3D tetrahedron ray tracing algorithm

A new three-dimensional (3D) tetrahedron meshed ray tracing (TMRT) method is proposed. It is based on dividing the propagation region into tetrahedral cells whereby the number of tetrahedrons is decided by the number of vertices of structures instead of their dimensions. This method represents a 3D extension to the 2D procedure described in an earlier paper. Results from the 3D TMRT method show significant improvement in computational efficiency and are typically less than one half of those of the visibility ray tracing approach. These results were illustrated by calculating the delay spread in a typical indoor propagation environment