Title :
A novel propagation modeling for microcellular communications in urban environments
Author :
Jan, Shiun-Chi ; Jeng, Shyh-Kang
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
11/1/1997 12:00:00 AM
Abstract :
A novel method for microcellular communications to predict propagation characteristics is presented in this paper. It takes into account multiple reflections among walls, ground, vehicles, as well as the transmission/reflection due to groups of trees. Although these are three-dimensional (3-D) problems, we can combine two-dimensional (2-D) ray tracing and simple 3-D geometric considerations to solve them in a very efficient way. We have investigated the propagation loss versus size, number, and locations of vehicles and groups of trees on a safe island. Our results show that the radio wave propagation exhibits severe fast fading, attenuation, and blockage due to reflection, transmission, and shadowing, respectively
Keywords :
UHF radio propagation; cellular radio; electromagnetic wave reflection; fading; land mobile radio; ray tracing; 0.9 to 1.8 GHz; 2D ray tracing; 3D geometric considerations; attenuation; blockage; fast fading; ground; microcellular communications; multiple reflections; propagation loss; propagation modeling; radio wave propagation; shadowing; transmission; trees; urban environments; vehicles; walls; Attenuation; Fading; Land vehicles; Propagation losses; Ray tracing; Reflection; Road vehicles; Shadow mapping; Two dimensional displays; Vehicle safety;
Journal_Title :
Vehicular Technology, IEEE Transactions on
