论文标题
新兴毫米波蜂窝网络会对天气卫星造成有害干扰？
Will Emerging Millimeter-Wave Cellular Networks Cause Harmful Interference to Weather Satellites?
论文作者
论文摘要
我们研究了现实的5G毫米波细胞网络是否会导致23.8 GHz频段中的天气卫星感知的有害外部干扰。我们使用真实的3D构建数据和现实的天线模式来估算单个干扰物和干涉网络的上行链路和下行干扰。我们为Metop-B天气卫星的位置及其扫描方向以及用于代表性城市细胞位点的扫描方向以及地面干扰素天线取向进行详细的射线追踪传播模拟。除了-136 dBM/200 MHz的ITU -R阈值外，我们还提出了一组与卫星传感器灵敏度直接相关的有害干扰阈值。我们的结果表明，如果考虑ITU-R-R阈值，则3GPP功率泄漏极限足以确保单个5G设备的干扰不会有害，但如果天气预测软件仅能忍受非常低的干扰水平。重要的是，从具有现实网络密度的5G网络实践的总干扰通常是有害的，甚至考虑到最不保守的ITU-R阈值。总体而言，我们全面的共存研究强烈表明，对于保护天气卫星被动传感，需要其他工程和/或调节解决方案，以免受MM波细胞网络干扰。
We study whether realistic 5G mm-wave cellular networks would cause harmful out-of-band interference to weather satellites sensing in the 23.8 GHz band. We estimate uplink and downlink interference from a single interferer and a network of interferers in New York City, using real 3D building data and realistic antenna patterns. We perform detailed ray-tracing propagation simulations, for locations of the MetOp-B weather satellite and its scanning orientations and ground interferer antenna orientations for representative urban cell sites. In addition to the ITU-R threshold of -136 dBm/200 MHz, we propose an alternative set of harmful interference thresholds directly related to the sensitivity of the satellite sensor. Our results show that the 3GPP power leakage limits are sufficient to ensure that interference from a single 5G device is not harmful if considering the ITU-R threshold, but not if the weather prediction software can tolerate only very low interference levels. Importantly, aggregate interference resulting in practice from a 5G network with realistic network densities is often harmful, even considering the least conservative ITU-R threshold. Overall, our comprehensive coexistence study thus strongly suggests that additional engineering and/or regulatory solutions will be necessary to protect weather satellite passive sensing from mm-wave cellular network interference.
