论文标题
基于LEO卫星的物联网网络的新型直接访问方案的性能分析
Performance Analysis of Novel Direct Access Schemes for LEO Satellites Based IoT Network
论文作者
论文摘要
本文分析了基于低地球轨道（LEO）卫星的性能（IoT）网络，其中每个物联网节点都利用多个卫星与地面站（GS）进行通信。在这项工作中，我们考虑在每个卫星处的固定和可变增益放大和前向（AF）继电器协议，在该协议中，从每个物联网节点接收到的信号在传输到陆地GS进行数据处理之前会放大。为了分析这款基于直接访问架构的新型LEO卫星的性能，考虑到GS处的两个组合方案的封闭形式的表达式是出现的：（i）选择组合； （ii）最大比率组合。此外，为了获得更多有关多样性顺序和编码增益的见解，还进行了高SNR的渐近中断概率分析。最后，提出了仿真结果，以验证得出的分析结果，并为系统性能开发一些有趣的见解。
This paper analyzes the performance of low earth orbit (LEO) satellites based internet-of-things (IoT) network where each IoT node makes use of multiple satellites to communicate with the ground station (GS). In this work, we consider fixed and variable gain amplify-and-forward (AF) relaying protocol at each satellite where the received signal from each IoT node is amplified before transmitting to the terrestrial GS for data processing. To analyze the performance of this novel LEO satellites based direct access architecture, the closed-form expressions for outage probability are derived considering two combining schemes at the GS: (i) selection combining; (ii) maximal ratio combining. Further, to gain more insights for diversity order and coding gain, asymptotic outage probability analysis at high SNR for both schemes is also performed. Finally, simulation results are presented to validate the analytical results derived and also to develop several interesting insights into the system performance.
