Ray Tracing Method Based On Simplicse For Calculating Electric Field Intensity In Indoor Environments

Ray tracing method can be widely used to predict the raido wave propagation in the environment of mobile communications and personal communications. Based on theory of geometry optics, line of sight ray and reflect ray are considered, ray tracing is an easy approximate method estimating high frequency electromagnetic field. As for diffract ray tracing, the GTD and UTD theory are introduced to complement theory of geometrical optics. At present, with the rapid increase of wireless mobile communication, the ray tracing method which predicts the radio wave accurately reflects the superiority.The main contents and contributions of this thesis are as follows:(1)A ray tracing method based on simplices is developed and explored. In the implementation, the environment is divided into tetrahedrons. This ray tracing method can be used to3D environment and more complex environment. Simplex ray tracing method and the advantages and disadvantages of other ray tracing method are studied.(2)A new wavefront division method and the improved receiving criterion are presented. New wavefront divison method makes the neighbour rays more uniform, improved receiving criterion is used to solve the shorcomings of double counting error.(3)This algorithm is implemented by Matlab language. The data analysis which combined with related literature on a particular indoor environment simulation is made. The receiver electric field intensity distribution which combined with new wavefront diving and improved receiving criterion is calculated. The calculated results are in good accord with the literature, so as to prove the availability and correctness of the proposed approach.