室内办公室场景10 GHz频段传播特性研究

Propagation characteristics of 10 GHz band in indoor office scenario

为了探索高频段宽带短距离无线通信的可行性,测量了10 GHz频段室内办公室场景的无线传播特性。基于大量的实测数据,分别建立了室内视距(Line⁃of⁃Sight,LOS)和非视距(Non⁃Line⁃of⁃Sight,NLOS)两种场景的路径损耗模型,并给出了阴影效应X_(σ)的统计特性。通过对测量频率响应傅里叶反变换得到冲击响应的功率延迟谱,从而给出了时域均方根时延扩展的统计特性。研究表明在室内LOS场景下,路损与收发端对数距离具有线性关系;在NLOS场景下,遮挡物相对接收端位置发生变化对路径损耗有着重要的影响:当遮挡物静止时,遮挡衰减因子(Shielding Attenuation Factor,SAF)与接收端到遮挡物的距离具有指数函数关系;当遮挡物移动时,SAF与遮挡物到接收端的距离具有线性关系。上述研究结果可为未来高频段室内短距离无线通信的使用提供理论与实践依据。

To explore the feasibility of high⁃band broadband wireless communication,the short⁃distance wireless propagation characteristics in the indoor office scenario at 10 GHz band are measured.Based on the actual measured data in indoor line⁃of⁃sight(LOS)and non⁃line⁃of⁃sight(NLOS)scenarios,path loss models are established and the statistical characteristics of shadow effects are given.The power delay spectrum of the impulse response is obtained by the inverse Fourier transform of the measured frequency response,and the statistical characteristics of the time⁃domain root⁃mean⁃square delay spread are presen⁃ted.Research results show that the path loss has a linear relationship with the logarithmic distance of the transceiver in the LOS scenario.In the NLOS scenario,the change of the position of the shield relative to the receiving end has an important impact on the path loss,that is,when the shield is stationary,the shielding attenuation factor(SAF)is exponentially related to the distance from the receiving end to the shield.When the shield moves,the SAF is linearly related to the distance from the shield to the receiving end.The above research results can provide a theoretical and practical basis for the high⁃frequency indoor short⁃range wireless communication in the future.