Accession Number : ADA006251
Title : Evaluation of Algorithms for Linear Array Beamforming on the AN/UYK-17 (XB-1) (V) Signal Processing Element,
Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C
Personal Author(s) : Froscher,Judith N.
Report Date : 28 JAN 1975
Pagination or Media Count : 49
Abstract : An overview of linear passive array beamforming is presented, the respective advantages of time-domain and frequency-domain beamforming are examined with processing by the Signal Processing Arithmetic Unit (SPAU) in mind, and three frequency-domain beamforming algorithms are analyzed. The SPAU has two's complement, fixed-point, rounded arithmetic. Through SPAU simulation, the effects of quantization are studied for two cases. First, the effect that quantization error has on the suppression of a weak signal in the desired direction by a strong interfering signal is examined by the determination of discrepancies between 'ideal' and fixed-point response curves. Second, a statistical study is undertaken to ascertain whether the error due to finite register length produces any major divergence from perfect results when a weak signal response is polluted with noise. Finally, the three frequency-domain algorithms are studied with regard to the efficient use of the SPAU's hardware.
Descriptors : *Signal processing, *Acoustic arrays, Linear arrays, Passive systems, Beam forming, Algorithms
Subject Categories : Acoustic Detection and Detectors
Distribution Statement : APPROVED FOR PUBLIC RELEASE