Interference suppression unit for a sonar apparatus

Details Interference suppression unit for a sonar apparatus Interference suppression unit for a sonar apparatus

1983-02-22

1985-10-22

Farley, Richard A.

Communications, electrical: acoustic wave systems and devices

Echo systems

Returned signal used for control

367103, G01S 766, G01S 1506

Patent

active

045492867

ABSTRACT:
Sonar apparatus provided with a beamforming network (1) containing several receiving channels (4A-M) for supplying, for each direction of beam incidence, digital composite signal products obtained by superposition of the receiving channel output signals and for transforming the signal products to a low-frequency band. The signal products are fed to a signal analysing circuit (3) comprising blocking circuits (62 and 63), and to a noise detector (61) for deriving, for each direction of beam incidence, a blocking circuit control voltage from the interference signal components in the signal products. The noise detector selects signals outside the low-frequency band part representing the transmitting/receiving band, and determines the modulus of the filtered signals and the average value thereof. The modulus and, after thresholding, the average value are fed to a comparator (77) to generate the control voltage.

REFERENCES:
patent: 2978577 (1961-04-01), Ketchledge
patent: 3609672 (1971-09-01), Bossert

Affiliated with

Also associated with

Rating

Interference suppression unit for a sonar apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Interference suppression unit for a sonar apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interference suppression unit for a sonar apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-125584