DETECTABILITY OF RECURRENCE PHENOMENA,
Abstract
The report investigates the detectability of a broad class of signals that occur in active sonar, passive sonar, and active radar. The signals investigated are detectable at low signal-to-noise ratio because they are composed of repeating waveforms. The purpose of the report is to further the theory of signal detectability for underwater acoustics by determining the detection performance for optimum receivers for various signals and signal-to-noise conditions. The work deals with a mathematical model of the signals and the noise. It is not an analysis directed at any existing detection system. For practical situations which are approximately those of the models the work yields an approximate upper bound on the detection performance that can be achieved. The specific cases of recurrent-transient signals in white Gaussian noise considered are: (1) M orthogonal waveforms, periodic recurrence, (2) M orthogonal waveforms, synchronous-Poisson recurrence, and (3) sporadic recurrent waveforms of known waveshape. These cases are important in passive sonar because they describe situations which have a wide range of waveform uncertainty as well as recurrence-time uncertainty. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1967
- Accession Number
- AD0652383
Entities
People
- David Jaarsma
- Loren W. Nolte
Organizations
- University of Michigan