高速铁路的GSM-R无线传播模型校正

摘要

为了提高在铁路沿线复杂地形环境下的Hata模型准确度,在研究GSM-R系统中的电波传播预测Hata模型的基础上,提出了一种对Hata传播模型的校正方法.结合郑西实测线路数据对市郊、平原和山区三种地形环境下进行校正,得到了不同地形下的Hata校正模型.通过对校正前后模型的误差对比,校正后的Hata传播模型准确度有显著提高.%To improve the Hata propagation model's accuracy in complicated environment of high speed railway, the Hata model in GSM - R is investigated, and an adjustment method is proposed. With the measured data of GSM-R network in Zhengzhou - Xi'an high speed railway, the wireless path loss in four different terrains of suburban, plain and mountain is computed and modeled, and an adjusted Hata model is achieved. By comparing the deviations of pre-and post - adjustment, it shows that the prediction accuracy of adjusted Hata model has been improved obviously.