Radar interference into LTE base stations in the 3.5 GHz band
Radar interference into LTE base stations in the 3.5 GHz band
复制标题
3.5 GHz 频段的雷达对 LTE 基站的干扰
DOI：
10.1016/j.phycom.2016.04.005
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
T. Clancy
中科院分区：
文献类型：
--
作者：
M. Ghorbanzadeh;E. Visotsky;P. Moorut;T. Clancy
我们研究的干扰，从一个旋转的舰载雷达系统，频谱和空间上共存的长期演进（LTE）蜂窝通信网络在3.5 GHz频段的调查LTE部署在美国沿海大城市在该频段的可行性。首先，我们模拟的雷达系统与现实的操作参数。此外，我们利用详细的3GPP兼容的LTE仿真与复杂的空中接口建模，并调查LTE在宏小区，室外小小区和室内小小区场景中对雷达干扰的敏感性。我们采用美国国家电信和信息管理局（NTIA）常用的自由空间路径损耗和不规则地形模型来模拟雷达和LTE系统之间的传播条件，以考虑雷达脉冲在到达LTE系统之前所经历的传播、衍射和对流层散射损耗。作为一个性能指标，我们评估的吞吐量的LTE系统在上行链路方向的雷达和蜂窝系统之间的各种距离。我们的仿真结果表明，即使在严重的干扰条件下，LTE链路仍将保持运行。事实上，距离雷达100 km的LTE系统经历LTE总吞吐量的小于10%的吞吐量损失，并且当雷达距离LTE仅50 km时，吞吐量损失小于30%。
We study the interference from a rotating shipborne radar system that spectrally and spatially coexists with a Long Term Evolution (LTE) cellular communications network in the 3.5 GHz band to investigate the feasibility of LTE deployment in the United States coastal metropolitan cities in that band. First, we simulate the radar systems with realistic operational parameters. Furthermore, we leverage a detailed 3GPP-compliant LTE simulation with a sophisticated air interface modeling and investigate sensitivity of LTE to radar interference in macro cell, outdoor small cell, and indoor small cell scenarios. We simulate the propagation conditions between the radar and LTE system by adopting the Free Space Path Loss and Irregular Terrain Model commonly leveraged by National Telecommunications and Information Administration (NTIA), to account for propagation, diffraction, and troposcatter losses that the radar pulses undergo before they reach the LTE system. As a performance metric, we evaluate the throughput of the LTE system in the uplink direction for various distances between the radar and the cellular system. Our simulation results indicate an LTE link will remain operational even in severe interference conditions. In fact, the LTE system as close as 100 km away from the radar undergoes less than 10% throughput loss from the LTE total throughput, and the throughput loss is less than 30% when the radar is only 50 km away from the LTE.