Investigation of propagation characteristics above 1 GHz for microcellular land mobile radio

Abstract

Experimental and calculated results of propagation characteristics above 1 GHz for microcellular land mobile radio in an urban area are described. Measurements were made at 1.5 GHz and 2.6 GHz with a fixed antenna located at the side of the road at a height of 5.3 m. Data were taken with an omnidirectional antenna at 2 cm intervals along the measured routes. Tall buildings line the measured routes on both sides. According to the experimental and calculated results, the propagation loss is dominated by interference among the direct ray and specularly, building-reflected and mobile-reflected rays in the line-of-sight propagation environment, and by interference between specular rays and building-diffracted rays in shadowed propagation. Therefore, in line-of-sight propagation, the median of propagation loss is similar to the free-space loss. In shadowed propagation, however, the median is not determined only by the base-to-mobile antenna distance.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>