ABSTRACT
The introduction of the synthetic aperture radar concept in the 1950s represented a significant advancement in radar technology. The interest in through-the-wall radar technologies, where a major goal is detecting, identifying, and tracking humans enclosed in building structures, has recently prompted a number of studies on the radar signature of the human body. In terms of image formation algorithms, the authors consider two commonly used techniques: the polar format algorithm and the back projection algorithm. Parallel to the radar measurements, they simulate the same building imaging scenario using Xpatch. There were significant differences between the model and the measurements, particularly in terms of the illumination and scattering geometry and the image formation algorithms. Three-dimensional radar images of a scene can be obtained by employing a 2D imaging aperture. The aperture can be physical or synthetic in one or both dimensions, with monostatic or multistatic configurations.
