A method of path loss prediction based on computer graphics technologies

In this letter, a method for path loss prediction in outdoor urban environments based on computer graphics technologies is presented. Each wall of buildings in an evaluation area is assigned to a different RGB color. We create two types of color images that are viewed from a transmission point (Tx) and receiving points (Rxs). By analyzing and comparing the colors of these images, the visible colors existed in both images corresponding to the single scattering walls are detected all at once. The numbers of pixels of the visible colors are used to calculate received powers of the single scattering waves. The average and RMSE of difference between predicted path loss results and measurement results are small with -0.5dB and 7.6dB, respectively. The computation time is extremely short.