在多天线无人机辅助物联网系统中利用用户集群和固定功率分配
Sang Quang Nguyen1, Anh-Tu Le2, Chi-Bao Le3
1Science and Technology Application for Sustainable Development Research Group, Ho Chi Minh City University of Transport, Ho Chi Minh City 700000, Vietnam.
Sensors (Basel, Switzerland)
|July 8, 2023
概括
这项研究提高了物联网 (IoT) 设备的性能,使用多个天线和非直角多重访问 (NOMA) 的无人机 (UAV) 继电器. 拟议的系统显著提高了可靠性,并优于传统方法.
科学领域:
- 无线通信无线通信
- 物联网 (IoT) 的物联网 (IoT) 的物联网.
- 空中网络 空中网络
背景情况:
- 物联网系统越来越依赖于无人机 (UAV) 来提高连接和覆盖范围.
- 将多天线无人机与非直角多重接入 (NOMA) 集成,为提高物联网设备性能和传输可靠性提供了一个有希望的方法.
研究的目的:
- 调查物联网网络中多天线无人机安装继电器的用户聚类和功率分配策略.
- 分析天线选择技术 (最大传输比率和最佳选择) 对系统性能的影响.
- 在实际场景中评估拟议系统的性能,有或没有直接基站连接.
主要方法:
- 对于物联网设备的中断概率 (OP) 和Ergodic Capacity (EC) 的封闭式表达式的导出.
- 两种多天线无人机场景的比较分析:最大比率传输和最佳选择.
- 在Nakagami-m色条件下的性能评估.
- 与直角多重接入 (OMA) 方案进行比较.
主要成果:
- 无人机上的天线数量严重影响系统性能.
- 停机概率 (OP) 随着信号噪声比 (SNR),天线数量和色严重程度的增加而降低.
- 拟议的基于NOMA的无人机中继系统与OMA相比,显示出优越的中断性能.
- 分析结果通过蒙特卡洛模拟来验证.
结论:
- 多天线无人机安装继电器与NOMA相结合,有效提高物联网系统的可靠性和性能.
- 天线选择策略提供了一种具有成本效益的方法,可以利用多天线的好处.
- 拟议的系统比OMA提供了显著的改进,特别是在中断性能方面.
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