Acoustic intercept reciever-combined frequency and bearing proce

Details Acoustic intercept reciever-combined frequency and bearing proce Acoustic intercept reciever-combined frequency and bearing proce

1971-07-19

1996-09-24

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Distance or direction finding

By combining or comparing signals

367124, G01S 380

Patent

active

055597564

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.

REFERENCES:
patent: 3333271 (1967-07-01), Robinson et al.
patent: 3462729 (1969-08-01), Papineau et al.

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