2pSPb8. Wideband higher-order spatial processing of active sonar echoes.

Session: Tuesday Afternoon, May 14

Time: 4:00

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


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 based on the second-order spectrum. 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. This will be demonstrated with active sonar waveforms returned from spherical targets.

from ASA 131st Meeting, Indianapolis, May 1996