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Measurement of Distributed Antenna Systems at 2.4 GHz in a Realistic Subway Tunnel Environment

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4 Author(s)
Ke Guan ; State Key Lab. of Rail Traffic Control & Safety, Beijing Jiaotong Univ., Beijing, China ; Zhangdui Zhong ; Alonso, J.I. ; Briso-Rodriguez, C.

Accurate characterization of the radio channel in tunnels is of great importance for new signaling and train control communications systems. To model this environment, measurements have been taken at 2.4 GHz in a real environment in Madrid subway. The measurements were carried out with four base station transmitters installed in a 2-km tunnel and using a mobile receiver installed on a standard train. First, with an optimum antenna configuration, all the propagation characteristics of a complex subway environment, including near shadowing, path loss, shadow fading, fast fading, level crossing rate (LCR), and average fade duration (AFD), have been measured and computed. Thereafter, comparisons of propagation characteristics in a double-track tunnel (9.8-m width) and a single-track tunnel (4.8-m width) have been made. Finally, all the measurement results have been shown in a complete table for accurate statistical modeling.

Published in:

Vehicular Technology, IEEE Transactions on  (Volume:61 ,  Issue: 2 )

Date of Publication:

Feb. 2012

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