Advanced LOS path loss model in microwave mobile communications

An advanced LOS (line-of-sight) path loss model with the characteristics of a real urban environment is proposed. Good results are obtained by using a two-path model together with shadowing caused by obstacles that would appear in an actual urban environment and rising reflection points caused by vehicular traffic. By applying the model in the urban environment, microcellular path loss can be predicted from the UHF to microwave bands. Measurements were performed using two different frequencies (457.2 MHz and 10.7 GHz) and two different BS antenna heights (3 m and 24 m).