| Title |
3D Beam Tracking Algorithm using Hybrid Beamforming in UAV-enabled Massive MIMO System |
| Authors |
신승석(Seungseok Sin) ; 심윤아(Yuna Sim) ; 조지훈(Jihun Cho) ; 문상미(Sangmi Moon) ; 황인태(Intae Hwang) |
| DOI |
https://doi.org/10.5573/ieie.2023.60.8.3 |
| Keywords |
3D beam tracking; Hybrid beamforming; Multiple-input multiple-output; Orthogonal frequency division multiplexing |
| Abstract |
Three-dimensional (3D) beamforming is an effective technology for performance improvement in cellular-connected unmanned aerial vehicle (UAV) communication. However, short wavelengths due to high frequencies of millimeter wave frequencies cause problems of signal attenuation and path loss, and to compensate for this, interest in research on high-directional beamforming technology is growing. In addition, due to the mobility of the UAV, it is essential to track the exact angle of the beam in order to obtain a complete beamforming gain. Therefore, this paper proposes a 3D-based beam tracking method using hybrid beamforming. Using the LoS (Line of Sight) dominant path of channels between T-BS and UAV-UE, this paper proposes a new beam tracking algorithm capable of dynamic pilot insertion based on closed-loop feedback control. Simulations show that the proposed beam tracking method has improved overall performance in terms of beamforming gain and spectral efficiency (SE). In addition, the analog beamforming method was expanded to hybrid beamforming to allow the algorithm to be used increasing data capacity and increasing utilization in NR MIMO-OFDM (New Radio Multiple-Input Multiple-Output - Orthogonal Frequency Multiplexing) systems. |