Recently, to make the best use of limited and precious spectrum resources, spectrum sharing between satellite and cellular networks has received much interest. In this study, we mathematically analyze the success probability of a fixed (satellite) earth station (FES) based on a stochastic geometry framework. Both the FES and base stations (BSs) are assumed to be equipped with a directional antenna, and the location and the number of BSs are modeled based on the Poisson point process. Furthermore, an exclusion zone is considered, in which the BSs are prohibited from locating in a circular zone with a certain radius around the FES to protect it from severe interference from the cellular BSs. We validate the analytical results on the success probability of the cognitive satellite‐terrestrial network with directional antennas by comparing it using extensive computer simulations and show the effect of the exclusion zone on the success probability at the FES. It is shown that the exclusion zone‐based interference mitigation technique significantly improves the success probability as the exclusion zone increases.

中文翻译：

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带定向天线的卫星和地面频谱共享网络的性能分析

最近，为了充分利用有限和宝贵的频谱资源，卫星和蜂窝网络之间的频谱共享引起了人们的极大兴趣。在这项研究中，我们基于随机几何框架数学分析固定（卫星）地球站（FES）的成功概率。假设FES和基站（BS）都装有定向天线，并且基于Poisson点过程对BS的位置和数量进行建模。此外，考虑了禁区，在禁区中，BS被禁止位于围绕FES具有一定半径的圆形区域中，以保护其免受来自蜂窝BS的严重干扰。我们验证关于认知成功概率的分析结果通过使用广泛的计算机仿真比较具有定向天线的卫星地面网络，并展示了禁区对FES成功概率的影响。结果表明，随着禁区的增加，基于禁区的干扰缓解技术显着提高了成功率。