An Optimum Interference Detector for DABS (Discrete Address Beacon Systems) Monopulse Data Editing
Abstract
ion must be made using as few replies as possible, preferably one. This requires the use of monopulse techniques. Since the beacon system provides high signal-to-noise ratios (SNR), the fundamental limitation to direction finding (DF) performance is due to externally generated interference from multipath signals and from the present Air Traffic Control Radar Beacon System (ATCRBS). Since there are many bits in any one DABS reply it should be possible to generate an accurate azimuth estimate if those that bear interference could be detected and deleted from the sample. In the report, the generalized likelihood ratio test is used to derive an optimum interference statistic. The detector performance is then analyzed in detail with respect to its dependence on SNR, interference-to-signal ratio (ISR) on the relative phase between the target and interfering signals. It is shown that good detection performance can be obtained if the phase difference between the target and interference signals are either in- or out-of-phase.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 26, 1973
- Accession Number
- AD0769337
Entities
People
- R. J. Mcaulay
- T. P. Mcgarty
Organizations
- Massachusetts Institute of Technology