Real-time three-dimensional modular SAR preprocessor design

Abstract

The architecture design for a high-speed front-end video prefiltering is described, this being part of an effort to develop a real-time range-doppler digital SAR processor to produce image maps of the scanned area immediately as raw data are collected. The evolved architecture consists of three-dimensionally interconnected planes of modified transverse FIR parallel tapped elements. Both the range and azimuth prefilterings are performed simultaneously in a continuous input-output flow without the need to consider corner turning. The computation load has been reduced to one complex multiplication and two complex additions.