Affiliation:
1. State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, China
2. The China Academy of Information and Communications Technology (CAICT), China
Abstract
The tunnel scenario is a major rail communication scenario. In this paper, the radio channel characteristics of tunnel scenarios with different carrier frequencies, different distances between the transmitter (Tx) and receiver (Rx), and cross sections are simulated with a ray-tracing tool. Key parameters such as path loss, Rician K-factor, root mean square (RMS) delay spread, and angular spread are studied. According to the results, higher frequencies introduce larger path loss and the presence of the vehicle body increases the path loss by about 35 dB in the scenario; at the same time it will also cause the fluctuation and instability of the path loss. Besides, the influence of reflections from the side walls is significant on radio propagation. The channel experiences more severe fading in a narrow tunnel compared with others.
Funder
Fundamental Research Funds for the Central Universities
Subject
Electrical and Electronic Engineering,Computer Networks and Communications,Information Systems
Cited by
6 articles.
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