具有行人影响的11 GHz室内无线信道建模与特性分析

Modeling and Characteristics Analysis of Indoor Wireless Channel at 11 GHz with Pedestrian Influence

为了研究高频段宽带短距离无线通信的信道传播特性,对11 GHz频段在不同室内场景下的无线传播特性进行了分析。利用大量实测数据建立了考虑行人影响因素的路径损耗模型,并给出了均方根时延扩展的统计特性。此外,对走廊、空房间和大型会议室这3种场景中行人因素对信道传播特性的影响进行了比较和分析。研究结果显示,当行人在收发端间移动时,其遮挡衰减路径损耗与距发送端的距离呈二次函数关系;当行人静止不动时,其遮挡衰减路径损耗与距接收端的距离呈指数函数关系;不同场景中行人对路径损耗的影响程度不同;此外,行人因素还会增强收发端间的多径效应。以上研究结果可为未来高频段室内短距离无线通信提供理论和实践依据。

To study the channel propagation characteristics of high frequency broadband short range wireless communication,the wireless propagation characteristics of different indoor scenarios at 11 GHz are measured.Based on a large amount of data,a path loss(PL)model with pedestrian factors is established,and the statistical characteristic of root mean square delay is presented.In addition,the influences of pedestrian factors on channel propagation characteristics in corridor,classroom and large conference room are compared and analyzed.The research results show that when the pedestrian moves between the transmitter and receiver,the PL caused by pedestrian blocking factors has a quadratic function relationship with the distance between the pedestrian and transmitter.When the pedestrian is stationary,the PL caused by passer-by is an exponential function of their distance from the receiving end.Moreover,the impact of pedestrian on path loss varies in different scenarios,and the pedestrian factors also enhance the multipath effects.The above research results can provide theoretical and practical basis for the application of high-frequency indoor short-distance wireless communication in the future.