ACTIVE SONAR WAVEFORM DESIGN MATCHED TO A SPHERICAL TARGET AND AN UNDERSEA CHANNEL
McCorkle, Justin C.
Ziomek, Lawrence J.
MetadataShow full item record
Traditionally, active sonar systems employ an enveloped-continuous wave (CW) or linear-frequency modulated (LFM) acoustic pulse that is transmitted into a lossy channel to interact with the target and environment where the received energy is used to determine if target detection occurs. Many frequency components of a wideband pulse are strongly attenuated due to the effects of the channel and target. In this work, a full-wave solution is used to model a complex channel frequency response. A realistic resonant sphere is used to develop the target response. To exploit the channel-target frequency response, two waveform design techniques are used: signal-to-noise ratio (SNR)-based and information-based methods. Both techniques concentrate the transmit energy in the frequency bands where the target echo is large. The advantage of the eigenwaveform (SNR-based) and the mutual-information (information-based) waveform over the wideband acoustic waveform is the increase in detection probability.
Approved for public release. distribution is unlimited
Showing items related by title, author, creator and subject.
Schulte, Walter B., III (Monterey, California. Naval Postgraduate School, 2004-06);In this thesis, the ocean was modeled as a waveguide with an ideal pressure - release surface, and an ideal rigid bottom. The ocean waveguide was then treated as a linear, time - invariant, space - variant (TISV) filter ...
Patterson, John E. (Monterey, California: Naval Postgraduate School, 2014-12);This thesis investigates a means to mitigate co-channel interference from fourth generation cellular signals in order to support passive synthetic aperture radar (SAR) imaging using those same signals. Synthetic aperture ...
Lee, Han Chuan. (Monterey, California. Naval Postgraduate School, 2009-12);The previously developed guidance law implemented onboard the Small Unmanned Aerial Vehicle (SUAV) relies exclusively on the information from the image processing software and allows the performance of coordinated SUAV ...