Through-the-wall imaging and, in general, imaging of buildings have received much interest in recent years. A major challenge relates to dielectric wall losses and wall distortion (including small-field penetration through multiple walls), leading to false interior imagery. Typically, UHF and L band 270frequencies are employed for radar imaging of building interiors. Thus, exact modeling approaches limit the generation of simulated datasets to guide the development of accurate imaging algorithms. This chapter presents high-frequency asymptotic methods, successfully used to carry out building imagery within the framework of the uniform geometrical theory of diffraction (UTD) [1,2] and by employing near-zone imaging.
