To get the best performance for a broadband wireless access, this research aims to scale a Ku-band real-time rain attenuation data to higher frequencies and estimate the degree of fading that can be observed under such conditions. Data of simultaneous measurement of satellite radio beacons and rainfall parameters, carried out between January 2017 and December 2018, at Physics Department, Federal University of Technology (07.17°N, 05.18°E, 358 m) Akure, were used for the work. The radio beacon measurement, of horizontally polarized Eutelsat W4/W7 satellite signals at 12.245-GHz frequency, and received through a 90-cm parabolic antenna positioned at 53-deg elevation angle, was conducted at 1 s integration time using Tektronix Y400 NetTek spectrum analyzer. Measurement of rainfall parameters was done at 1-min sampling intervals using Davis Vantage Vue automatic weather station, which is co-located with the receiving antenna of the satellite receiver unit. Comparing measured and estimated attenuation values at 12.245 GHz for 1%, 0.1%, and 0.01% exceedance margins result in about 64%, 40%, and 55% relative error, respectively. Similarly, relative error values between estimated and scaled attenuation values for the same exceedance margins are 72%, 53%, and 27% for 16-GHz frequency, respectively, with similar values for the 20-, 30-, and 40-GHz frequencies as well. A power-law relationship between measured rain attenuation and rain rate was developed and used to generate a location-specific expression for computing rain attenuation. This was equally found to give better performance than the International Telecommunication Union model. The results obtained in this work provide useful information for radio engineers on the rain-induced attenuation needed for the design of radio communication system that can withstand poor weather conditions.

中文翻译：

---

尼日利亚阿库雷上空用于雨衰预测和无线电链路应用的 Ku 波段信号的频率缩放

为了获得宽带无线接入的最佳性能，本研究旨在将 Ku 波段的实时雨衰数据扩展到更高的频率，并估计在这种条件下可以观察到的衰落程度。这项工作使用了 2017 年 1 月至 2018 年 12 月在联邦理工大学物理系（07.17°N，05.18°E，358 m）阿库雷同时测量的卫星无线电信标和降雨参数的数据。使用 Tektronix Y400 NetTek 频谱分析仪以 1 秒的积分时间对 12.245 GHz 频率的水平极化 Eutelsat W4/W7 卫星信号进行无线电信标测量，并通过位于 53 度仰角的 90 厘米抛物面天线接收. 使用与卫星接收器单元的接收天线位于同一位置的 Davis Vantage Vue 自动气象站以 1 分钟的采样间隔测量降雨参数。比较在 12.245 GHz 时测量和估计的衰减值，超出裕度分别为 1%、0.1% 和 0.01%，分别导致大约 64%、40% 和 55% 的相对误差。同样，对于相同的超出裕度，估计衰减值和缩放衰减值之间的相对误差值对于 16-GHz 频率分别为 72%、53% 和 27%，对于 20-、30- 和 40-GHz 频率具有相似的值也是。开发了测量的雨衰和雨率之间的幂律关系，并用于生成计算雨衰的特定位置表达式。这同样被发现比国际电信联盟模型提供更好的性能。在这项工作中获得的结果为无线电工程师提供了有关设计能够承受恶劣天气条件的无线电通信系统所需的雨致衰减的有用信息。