IRS-Aided Wireless Relaying for High-Speed Train Communication: Beamforming Design and Channel Estimation

Jie Feng1; Beixiong Zheng2; Changsheng You3; Xue Xiong4; Jie Tang1; Fangjiong Chen1; Rui Zhang5,6

2024

10.1109/TWC.2024.3466555

IEEE Transactions on Wireless Communications   影响因子和分区

1558-2248

High-speed train (HST) communication plays a crucial role in providing reliable data services to passengers inside the trains. However, due to the train’s high mobility, a fast time-varying channel generally exists between the static BS and high-speed users, resulting in severe communication performance degradation. To address this issue, we propose in this paper an intelligent reflecting surface (IRS)-aided HST relaying system, where an IRS is integrated with the relay to aid the data transmission from the BS to the relay. Specifically, an optimization problem is formulated to maximize the received signal-to-noise ratio (SNR) at the relay by jointly optimizing the active transmit beamforming at the BS, the active receive beamforming at the relay, and the passive reflect beamforming at the IRS. To solve this problem, we first decouple it into two simpler sub-problems by leveraging the low-dimensional channel decomposition of the high-dimensional BS-relay channel matrix, and then solve them in closed-form with low complexity. Additionally, an efficient transmission protocol tailored for HST communication systems is proposed to implement channel estimation and beam tracking with low complexity. Simulation results verify the performance gains of the proposed IRS-aided HST relaying system, compared with the traditional relaying scheme without IRS and other benchmark schemes.

其他

1.School of Electronic and Information Engineering, South China University of Technology, Guangzhou, China
2.School of Microelectronics, South China University of Technology, Guangzhou, China
3.Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, China
4.School of Future Technology, South China University of Technology, Guangzhou, China
5.Shenzhen Research Institute of Big Data, School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Guangdong, China
6.Department of Electrical and Computer Engineering, National University of Singapore, Singapore

Jie Feng,Beixiong Zheng,Changsheng You,et al. IRS-Aided Wireless Relaying for High-Speed Train Communication: Beamforming Design and Channel Estimation[J]. IEEE Transactions on Wireless Communications,2024,PP(99).

Jie Feng.,Beixiong Zheng.,Changsheng You.,Xue Xiong.,Jie Tang.,...&Rui Zhang.(2024).IRS-Aided Wireless Relaying for High-Speed Train Communication: Beamforming Design and Channel Estimation.IEEE Transactions on Wireless Communications,PP(99).

Jie Feng,et al."IRS-Aided Wireless Relaying for High-Speed Train Communication: Beamforming Design and Channel Estimation".IEEE Transactions on Wireless Communications PP.99(2024).