Evaluation of Algorithms for Linear Array Beamforming on the AN/UYK-17 (XB-1) (V) Signal Processing Element,
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 28, 1975
- Accession Number
- ADA006251
Entities
People
- Judith N. Froscher
Organizations
- United States Naval Research Laboratory