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A Three-Dimensional Time-Varying Channel Model for THz UAV-Based Dual-Mobility Channels
Kai Zhang1, Fenglei Zhang1, Yongjun Li1
1School of Information and Navigation, Air Force Engineering University, Xi'an 710077, China.
Entropy (Basel, Switzerland)
|November 27, 2024
Summary
This study introduces a 3D channel model for terahertz (THz) unmanned aerial vehicle (UAV) communications, considering dual mobility and atmospheric effects. The model aids in designing reliable THz UAV systems for enhanced wireless connectivity.
Area of Science:
- Wireless Communications
- Electromagnetics
- Aerospace Engineering
Background:
- Unmanned aerial vehicles (UAVs) offer promising aerial base station capabilities for rapid wireless connectivity.
- Analyzing UAV-based wireless channel performance in the terahertz (THz) band is crucial due to high frequencies and mobility.
Purpose of the Study:
- To propose a novel three-dimensional (3D) time-varying channel model for UAV-based dual-mobility wireless channels in the THz band.
- To analyze the statistical properties and performance of this THz UAV channel model.
Main Methods:
- Developed a 3D time-varying channel model based on geometric channel theory for THz frequencies.
- Incorporated small-scale fading (scattering, reflection) and atmospheric molecule absorption.
- Derived path loss, time autocorrelation function (T-ACF), and Doppler power spectrum density (DPSD).
Main Results:
- Investigated the impact of UAV and ground user mobility on THz channel characteristics.
- Compared THz band performance with millimeter-wave (mmWave) bands.
- Validated the model's correctness through simulations.
Conclusions:
- The proposed channel model accurately represents THz UAV dual-mobility scenarios.
- Provides valuable insights for designing efficient THz UAV communication systems.
- Highlights key parameters influencing channel performance for system optimization.
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