Accession Number : ADD016142
Title : Digital Beamforming and Filtering Circuit.
Descriptive Note : Patent, Filed 11 May 92, patented 7 Dec 93,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC
Personal Author(s) : Odell, Douglas L
Report Date : 07 Dec 1993
Pagination or Media Count : 8
Abstract : A beamformer system is disclosed which includes an array of sensors such as hydrophones which produce signals from which information relating to a target is to be determined. The beamformer system includes a channel for each sensor, the channel including a variable length shift register which provides bulk delay to received signals, a FIR interpolation filter which provides vernier delay and shading. The system also includes a summation tree which adds the received signals and a sign extension/bit reversal filter to avoid authmetic overflow.
Descriptors : *BEAM FORMING, *PATENTS, *ACOUSTIC ARRAYS, *ACOUSTIC SIGNALS, DELAY, FILTERS, HYDROPHONES, INTERPOLATION, SHIFT REGISTERS, SIGNALS, TARGETS, TARGET DETECTION, SIGNAL PROCESSING, UNDERWATER ACOUSTICS, CIRCUITS, ACOUSTIC FILTERS
Subject Categories : Acoustic Detection and Detectors
Distribution Statement : APPROVED FOR PUBLIC RELEASE