Ultra-Wideband Coherent Processing

VOLUME 10, NUMBER 2, 1997 THE LINCOLN LABORATORY JOURNAL 203 L    played a major role in developing wideband radar systems. This development was motivated by the successful application of high-power instrumentation radars to research in ballistic missile defense and satellite surveillance. Today’s wideband imaging radars perform real-time discrimination and target identification. Advanced signal processing methods have improved the resolution of processed radar return signals, further improving wideband-radar technology. Figure 1 illustrates a ballistic missile defense environment that relies on accurate target identification and size-shape estimation, two capabilities critical to many areas of national defense. The primary goal of a defensive radar system is to intercept and destroy a threat target. This objective is complicated by the presence of many objects in the radar field of view, some purposefully designed to deceive radar discrimination algorithms. Decoys, for example, may have radar cross section (RCS) levels similar to those of the warhead, which makes robust target selection based solely on RCS levels difficult. Narrowband radars Ultra-Wideband Coherent Processing

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