Track Quality Indicator with Hysteresis
Abstract
A first object of the present invention is providing a method for indicating the quality of tracks in a passive sonar system. Another object of the invention is providing such a method that is not overly sensitive to track status changes. Accordingly, the present invention is directed to a method and apparatus for calculating a track quality indicator from a plurality of tracker amplitude estimates. In one embodiment, the method utilizes the track quality indicator at the previous time increment. The track quality indicator is assigned as a lost track based on a first lost track threshold if the track quality indicator at the previous time increment indicated a lost track and based on a second lost track threshold if the track quality indicator at the previous time increment indicated a different status. The track quality indicator is assigned as an uncertain track based on a first uncertain track threshold if the track quality indicator at the previous time increment indicated a lost track or an uncertain track and based on a second uncertain track threshold if the track quality indicator at the previous time increment indicated a different status. The track quality indicator is assigned as a low signal to& noise ratio (SNR) track based on a first low SNR track threshold if the track quality indicator at the previous time increment indicated a strong track and based on a second low SNR track threshold if the track quality indicator at the previous time increment indicated a different status. The track quality indicator is assigned as a strong track if another track quality indicator is not assigned. The method continues to the next time increment after the track quality indicator is assigned.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 08, 2003
- Accession Number
- ADD020051
Entities
People
- Walter R. Lane
Organizations
- Naval Undersea Warfare Center