliorer le rapport signal/bruit, notamment dans les radarsInfo
- Publication number
- CH339954A CH339954A CH339954DA CH339954A CH 339954 A CH339954 A CH 339954A CH 339954D A CH339954D A CH 339954DA CH 339954 A CH339954 A CH 339954A
- Authority
- CH
- Switzerland
- Prior art keywords
- radars
- improving
- signal
- noise ratio
- noise
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/14—Picture signal circuitry for video frequency region
- H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
-
- 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
-
- 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
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/28—Details of pulse systems
- G01S7/2806—Employing storage or delay devices which preserve the pulse form of the echo signal, e.g. for comparing and combining echoes received during different periods
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/28—Details of pulse systems
- G01S7/285—Receivers
- G01S7/292—Extracting wanted echo-signals
- G01S7/2923—Extracting wanted echo-signals based on data belonging to a number of consecutive radar periods
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/28—Details of pulse systems
- G01S7/285—Receivers
- G01S7/292—Extracting wanted echo-signals
- G01S7/2923—Extracting wanted echo-signals based on data belonging to a number of consecutive radar periods
- G01S7/2928—Random or non-synchronous interference pulse cancellers
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Radar Systems Or Details Thereof (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR339954X | 1955-05-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
CH339954A true CH339954A (fr) | 1959-07-31 |
Family
ID=8891741
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH339954D CH339954A (fr) | 1955-05-02 | 1956-05-02 | Dispositif permettant d'améliorer le rapport signal/bruit, notamment dans les radars |
Country Status (6)
Country | Link |
---|---|
US (1) | US3038155A (fr) |
BE (1) | BE547479A (fr) |
CH (1) | CH339954A (fr) |
DE (1) | DE1102220B (fr) |
GB (1) | GB801236A (fr) |
NL (2) | NL206797A (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL278201A (fr) * | 1961-05-10 | |||
CH462241A (de) * | 1965-10-08 | 1968-09-15 | Patelhold Patentverwertung | Verfahren zur Gewinnung von Kontrollgrössen zur automatischen Kompensation von linearen Verzerrungen in einem Übertragungssystem |
US3514707A (en) * | 1967-04-25 | 1970-05-26 | Whittaker Corp | Means and techniques useful in blanking interference |
US3585502A (en) * | 1968-07-31 | 1971-06-15 | Ampex | Method and apparatus for subperiod measurement of successive variable time periods |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1824635A (en) * | 1930-10-21 | 1931-09-22 | Gen Electric | Synchronization in television and facsimile transmission system |
US2487995A (en) * | 1941-05-26 | 1949-11-15 | Samuel M Tucker | Pulse echo receiver with regenerative feedback |
US2430038A (en) * | 1943-10-05 | 1947-11-04 | Bell Telephone Labor Inc | Cathode-ray device for improving signal-to-noise ratio in radar systems |
US2659079A (en) * | 1945-12-10 | 1953-11-10 | Jr Frederic Gunningham | Moving target radar system |
US2480038A (en) * | 1946-06-08 | 1949-08-23 | Bell Telephone Labor Inc | Compensation of distortion in guided waves |
GB634108A (en) * | 1947-02-20 | 1950-03-15 | Donald Harrison Black | Improvements in and relating to pulsed-signal displays in radar systems |
US2842761A (en) * | 1953-01-12 | 1958-07-08 | Sperry Rand Corp | Moving target indicator radar system |
US2710943A (en) * | 1953-08-14 | 1955-06-14 | Collins Radio Co | Mechanical squelch system |
-
0
- NL NL94264D patent/NL94264C/xx active
- BE BE547479D patent/BE547479A/xx unknown
- NL NL206797D patent/NL206797A/xx unknown
-
1956
- 1956-05-01 US US581945A patent/US3038155A/en not_active Expired - Lifetime
- 1956-05-02 CH CH339954D patent/CH339954A/fr unknown
- 1956-05-02 DE DEC12939A patent/DE1102220B/de active Pending
- 1956-05-02 GB GB13613/56A patent/GB801236A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL206797A (fr) | |
GB801236A (en) | 1958-09-10 |
BE547479A (fr) | |
DE1102220B (de) | 1961-03-16 |
US3038155A (en) | 1962-06-05 |
NL94264C (fr) |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CH551182A (fr) | Dispositif de rheoplethysmographie. | |
NL150384B (nl) | Magnetisch vasthechtbaar rupsvoertuig. | |
FR1507822A (fr) | Dispositif de séchage, notamment pour placages | |
FR1426576A (fr) | Dispositif pour la détermination du groupe sanguin | |
ES164184Y (es) | Dispositivo vertedor perfeccionado. | |
CH339954A (fr) | Dispositif permettant d'améliorer le rapport signal/bruit, notamment dans les radars | |
CH368953A (fr) | Dispositif radar utilisant l'effet "Doppler" | |
BE606021A (fr) | Dispositif pour nottoyer les réservoirs. | |
ES184329Y (es) | Dispositivo de enganche. | |
FR1261431A (fr) | Dispositif d'équilibrage utilisable notamment sur les tracteurs agricoles | |
NL163345C (nl) | Magnetische aftastkop. | |
BE762556A (fr) | Dispositif d'epandage, notamment en agriculture | |
FI51981C (fi) | Laite vapaassa maanpinnassa olevan aukon peittämiseksi. | |
NL146355B (nl) | Magnetische registratie- en weergeefinrichting, waarbij de registratieband stapsgewijs wordt voortbewogen. | |
BE744230A (fr) | Dispositif pour le decoupage de nappes | |
BE746479A (fr) | Dispositif transducteur | |
FR1351766A (fr) | Dispositif de remorquage pour luges nautiques, et analogues | |
FR1475694A (fr) | Dispositif d'examen d'échantillons, notamment pour dosimètres | |
FR2071820A5 (fr) | Dispositif pour le controle de l'evacuation des pieces, notamment sur les presses | |
CH550960A (fr) | Dispositif anti-siphon. | |
FR1508282A (fr) | Dispositif anti-vol, notamment pour des skis ou analogues | |
FR1126237A (fr) | Dispositif pour le forage de trous notamment dans le sol | |
FR1142150A (fr) | Dispositif permettant le pompage du moût, utilisable notamment dans l'industrie sucrière | |
BOURDILA et al. | Short note on echoes twice reflected by the F region observed at Djibouti(Statistical study of echoes twice reflected by F region observed at Djibouti, France- 1964) | |
Cocking | Francis Thompson: an analysis of an American filmmaker |