Journal of IKEEE (전기전자학회논문지)

Institute of Korean Electrical and Electronics Engineers (한국전기전자학회)
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Performance Analysis of a UAV Energy Harvesting Relay Network in the Terahertz Band

테라헤르츠 대역 무인비행체 에너지 수확 릴레이 네트워크 성능분석

  • Yeongi Cho (Dept. of Electronic Engineering, Hanbat National University) ;
  • Saifur Rahman Sabuj (Dept. of Electronic Engineering, Hanbat National University) ;
  • Han-Shin Jo (Dept. of Electronic Engineering, Hanbat National University)
  • Received : 2023.10.12
  • Accepted : 2023.10.19
  • Published : 2023.12.31
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Abstract

Unmanned aerial vehicle (UAV)-assisted relay has the advantages of ease of deployment, good communication channels, and mobility over traditional terrestrial relay, which greatly improves wireless connectivity. In this paper, we design a UAV-enabled relay network that can utilize radio frequency bands to harvest energy from sources and utilize terahertz (THz) bands to transmit information between secondary transmitters and receivers. Next, we solve the optimal position of the UAV that maximizes the relay channel capacity, and propose an algorithm to design two trajectories of UAV (a straight and an elliptical trajectory) using the derived solution. Numerical results show that the straight trajectory is better in terms of harvested energy and channel capacity.

무인 항공기(UAV) 지원 중계는 분포가 쉽고 통신 채널이 양호하며, 이동성이 뛰어나 기존 지상 중계에 비해 높은 무선 연결성을 가질 수 있다. 본 논문에서는 무선 주파수(RF) 대역을 활용하여 소스로부터 에너지를 수확하고 테라헤르츠(THz) 대역을 활용하여 2차 송신기와 해당 수신기 간에 정보를 전송할 수 있는 UAV 지원 중계 네트워크를 설계한다. 그 후, 릴레이 채널 용량을 최대화하는 UAV의 최적 위치를 결정하기 위한 최적화 문제의 해를 유도하고, 유도된 해를 활용하여 두 가지 UAV 궤적(직선 궤적과 타원 궤적)을 설계하는 알고리즘을 제안한다. 시뮬레이션 결과, 제안된 알고리즘은 UAV 직선 궤도가 수확된 에너지 및 채널 용량 측면에서 더 나은 시스템 성능을 제공할 수 있음을 보여준다.

Keywords

Acknowledgement

This research was supported by the research fund of Hanbat National University in 2022.

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