A Fast Hybrid Beamforming Scheme for High-Speed Railway Communications

• Main Authors: Yu Xiao, Gang Qiu, Yafeng Wang
• Format: Article
• Language: English
• Published: MDPI AG 2019-09-01
• Series: Electronics
• Subjects: massive MIMO; hybrid beamforming; high-speed railway; beam-searching; outage probability
• Online Access: https://www.mdpi.com/2079-9292/8/9/998

With the increasingly demand for reliable mobile communication service in the high-speed railway (HSR) system, the service stability of HSR communication is of great concern in recent research. Focusing on ensuring the quality of services (QoS) and system throughput, massive multi-input multi-output (massive MIMO) and beamforming technologies have been widely applied. In this paper, aiming to minimize the communication outage probability (OP) and not to decrease spectrum efficiency (SE) too much, we propose a fast HBF (F-HBF) scheme for HSR communications. The proposed scheme uses a low-complexity beam-searching algorithm to trace high-speed trains in real time. The simulation results verify that the proposed scheme can significantly reduce OP without too much SE degradation.