Developing a method of moments based indoor propagation model

This paper presents initial efforts to develop a full-wave propagation model for indoor electromagnetic wave propagation based on the Volume Electric Field Integral Equation which when discretised by the Method of Moments results in a linear system whose iterative solution can be expedited through use of the FFT. Although the formulation requires the discretisation of the entire volume, only unknowns placed in the scattering material (walls, etc) contribute to the scattered field. Consequently, unknowns placed in free space can effectively be removed from the update process in each iteration leading to rapid convergence. The model is validated against the Uniform Theory of Diffraction. Its computational efficiency and accuracy are compared with an alternate integral equation, the Surface Electric Field Integral Equation discretised by the Method of Moments and accelerated by the ML-FAFFA. Results demonstrating the propagation modelling capabilities of the model are demonstrated alongside a motivating example for the use of full-wave models over conventional approximate methods like ray tracing.