Propagation Models Research In Third-generation Mobile Communication Systems

A propagation model for 3G communication systems is considered in this paper. The analysis method is based on high frequency ray-tracing,the uniform theory of diffraction,Geometrical Optics(GO), Uniform Geometrical Theory of Diffraction(GTD)。The ray contributions includes diffraction from building edges, reflection from the ground and building and the direct wave. We analyzed propagation characteristics in 3G communication systems using the above analysis method. The dependency of radio wave propagation with the geometry of the scenario and the frequency band is investigated in detail. The numerical results can be applied in cell planning of new cellular systems.In this paper, we establish the radio propagation characteristics for 3G radio environments。In a typical cellular system such as 3G, the signal level at a given position can be predicted by analyzing the propagation characteristics of the channel. Results are very much dependant upon location and evironment. Thus, the information of the propagation characteristics of the radio channel is useful in cell planning of a cellular system. From the standpoint of services for future 3G systems, and considering backward compatibility with 3G systems, it would be desirable for the former to also have cellular network characteristics.The main purpose of this paper is to provide accurate results for cell planning based on the actual propagation phenomena. This would help to find...