Acoustic intercept reciever-combined frequency and bearing processor
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorGeorge C. Connolly, Jr.
Life of this patent
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Abstract
A signal processor for obtaining frequency and bearing information of an ustical signal. Responsive to the acoustical signal, a multimode hydrophone generates a plurality of electrical signals which are combined to form a first omnidirectional signal and two spatially orthogonal directional signals. The directional signals are then combined to form a second omnidirectional signal. Additional circuitry is provided to analyze the two omnidirectional signals using the cross-spectral density function of the two omnidirectional signals to obtain said frequency and bearing information.
Claims6
A signal processor for obtaining bearing and frequency information of a plane-wave acoustical signal comprising:
- a hydrophone for generating a plurality of electrical signals responsive to such acoustical signal;
- means for combining said electrical signals into a first omnidirectional signal and two spatially orthogonal directional signals containing the frequency and bearing information;
- means for combining the two directional signals to form a second omnidirectional signal;
- and
- a circuit for extracting said bearing and frequency information from the first and second omnidirectional signals.
A method for obtaining frequency and bearing information of an acoustical signal comprising:
- generating four electrical signals in response to an acoustical signal;
- combining the four electrical signals, forming two directional signals and a first omnidirectional signal;
- combining the two directional signals into a second omnidirectional signal;
- and then
- extracting the frequency and bearing information of the acoustical signal.
Dependencies are inferred from the claim text.