A New Rain Attenuation Prediction Model for the Earth-Space Links

作者：Lu, Chang-Sheng; Zhao, Zhen-Wei; Wu, Zhen-Sen^*; Lin, Le-Ke; Thiennviboon, Phunsak; Zhang, Xin; Lv, Zhao-Feng

来源：IEEE Transactions on Antennas and Propagation, 2018, 66(10): 5432-5442.

DOI：10.1109/TAP.2018.2854181

• Earth-space links
• exponential rain cell profile
• rain attenuation prediction model
• rain rate adjustment factor
• satellite communications

In the Earth-space link communication system design, rain attenuation must be considered, especially with a frequency above 10 GHz. Therefore, a reliable rain attenuation prediction model is necessary for the design of these systems. Recently, two anomalous behaviors have been reported in existing rain attenuation prediction models. First, predicted rain attenuation results from many models vary nonmonotonically with elevation angles. Second, the rain attenuation predicted by the ITU-R model varies nonmonotonically with a percentage of time or rain rate in low latitudes (between 36 degrees S and 36 degrees N) and low elevation angles (below 25 degrees). To tackle these problems and improve the prediction accuracy, a new rain attenuation model is developed based on the exponential rain cell profile, and a concept of rain rate adjustment factor is proposed. Evaluating performance by utilizing the Recommendation ITU-R P.311-15, the new model provides better prediction results than other existing models. Moreover, the anomalous behaviors are also improved in this model.

• 出版日期2018-10
• 单位西安电子科技大学