摘要
受限区域的空间小、形状不规则,传播环境相对复杂,研究无线信号在受限区域内的传播特性可以有效的提升无线通信质量。无线信号传播特性测量在受限区域场景(办公室和楼梯)进行,重点分析了无线信道的路径损耗和多径效应。首先,针对办公室场景提出了一种依赖于天线高度的衰减因子模型。为了模拟天线高度对路径损耗的影响,引入了高度损失因子(HLF)模型。其次,为了研究办公室和楼梯场景的多径效应,提出了抽头延迟(TDL)模型。实验结果表明抽头延迟模型分布与Nakagami分布相似,办公室的m参数和抽头数量小于楼梯,表明窄带结构的波导效应比开放式办公环境更明显。研究结果为无线通信过程中的链路预算、覆盖预测和干扰分析提供了有效的理论和实践依据。
Due to the small radius and irregular shape of the limited area,the propagation environment is extremely complex,it is urgent to study the propagation characteristics of wireless channel during the limited complex area. In this paper,the propagation characteristic measurement was carried out during the limited area scene( office and staircase). The path loss and multipath effect of wireless channel were analyzed. Firstly,an antenna-dependent attenuation factor model was proposed for office scenarios. In order to simulate the height change of the antenna effect on path loss,height loss factor( HLF) was introduced. Secondly,tapped delay line( TDL) model was proposed for studying the multi-path effect in the office and staircase scene. The results showed that the amplitude of model taps was similar to the Nakagami distribution,and the m parameter of each tap was greater than 1. The m parameter and tap numbers of staircase was significantly larger than office,indicating that the waveguide effect of narrow structure of the stairs was more significant than open office environment. The wireless propagation characteristics and channel model studied in this paper provided effective theoretical basis and practical basis for link budget,coverage prediction and interference analysis of wireless communication during the limited complex area.
出处
《电子测量与仪器学报》
CSCD
北大核心
2018年第9期48-54,共7页
Journal of Electronic Measurement and Instrumentation
基金
国家杰出青年科学基金(50925727)
国家重点研发计划“重大科学仪器设备开发”(2016YFF0102200)
国家自然科学基金重点项目(51637004)、国家自然科学基金(51577046)资助项目
装备预先研究重点项目(41402040301)
关键词
短距离无线通信
路径损耗
多径效应
信道矩阵
limited area
short distance wireless channel
path loss
multipath effect
channel matrix
