Propagation loss prediction models for land mobile communications

Propagation loss prediction models play a very important role in the design of cellular mobile radio communication systems by specifying the key system parameters such as transmission power and frequency reuse. Several prediction models have been proposed for cellular mobile radio systems operating in the quasi-microwave frequency band. Some of them were derived in a statistical manner based on measurement data, while the others were derived analytically by considering diffraction effects. Each model uses specific parameters to achieve reasonable prediction accuracy. This paper summarizes propagation loss prediction models used in land mobile communication system design, and discusses their applicability to various mobile propagation environments. It is also considered that the propagation characteristics in microwave and higher frequency bands are now necessary for multimedia mobile communication systems