Signal Detection in Inhomogeneous Reverberation,
TEXAS UNIV AT AUSTIN APPLIED RESEARCH LABS
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Signal-generated noise is called reverberation. Reverberation is considered to be a Gaussian process since the number of scatterers contributing to the process at a given time is generally large. However, for high-resolution sonar, the number of scatterers in the resolved area or volume may be so small as to result in a non-Gaussian process. The set of sonar returns resulting from consecutive projected pulses is generally considered to be a true ensemble. However, when the mean intensity varies from return to return, the set can no longer be considered to constitue a true ensemble. The overall objective of this study was to test the Gaussian and ensemble assumptions made about reverberation data at a carefully chosen smooth bottom site and to evaluate the performance of signal processors operating against the recorded reverberation.
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