Resolution in radar mapping
Anderson, Michael D.
Gill, Gurnam Singh
Jenn, David C.
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Signal processing has led to great performance gains in radar mapping. The most critical feature of these systems is cell size, which determines resolution. Cell size in defined by range resolution and azimuth resolution. Range resolution is improved through pulse compression. Phase or frequency modulation of a waveform yields increased bandwidth and shorter effective pulse width without reducing total signal energy. Several families of codes are investigate emphasizing matched filter output and Doppler tolerance. Azimuth resolution is improved through beam sharpening. Several beam sharpening techniques are illustrated with radar images provided by Hughes Aircraft. Range bin output plots demonstrate the effectiveness of these techniques. With these techniques, "near-SAR" quality output can be obtained from real beam mapping radars allowing the real-time and all aspect capabilities of real beam systems to be more fully employed in tactical missions.
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