Effective models in evaluating radio coverage on single floors of multifloor buildings

An effective site-specific hybrid model is developed to predict the path lo ss and the effective radio coverage on single floors, The hybrid model, com bined with a two-dimensional (2-D) model and an easy-to-use direct-transmit ted ray (DTR) model, is incorporated with the building blueprint in usage, Both effects of the interior walls and the metallic objects such as whitebo ards, bookcases, and standing air conditioners on radio propagation are con sidered. It is found that inclusion of metallic objects will enhance the pe rformance of the model.