Validations have been performed comparing Wireless InSite^® to the full-wave Finite Difference Time Domain (FDTD) method. These comparisons show Wireless InSite provides accurate time delay and delay spread.

In pdf format below is an article by Joseph W. Schuster and Raymond J. Luebbers entitiled "FDTD Techniques for Evaluating the Accuracy of Ray Tracing Propagation Models for Microcells" from the 16th Annual Review of Progress in Applied Computational Electromagnetics at the Naval Postgraduate School, Monterey, California, March 20-24, 2000.

Abstract

In this paper several techniques are presented for employing a two-dimensional FDTD simulation as a tool for evaluating the accuracy of radio wave propagation models based on high-frequency asymptotic methods. In particular, comparisons are made to a GTD based method in the frequency and time domains. The GTD results are calculated using the Uniform Theory of Diffraction (UTD) wedge diffraction coefficients modified for finite conductivity. Because the 2D FDTD fields spread as cylindrical waves emitted from a line source, a simple technique is introduced for modifying the 2D FDTD time domain response to approximate the spherical wave spreading of fields emitted from a point source. 

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