RADAR SEQUENTIAL DETECTION TECHNIQUES STUDY.
Abstract
This report presents the results of a study of sequential detection techniques suitable for an electronic scan radar. The search sector of the radar is considered subdivided into many beam pointing positions and the range along any beam direction into several range bins. The number of pulses allotted in each beam pointing position is varied according to the energy received in the position being examined and is also limited by the time spent in previous positions. The purpose of the time constraint is to assure that the antenna beam returns to each position within a specified frame time. The adopted rule for allotting the quota of pulses in each beam position is called the Cyclic Queue Allotment Rule (CQAR). If the frame contains sufficient beam positions the analysis shows appreciable energy savings over both a uniform scan and a sequential scan truncated after a fixed number of pulses. The effect of multiple range bins is also analyzed using an 'absorbing barrier' model; it is established that sequential procedures can be profitably used even when a large number of parallel range and velocity bins is tested. The increase in energy savings (relative to a fixed test) over the estimates made in previous studies is caused by introducing in the analysis the range dependence of the signal-to-noise ratio. The procedure for detecting a fluctuating target is formulated and two methods are outlined for scan-to-scan and pulseto-pulse fluctuations. The results of this study will be encouraging to those who previously found the savings of a sequential procedure insufficient to justify a change from the conventional uniform scan. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1965
- Accession Number
- AD0615637
Entities
People
- Julian Bussgang