Three-dimensional geometrical optics code for indoor propagation

This paper presents program GO_3D for computing the fields of a transmitter in an indoor environment using geometrical optics. The program uses an image tree data structure to construct the images needed to compute all the rays carrying fields above a preset threshold value, no matter how many reflections are needed. The paper briefly describes the input file required to define wall construction, the floor plan, the transmitter, and the receiver locations. A case study consisting of a long corridor with a small room on one side is used to demonstrate the features of the GO_3D program.