室内电波传播特性的FDTD法分析  

Characteristic Analysis of Indoor Radio Wave Propagation by FDTD Method

作　　者：季飞[1] 黄秀轩[1] 陈芳炯[1] 朱一成[1] 

机构地区：[1]华南理工大学电子与信息学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2004年第4期1-4,共4页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目 (6 0 10 10 0 2 );华南理工大学高水平大学建设项目 (30 3D76 0 30 )

摘　　要：采用二维时域有限差分 (FDTD)法分析了在家具存在情况下无线局域网IEEE80 2 .11b的一个重要工作频段 (2 .4GHz左右 )的室内电波传播特性 .探讨了发射信号为2 .4GHz的连续波时接收信号功率随距离的分布和累积分布概率 ;分析了发射信号为宽频带的脉冲波时 ,在视距传输和非视距传输情况下的接收信号的时延 .仿真结果表明 ,由于家具对电波的严重散射 ,在有家具情况下 ,信号功率高于平均值出现的概率小于无家具情况 .The propagation characteristics of the indoor radio wave with an important frequency of about 2.4 GHz in the radio intranet of IEEE 802.11b were analyzed by the two-dimension FDTD (finite-different time-domain)method. The cumulative distribution probability and the power distribution of the received signal with the propagation distance were also given for the exciting source of 2.4 GHz continuous wave. The time-delays of the received signal for the line-of-sight and the non-line-of-sight scenarios with the impulse wave as the exciting source were then analyzed. The simulation results show that, because of the serious dispersion, the probability that the received signal power is higher than the average one when there is indoor furniture, is proved to be lower than when there is no furniture.

关 键 词：时域有限差分法 电波传播特性 累积分布概率 

分 类 号：TN81[电子电信—信息与通信工程]