Searching Shortest Path of Two-Ray Model by PSO Algorithm

Two-ray model is the basic line-of-sight propagation model for radio-wave propagation. Fermat´s principle of Geometrical optics theory shows that the optical ray path is the minimum distance, which can make the propagation problem of radio-wave into the optimization problem of path function. Particle Swarm Optimization (PSO) with the characteristic of better searching optimization, was used to calculate reflected-ray path of two-ray model. The numerical results are consistent with the refection law, which indicates PSO algorithm is efficient to solve the multi-path propagation.