Patent ID: 7201054

Claim:
A system for determining a direction of arrival of a signal emitted by a source, said system comprising: a first transducer for receiving the emitted signal and for providing a first transducer output signal corresponding to the emitted signal received by the first transducer; a second transducer spaced a distance D 12 from the first transducer, said second transducer for receiving the emitted signal and for providing a second transducer output signal corresponding to the emitted signal received by the second transducer; a first receiver for receiving the first transducer output signal and for providing a first receiver output signal indicating the phase of the first transducer output signal received by the first transducer; a second receiver for receiving the second transducer output signal and for providing a second receiver output signal indicating the phase of the second transducer output signal received by the second transducer; a processor for receiving the first receiver output signal and the second receiver output signal, said processor determining a first set of interferometer planes corresponding to a phase difference between the first transducer output signal and the second transducer output signal, said phase difference being a function of the distance D 12 , and said processor for providing output information corresponding to a direction of arrival of the emitted signal relative to the first and second transducers, wherein the output information is a function of an intersection of the set of interferometer planes with a direction cosine sphere.