WiMAX通信におけるランダム森林媒質中のマイクロ波伝搬?散乱特性のFDTD解析

摘要

本研究ではWiMAX通信路として，森林におけるマイクrn口波の伝搬?散乱特性をFDTD法により示した。rn入射波はガウスビーム波とし，20[m]伝搬後の減衰量を数rn値計算によって求めている。森林は，高さの2乗平均平方rn根および相関長を与えて生成したランダム表面としてモデrnル化した。%WiMAX wireless communication has been rapidly developed for broadband mobile communication. To design excellent high performance mobile communication systems, accurate evaluation of communication systems is indispensable. In the past, building and street effects on high speed signal propagation were studied by FDTD method. However, wave propagation and scattering characteristics by presence of forest and trees are not so much studied. In this paper, the effects of multiple scattering and attenuation of microwaves over forests in WiMAX wireless communications are analyzed numerically using FDTD method. These results may yield important factors for design of high performance and reliable WiMAX communication systems.