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1. WO1991000532 - METHOD FOR OPERATING A SONAR IN ACTIVE AND PASSIVE MODES

Publication Number WO/1991/000532
Publication Date 10.01.1991
International Application No. PCT/FR1990/000463
International Filing Date 22.06.1990
Chapter 2 Demand Filed 22.01.1991
IPC
G01S 15/02 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
15Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
02using reflection of acoustic waves
CPC
G01S 15/86
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
15Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
86Combinations of sonar systems with lidar systems; Combinations of sonar systems with systems not using wave reflection
Applicants
  • THOMSON-CSF [FR/FR]; 51, esplanade du Général-de-Gaulle F-92800 Puteaux, FR (AllExceptUS)
  • BAUDOUX, Jean-Pierre [FR/FR]; FR (UsOnly)
Inventors
  • BAUDOUX, Jean-Pierre; FR
Agents
  • DESPERRIER, Jean-Louis; Thomson-CSF S.C.P.I. F-92045 Paris-La Défense Cédex 67, FR
Priority Data
89/0880530.06.1989FR
Publication Language French (FR)
Filing Language French (FR)
Designated States
Title
(EN) METHOD FOR OPERATING A SONAR IN ACTIVE AND PASSIVE MODES
(FR) PROCEDE POUR FAIRE FONCTIONNER UN SONAR EN MODE ACTIF ET PASSIF
Abstract
(EN)
The invention relates to methods for receiving sonar signals in a passive mode and in an active mode. In a sonar using a digital processing of reception signals, the invention provides for the processing of such signals in an active mode during a phase (t2) situated just after the emission of the acoustic signal by the sonar and for the reconfiguration of the signal processing device (24) in order to process them according to a passive mode in a second phase (t4) which runs between the end of the first phase and the beginning of the following recursion. It allows to use only one equipment for reception of sonar signals.
(FR)
L'invention concerne les procédés pour recevoir les signaux sonars selon un mode passif et un mode actif. Elle consiste, dans un sonar utilisant un traitement numérique des signaux de réception à effectuer un traitement de ces signaux selon un mode actif pendant une phase (t2) située juste après l'émission du signal acoustique par le sonar puis à reconfigurer le dispositif de traitement (24) de ces signaux pour les traiter selon un mode passif dans une deuxième phase (t4) qui s'écoule entre la fin de la première et le début de la récurrence suivante. Elle permet de n'utiliser qu'un seul matériel de réception des signaux sonars.
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