RADAR DETECTION OF ENDO-CLUTTER HIGH-VALUE TARGETS USING TRACKER FEEDBACK

摘要

A radar signal target detection and display system employs feedback to produce improved detection and tracking. Portions of the radar images for each antenna channel to search for the target of interest are defined using the track state to define the center of the search region and using the track covariance matrix to define the size of the region. Moving reference processing (MRP) is performed. MRP employs a search centered on the motion state derived from the detection sent to the tracker on the previous coherent processing interval (CPI). Space-time adaptive processing (STAP) is employed on each CPI using a unique set of adaptive degrees of freedom (DOFs) derived from pre-MRP and post-MRP complex radar image amplitudes for each antenna channel.

主权项

1. A system for radar detection of endo-clutter targets using tracker feedback, comprising:
selecting an endo-clutter target to be tracked; tracking said endo-clutter target using a synthetic aperture radar (SAR) having a plurality of antenna channels; for each of a plurality of coherent processing intervals (CPIs): employing polar-format SAR pre-processing in a processor of a radar receiver device of motion-compensated phase history data for each said antenna channel; determining a location of a processed SAR image chip by converting track location and velocity into SAR image coordinates, wherein a size of said chip is proportional to a tracker error ellipse; compensating for defocusing due to target motion using an efficient one-dimensional moving reference processing (MRP) search over a single target defocus parameter expressed as a known function of said endo-clutter target and platform location, velocity, and acceleration; and performing space-time adaptive processing (STAP) on said SAR image chip using adaptive spatial antenna and temporal MRP degrees of freedom.