市区场景下700MHz,1.9GHz和2.6GHz频段路径损耗模型及对比分析

Path Loss Model and Comparative Analysis of 700MHz,1.9GHz and 2.6GHz Spectrum in the Urban Area

针对我国5G移动通信系统候选频段传播特性的研究,本文提出了一种用于大尺度电波传播特性测试的方法,并将该测试方法应用于我国实际市区场景下的测试工作中。通过后期数据处理,使用最小二乘法估计拟合出了700MHz、1.9GHz和2.6GHz等3个频段市区场景的大尺度的路径损耗曲线和公式,并与自由空间和ITU的相关建议书中的模型进行比较,证明了测试方案的合理性。测试表明,700MHz较1.9GHz和2.6GHz频段路径损耗小,传播范围更广,能够加强其覆盖能力,从而节省大量的网络建设费用和能源消耗。进一步说明,700MHz更适合用于移动通信系统,有利于5G移动通信系统在我国的部署。

In this paper,we propose a method for measuring the characteristics of the candidate frequency band of 5G mobile communication system.By studying the relevant literature,we propose a method to test the large scale wave propagation characteristics.The test method is applied to the test work in the actual urban area.Through data processing,using the least square method to estimate the curve and formula of path loss of 700MHz1.9GHz and 2.6GHz spectrum,and compared with the model of free space and ITU-R.The rationality of the test scheme is proved.Tests show that the 700 MHz and 2.6GHz band path loss is small,the transmission range is wider,which can strengthen the coverage ability,thus saving a lot of network construction cost and energy consumption.Further,700 MHz is more suitable for mobile communication system,which is conducive to the deployment of 5G mobile communication system in China.