Abstract
Path loss is the attenuation in the power density of an electromagnetic wave when it propagates over regular or irregular terrain. Path loss data measurement and propagation model design 1s one of the most important factors in wireless communication . The theoretical propagation model is not sufficient to predict the effect of all obstacles such as forest, mountain, weather, building, and other environmental factors to the radio wave propagation. Moreover, every day weather, surroundings, and geographical structures change, so the same theoretical model may not be sufficient to predict the radio wave propagation over and over. This project is a real-time path loss data measurement for one of the major wireless companies in the United States. Cellular (GSM850) and PCS (PCS1900) frequency bands from AT&T were used in the measurement process. The hardware and software used in this project allow anyone to accurately measure path loss RF data in any part of the world.