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A Novel Joint Prediction Model of Atmospheric Attenuation for Co-Frequency Interference Analysis Between LEO Constellations

Many low earth orbit (LEO) constellation systems sharing the same spectrum have been proposed in recent years, co-channel interference has become one of the main factors that limit system performance. For a more accurate interference prediction, it is necessary to consider the combined effect of different propagation impairments in the interference analysis between LEO constellation systems. In this paper, we propose a novel joint prediction model, which takes into account the total atmospheric attenuation and the resulting system noise tem-perature increment. Furthermore, the joint prediction model is applied for the interference analysis of LEO constellation systems in the downlink direction. Simulation results show that the pro-posed joint prediction model outperforms the existing attenuation prediction models. More accurate interference prediction results can be obtained by applying this model. In addition, numerical results indicate that the severe atmospheric attenuation has a signficant influence on the interference prediction results.