Adaptive Radar Techniques. Volume II. Angle Tracking with an Adaptive Array.
TECHNOLOGY SERVICE CORP SANTA MONICA CALIF
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NAS FOR RADAR. This Volume II describes a technique for angle tracking with adaptive array antennas. As in conventional monopulse systems, two receiving beams are formed a sum beam Sigma and a difference beam Delta. Each of these beams is formed with adaptively controlled weights which generate antenna patterns with nulls on sidelobe jammers. Since the array weights and antenna patterns vary with the external noise field distribution, the conventional angle estimator SigmaDelta does not provide an accurate angle estimate. An expression for estimating target angle off boresight, based on the Sigma and Delta beam outputs and the adaptive weights, is derived in this report. Simulation results show that this angle estimation equation and the adaptive Sigma and Delta array outputs provide good angle tracking accuracy in jamming environments where conventional non-adpative monopulse tracking fails. Author
- Active and Passive Radar Detection and Equipment