engleski

Ray-tracing Study of Visibility Region Size in Urban Environment

The analysis of dynamics of change for multipath components along a route in urban environment is performed, in order to determine the size of visibility regions for multipath components. The analysis was performed using 3D ray tracing tool that calculated the direction of arrival, the length of each multipath component, as well as the power level for each ray. It was surprisingly observed that the size of visibility regions for most rays was at the level of one meter or less, so additional investigation is performed at this smaller scale. Shortness of visibility regions is discussed and explained through the nature of diffraction, which was dominant propagation mechanism in this investigation.

channel model ; stochastic channel model ; deterministic channel model ; ray tracing

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