校园无线信道衰减特性研究

Research on the Attenuation Characteristics of Campus Wireless Channel

目前针对无线传播特性在机载方面的研究相对较少。为研究校园特定场景信道特性,对校园宽阔地带与树木茂盛地带两种场景进行实地测量并采集数据。不同场景的信道衰减不同,采用参数估计方法,使用最小二乘法对路径损耗因子以及原点处路径损耗进行估计,从而实现两种场景下无线信道建模。经过实验可得校园宽阔地带路径损耗因子为2.664,有树木遮挡的林荫道场景路径损耗为2.812。实验结果表明,两种场景下的大尺度信道衰落模型可以很好地反映机载天线无线传播特性。

At present,there are a limited number of researches on airborne wireless propagation characteristics.In order to study the channel characteristics of campus specific scenes,two scenes of campus wide area and wooded area are measured and collected.The channel attenuation in different scenarios is different.The parameter estimation method is used to estimate the path loss factor and the path loss at the origin by using the least square method.The results show that the path loss factor of the campus wide area is 2.664,and the path loss of the tree sheltered avenue scene is 2.812.The experimental results show that the large-scale channel fading models in the two scenarios can well reflect the wireless propagation characteristics of airborne antennas.