Real-time three-dimensional modular SAR preprocessor design

The architecture design for a high-speed front-end video prefiltering is de scribed, this being part of an effort to develop a realtime range-doppler d igital SAR processor to produce image maps of the scanned area immediately as raw data are collected. The evolved architecture consists of three-dimen sionally interconnected planes of modified transverse FIR parallel tapped e lements. Both the range and azimuth prefilterings are performed simultaneou sly in a continuous input-output flow without the need to consider corner t urning. The computation load has been reduced to one complex multiplication and two complex additions.