论文标题
汇率分配多个访问下一代认知无线电启用LEO卫星网络
Rate Splitting Multiple Access for Next Generation Cognitive Radio Enabled LEO Satellite Networks
论文作者
论文摘要
本文建议使用GEO SATCOM网络共存的RSMA无线电访问技术来认知无线电启用LEO SATCOM。特别是，这项工作旨在通过同时在不同的梁上优化功率预算，为每个梁上的用户分配RSMA功率分配以及子载波用户分配，同时将干扰温度限制为GEO SATCOM。总和最大化的问题被提出为非凸，其中全局最佳解决方案要获得挑战。因此，可以分为三个步骤获得有效的解决方案：首先，我们采用连续的凸近似技术来降低复杂性并使问题更容易处理。其次，对于任何给定的资源块用户分配，我们采用KKT条件来计算每个光束上用户对用户分配的发射功率。第三，使用分配的功率，我们根据资源块用户分配的贪婪方法设计了一种有效的算法。数值结果证明了与基准方案相比，提出的优化方案的好处。
This paper proposes a cognitive radio enabled LEO SatCom using RSMA radio access technique with the coexistence of GEO SatCom network. In particular, this work aims to maximize the sum rate of LEO SatCom by simultaneously optimizing the power budget over different beams, RSMA power allocation for users over each beam, and subcarrier user assignment while restricting the interference temperature to GEO SatCom. The problem of sum rate maximization is formulated as non-convex, where the global optimal solution is challenging to obtain. Thus, an efficient solution can be obtained in three steps: first we employ a successive convex approximation technique to reduce the complexity and make the problem more tractable. Second, for any given resource block user assignment, we adopt KKT conditions to calculate the transmit power over different beams and RSMA power allocation of users over each beam. Third, using the allocated power, we design an efficient algorithm based on the greedy approach for resource block user assignment. Numerical results demonstrate the benefits of the proposed optimization scheme compared to the benchmark schemes.
