Patent ID: 8179743

Claim:
A method for elimination of ghost sources from a passive sonar, the passive sonar comprising at least two linear antennas A and B, the method comprising: measuring a received signal at one or more moments t i , to determine one or more potential sources; determining, for the received signal at each of the at least two linear antennas, a Doppler frequency f and a potential value of an azimuth θ of each of the one or more potential sources; determining potential values of a speed of each of the one or more potential sources, by use of the azimuth θ and the Doppler frequency f values; and for each of the one or more potential sources, determining frequency and speed values that satisfy, for each moment t i measurement equations that link the frequency of the received signal to the frequency f 0 emitted by the potential source to the source speed and position of the potential source, to eliminate ghost signals which do not satisfy said measurement equations.