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1. WO2011006833 - DETECTION OF SMALL QUICK TARGETS BY NON-COHERENT POST-INTEGRATION USING A SLIDING CLASSIFICATION ALGORITHM

Publication Number WO/2011/006833
Publication Date 20.01.2011
International Application No. PCT/EP2010/059823
International Filing Date 08.07.2010
IPC
G01S 7/292 2006.01
GPHYSICS
01MEASURING; TESTING
SRADIO 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
7Details of systems according to groups G01S13/, G01S15/, G01S17/127
02of systems according to group G01S13/58
28Details of pulse systems
285Receivers
292Extracting wanted echo-signals
CPC
G01S 13/426
GPHYSICS
01MEASURING; TESTING
SRADIO 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
13Systems 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
02Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
06Systems determining position data of a target
42Simultaneous measurement of distance and other co-ordinates
426Scanning radar, e.g. 3D radar
G01S 7/2926
GPHYSICS
01MEASURING; TESTING
SRADIO 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
7Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
02of systems according to group G01S13/00
28Details of pulse systems
285Receivers
292Extracting wanted echo-signals
2923based on data belonging to a number of consecutive radar periods
2926by integration
Applicants
  • THALES [FR]/[FR] (AllExceptUS)
  • GROENENBOOM, Albert [NL]/[NL] (UsOnly)
Inventors
  • GROENENBOOM, Albert
Agents
  • LUCAS, Laurent
Priority Data
090346315.07.2009FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) DETECTION OF SMALL QUICK TARGETS BY NON-COHERENT POST-INTEGRATION USING A SLIDING CLASSIFICATION ALGORITHM
(FR) DÉTECTION DE CIBLES RAPIDES DE PETITES TAILLES PAR POST INTÉGRATION NON COHÉRENTE UTILISANT UN ALGORITHME DE CLASSEMENT GLISSANT
Abstract
(EN)
The invention relates to a method for non-coherent integration and detection applied to data received during two consecutive scans of a predetermined area of space by a detection system, such as a radar, entrusted with observing the area. The inventive method comprises cutting the space in question into analysis cells and measuring the power received in each one of the cells over two consecutive scans. The method next comprises determining for each cell m a neighbourhood vm made up of juxtaposed cells located in an area with predetermined dimensions surrounding the cell in question. The invention finally comprises successively calculating for each cell m the sum of the energy measured in said cell during a predetermined scan n+1 and the energy measured during the previous scan n in each one of the L cells of the neighbourhood vm which have the L highest measured energy values, and then comparing each result with a threshold T. Henceforth, a detection is carried out for the cell m every time a result exceeds the threshold T. The L cells to be considered are defined by implementing a specific algorithm suitable for limiting the calculation load produced by said operation.
(FR)
L'invention concerne un procédé d'intégration non cohérente et de détection, appliqué aux données reçues pendant deux balayages successifs d'une zone d'espace donnée par un système de détection, de type radar par exemple, chargé de l'observation de la zone. Le procédé selon l'invention consiste à découper l'espace considéré en cellules d'analyse et à mesurer la puissance reçue dans chacune des cellules pour deux balayages successifs. Il consiste ensuite à déterminer pour chaque cellule m un voisinage vm constitué de cellules juxtaposées situées dans une zone de dimensions données entourant la cellule considérée. Il consiste enfin à effectuer successivement pour chaque cellule m la somme de l'énergie mesurée dans cette cellule pour un balayage n+1 donné et de l'énergie mesurée, pour le balayage précédent n, dans chacune des L cellules du voisinage vm qui présentent les L valeur d'énergie mesurée les plus importantes, puis à comparer chaque résultat à un seuil T. Par suite une détection est opérée pour la cellule m chaque fois qu'un résultat dépasse le seuil T. La détermination des L cellules à considérer est réalisée en mettant en œuvre un algorithme particulier permettant de limiter la charge de calcul occasionnée par cette opération.
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