WiMAX 無線通信における森林上のマイクロ波伝搬・散乱特性のFDTD法解析

摘要

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 riot 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.%広帯域移動通信において，OFDMを用いたWIMAX無線通信は急速に発展している.優れた高性能無線通信システムを設計するにあたり，通倍チャンネルの正確な評価が不可欠である.建物および道路におけるマイクロ波の伝搬・散乱特性解析は行われているが，森林における散乱特性についてはあまり検討されていない.本研究では，解析領域にランダムな森林モデルを与え，WiMAX無線通信の森林におけるマイクロ波の伝搬・散乱特性をFDTD法正より示す.