METHOD FOR REMOVING POTENTIAL SOURCES FOR PASSIVE SONAR COMPRISING MULTIPLE LINEAR ANTENNAS

摘要

The present invention relates to the field of passive sonar systems simultaneously exploiting several linear antennas.It mainly consists of a method for eliminating ghost sources for a passive sonar comprising at least two linear antennas A and B, with: A first step (21 ), during which the received signal is measured for different measurement times ti, and for each antenna, the doppler frequency f, of the received signal, and the possible values of the theta azimuth of the source are determined, A second step (22) of determining the candidate values of the speed of the source, this step being carried out from the measured values of frequency f and azimuth theta, A third step (23) of removing ambiguity and rejection phantom sources during which it is determined for which candidate sources the values of speed and frequency satisfy, for each time ti of measurement, the equa measuring the frequency of the received signal at the frequency f0 emitted by the source, the speed and the position of the source.This invention mainly concerns port surveillance systems comprising several passive linear antennas placed on the bottom and distributed around from the harbor.