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Beamforming when the sound velocity is not precisely known
(Acoustical Society of America, 1980-08)
Beamforming is an integral part of most signal processingsystems in active or passive sonars. The delays used to generate a beam are functions of the sound velocity, which depends on temperature, salinity, and pressure. ...
Frequency-wave number array processing
(Acoustical Society of America, 1981-03)
Most array signal processing systems use delay-and-sum beamforming to estimate source bearings. This paper demonstrates the close relationship between beamforming and frequency-wavenumber spectrum analysis. The latter ...