2aSP7. Spatial broadband processing of active sonar echoes.

Session: Tuesday Morning, December 3

Time: 10:30

Author: Roger F. Dwyer
Location: Processing Branch, Naval Undersea Warfare Ctr., New London, CT 06320


As shown at the 131st meeting [R. Dwyer, ``Wideband higher-order spatial processing of active sonar echoes,'' J. Acoust. Soc. Am. 99, 2497(A) (1996)] when linear sonar arrays are operated well beyond their design frequency, spatial resolution is reduced at low frequencies and grating lobes appear at higher frequencies. Because the higher-order spectrum provides more flexibility in choosing the frequency response at the output of a beamformer the deliterious effects of wide bandwidths can be reduced. New higher-order processing results will be presented for broadband active sonar waveform transmissions using general array configurations and with returns that can be expected in shallow-water environments.

ASA 132nd meeting - Hawaii, December 1996