Accession Number : AD0767210

Title :   Adaptive Radar Techniques. Volume II. Angle Tracking with an Adaptive Array.

Descriptive Note : Final rept.,

Corporate Author : TECHNOLOGY SERVICE CORP SANTA MONICA CALIF

Personal Author(s) : Davis,Roderic C. ; Brennan,Lawrence E.

Report Date : JUL 1973

Pagination or Media Count : 51

Abstract : 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 Sigma/Delta 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)

Descriptors :   (*RADAR ANTENNAS, ADAPTIVE SYSTEMS), PHASED ARRAYS, RADAR TRACKING, ANTENNA RADIATION PATTERNS, RADAR JAMMING, OPTIMIZATION, PERFORMANCE(ENGINEERING)

Subject Categories : Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE