Design and Analysis of an Antenna Control Mechanism for Time Division Duplexing Distributed Antenna Systems Over High-Speed Rail Communications

作者：Wang Hung Hsiang; Hou Hsin An; Chen Jyh Cheng^*

来源：IEEE Transactions on Emerging Topics in Computing, 2016, 4(4): 516-527.

DOI：10.1109/TETC.2015.2414231

• Railway communications
• distributed antenna system (DAS)
• radio over fiber (RoF)
• high-speed rail (HSR) communications
• handover

Distributed antenna system (DAS) has been introduced to overcome high mobility issues and to extend signals into coverage-hole areas in high-speed rail communications system. In this paper, we discuss echo channel effect and define the corresponding criteria in a time division duplexing (TDD) DAS railway communications system. Furthermore, timing drift problem while applying moving antenna selection technique to solve the echo channel effect is illustrated. Compensation algorithms then are proposed. Simulation results show that the proposed techniques can not only solve the interference problem in TDD-DAS but also provide better scalability in system deployment.

• 出版日期2016-12