Simulation of indoor UHF propagation using numerical technique

Indoor wireless communication system performance predictions are still difficult to make because of the difficulty associated with a full understanding of how radio waves behave in complicated channels. Several techniques are available to simulate the indoor propagation channel, such as statistical methods or ray tracing methods, they are inspired from their application to characterize mobile radio channels. Nowadays, with the advent of supercomputers, various numerical methods emerged as powerful tools for studying practical indoor propagation problems. This paper reports on a deterministic model developed on the basis of the finite-difference time-domain (FDTD) technique, using the equivalence principle to simulate the base station antenna radiation pattern. The proposed method is validated in a complex room for an indoor radio channel operating at the UHF band, and provides interesting prediction results.