室内带金属家具环境的电波传播特性研究.pdf

第2期
電る例就平執
Vol 9 No. 2
2014年4月
Journal of CAEIT
APr.2014
?程与施爿
doi:10.3969/j.issn.1673-5692.2014.02.018
室內带金属家具环境的电波传播特性硏究
殷福荣,王鹏飞,刘芫健
(南京娜电大学电子科学与工程学院,南京210003
摘要:射缄跟踪方法是研究室内复杂环境电波传播特性的有效技术。基于改进的入射及反弹射
线法和镜像法研究了宝内有全属家具的电波传播特性,仿真结果与已知文献测量结果对比,一致性
良好,证明了该方法在室内复杂环境预测电波传播特性的正确性和有效性。仿真结果表明:(1)视
距传(LOS)绕射对接收功率贡献很小,可以忽略;非视距范圆内(NLOS)绕射贡献较大,不可忽
略,三次反射对整个室内的接收功率影响都很小。(2)金属家具的存在导致了视距范国内接收功
率的刷烈波动,非视距范国内的接收功率波动不明显。(3)有金属家具房间的均方根时廷变化幅
度大。(4)到达角在空房间中近似于均匀分布,加入金属家具后,在视距范国内波动刷烈。(5)受
到达角的影响,多普勒烦移变化情况与到达角分布一致。分析结果为室内有金属家具环境的无线
通信系统设计提供了有效的理论依据
关键词:室内环境;金属家具;接收功率;绕射射线;到达角
中图分类号:TN92文献标识码:A文章编号:1673-5692(2014)02-209-08
Study on the Radio Wave Propagation in Indoor Environments
with Metallic furniture
YIN Fu-rong, WANG Peng-fei, IU Yuan-jian
College of Electronic science Eng neering, Nanjing University of Pts and Telecommumications, Nanjing 210003, Chin
Abstract: The ray tracing method is a practical approach to study the radio wave propagation in complex
indoor environments. An improved Shooting-and-bouncing Ray/Image(SBR/Image ) method is employed
to study the radio wave propagation charaeteristies. It is agreed well by a comparison of simulated results
and measured results, which validates he proposed method. The simulating results indicate that: (1)
The diffracted ray makes a small contribution to the received power and can he neglected in Line-of-sight
(T 0), however, it makes a greater contribution in Non-line-of-sight(N S)and cant be neglected
The trinal reflection path afects the received power little in whole room area.(2)The received power
fluctuates faster and stronger in IOS than in NIOS as the existence of melallic furniture. (3) The RMS
delay spread varies substantially in furnished room.(4) The arrival angle approximately follows the uni-
form distribution in empty room, however, it fluctuates violently in LOS of furnished room.(5) The
changes of Doppler shift consist with the distribution of arrival angle. The theoretical support can be pro-
vided by these results for the system design of wireless communication in indoor enviromments with metal
c furniture
Key words indoor environment metallic fumiture; received power diffracted ray direction of arrival
收稿日期:2013-11-24修订日期:2014-01-16
基金项目:国家自然科学基金项目(61372045);教育部高等学校博士点专项基金目(20123223120003)
万方数据