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Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
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Transmission lines are essential components of electrical power systems. They are characterized by the distributed nature of resistance (R), inductance (L), and capacitance (C) per unit length. To analyze these lines, differential equations are employed to model the variations in voltage and current along the line.
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Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
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使用OTFS调制的无人机选择高速列车通信.

Ehab Mahmoud Mohamed1, Sherief Hashima2,3

  • 1Department of Electrical Engineering, College of Engineering in Wadi Addawasir, Prince Sattam Bin Abdulaziz University, 11991, Wadi Addawasir, Saudi Arabia. ehab_mahmoud@aswu.edu.eg.

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概括
此摘要是机器生成的。

本研究使用无人机 (UAV) 实现高速列车 (HST) 无线连接. 它使HST能够估计无人机的高度和速度,以实现最佳连接,提高数据速率并减少交付.

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科学领域:

  • 无线通信无线通信
  • 空中网络 空中网络
  • 信号处理 信号处理

背景情况:

  • 高速列车 (HST) 需要可靠的无线连接,但地面基站昂贵,特别是在偏远地区.
  • 无人驾驶飞行器 (UAV) 提供了一个灵活的解决方案,可以为像HST这样的移动平台提供无线覆盖.

研究的目的:

  • 开发一种方法,使HST能够自主选择最佳的无人机,以最大限度地提高数据速率和覆盖时间.
  • 为了解决估计无人机参数 (高度,速度) 的挑战,以便有效选择无人机.

主要方法:

  • 使用延迟多普勒 (DD) 域中的通道参数与正交时频空间 (OTFS) 调制.
  • 根据DD域频道特征,估计HST和无人机之间的相对速度,以及无人机飞行高度.

主要成果:

  • 可以准确估计无人机的高度和相对速度.
  • 高频传感器可以预测无人机覆盖时间,根据剩余的电池容量进行最佳无人机的明智选择.

结论:

  • 拟议的方法有效地增强了使用无人机的高空望远镜的无线连接.
  • 这种方法优化了无人机选择,以提高数据速率和减少交付频率,优于基准.