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
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE