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arXiv 2104.13010cs.ITeess.SPmath.IT
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Shadowed-Rician衰落下卫星通信系统性能的随机几何分析

Performance Analysis of Satellite Communication System Under the Shadowed-Rician Fading: A Stochastic Geometry Approach

Dong-Hyun Jung, Joon-Gyu Ryu, Woo-Jin Byun, Junil Choi

摘要:

在本文中,我们考虑下行链路低地球轨道(LEO)卫星通信系统中,多个LEO卫星均匀分布在一个球体在一定的高度,根据齐次二项式点过程(BPP)。根据BPP的特点,分析了BPP的距离分布和服务卫星的分布情况。我们解析地推导出精确的中断概率,并利用泊松极限定理得到其近似表达式。利用这些推导的表达式,系统吞吐量最大化问题下的卫星可见性和中断约束。为了解决这个问题,我们重新制定了有界可行集,并提出了一个迭代算法,以获得近最优解。仿真结果完全符合推导出的中断概率和系统吞吐量的精确表达式。近似表达式的解析结果与精确表达式的解析结果相当接近。它还表明,所提出的算法的吞吐量最大化是非常接近的最佳性能得到一个二维穷举搜索。

英文摘要:

In this paper, we consider downlink low Earth orbit (LEO) satellite communication systems where multiple LEO satellites are uniformly distributed over a sphere at a certain altitude according to a homogeneous binomial point process (BPP). Based on the characteristics of the BPP, we analyze the distance distributions and the distribution cases for the serving satellite. We analytically derive the exact outage probability, and its approximated expression is obtained using the Poisson limit theorem. With these derived expressions, the system throughput maximization problem is formulated under the satellite-visibility and outage constraints. To solve this problem, we reformulate it with bounded feasible sets and propose an iterative algorithm to obtain near-optimal solutions. Simulation results perfectly match the derived exact expressions for the outage probability and system throughput. The analytical results of the approximated expressions are fairly close to those of the exact ones. It is also shown that the proposed algorithm for the throughput maximization is very close to the optimal performance obtained by a two-dimensional exhaustive search.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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