Near-field 2-D and 3-D radar imaging using a chirp scaling algorithm

A new chirp scaling algorithm (CSA) has been formulated and tested. This method yields more accurate results when applied to configurations with high coherent integration angles and high bandwidth-to-center-frequency ratios than the original CSA. Moreover, it has been extended to the three-dimensional case when a planar synthetic aperture is employed. The formulation of the new method is justified in this work. In addition, an algorithm version adapted to stepped-frequency radars has been developed. Finally, this technique is implemented and successfully tested with numerical simulations and real data obtained with a ground-based system.