A Parameter-Insensitive False Alarm Rate Detection Processor
Abstract
In active sonar systems, detection is the process of deciding if a target echo is present in a return. This is often accomplished by an operator who examines the sonar receiver output and decides if any portion of it is larger than the expected response due to reverberation. Detection may also be accomplished automatically using a processor that sets a threshold based on a sampling of the receiver output. In this report, a detection processor developed under the task NAV 99/027 is presented for use in active sonar systems that process returns incoherently. The statistics of the receiver output of such a system follows the two-parameter gamma probability density function (PDF). Consequently, the detection processor computes the detection threshold as a non-linear function of the ratio of two ranked values of the receiver output. The result is a detection processor that exhibits a false alarm probability that is bounded within ten percent of a design value regardless of the values of the gamma PDF parameters.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 2001
- Accession Number
- ADA392983
Entities
People
- David M. Drumheller
- Henry Lew
Organizations
- Defence Science and Technology Group