Computational accuracy and speed of some knife-edge diffraction models

In this paper we compare the computational accuracy and speed of some knife-edge diffraction models. The Bullington, Epstein-Peterson, Deygout, and Giovaneli models were implemented in MATLAB and compared to the rigorous Vogler method. It is found that all these methods, except the Bullington method, are of similar accuracy. The computational efficiency, on the other hand, is quite different for these four methods. These results provide important guidance for the applications of these knife-edge models in practical simulations of radio propagation.