High range resolution capability provides many advantages in radar but it requires large bandwidth systems. However with step frequency radars it is possible to achieve high resolution of wideband systems with many of the advantages of narrow band systems. In this paper ambiguity function is employed to study step frequency radar. The mathematical expression is derived for the ambiguity function of step frequency radar receiver and processor. The processor functions included are range gating, weighting, fill pulses and inverse discrete Fourier transform. Ambiguity diagrams are plotted for step frequency receiver processor and comparison is made with traditional constant frequency radar.
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