Broadband Channel Long Delay Cluster Measurements and Analysis at 2.4GHz in Subway Tunnels

He, Ruisi and Zhong, Zhangdui and Briso Rodriguez, Cesar (2011). Broadband Channel Long Delay Cluster Measurements and Analysis at 2.4GHz in Subway Tunnels. In: "2011 IEEE 73rd Vehicular Technology Conference (VTC Spring)", 15/08/2011 - 18/08/2011, Yokohama, Japón. ISBN 978-1-4244-8332-7. pp. 1-5.

Description

Title: Broadband Channel Long Delay Cluster Measurements and Analysis at 2.4GHz in Subway Tunnels
Author/s:
  • He, Ruisi
  • Zhong, Zhangdui
  • Briso Rodriguez, Cesar
Item Type: Presentation at Congress or Conference (Article)
Event Title: 2011 IEEE 73rd Vehicular Technology Conference (VTC Spring)
Event Dates: 15/08/2011 - 18/08/2011
Event Location: Yokohama, Japón
Title of Book: Proceedings of 2011 IEEE 73rd Vehicular Technology Conference (VTC Spring)
Date: 2011
ISBN: 978-1-4244-8332-7
Subjects:
Faculty: E.U.I.T. Telecomunicación (UPM)
Department: Ingeniería Audiovisual y Comunicaciones [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The delay caused by the reflected ray in broadband communication has a great influence on the communications in subway tunnel. This paper presents measurements taken in subway tunnels at 2.4 GHz, with 5 MHz bandwidth. According to propagation characteristics of tunnel, the measurements were carried out with a frequency domain channel sounding technique, in three typical scenarios: line of sight (LOS), Non-line-of-sight (NLOS) and far line of sight (FLOS), which lead to different delay distributions. Firstly IFFT was chosen to get channel impulse response (CIR) h(t) from measured three-dimensional transfer functions. Power delay profile (PDP) was investigated to give an overview of broadband channel model. Thereafter, a long delay caused by the obturation of tunnel is observed and investigated in all the scenarios. The measurements show that the reflection can be greatly remained by the tunnel, which leads to long delay cluster where the reflection, but direct ray, makes the main contribution for radio wave propagation. Four important parameters: distribution of whole PDP power, first peak arriving time, reflection cluster duration and PDP power distribution of reflection cluster were studied to give a detailed description of long delay characteristic in tunnel. This can be used to ensure high capacity communication in tunnels

More information

Item ID: 13179
DC Identifier: http://oa.upm.es/13179/
OAI Identifier: oai:oa.upm.es:13179
Official URL: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=5956539
Deposited by: Memoria Investigacion
Deposited on: 29 Nov 2012 11:09
Last Modified: 21 Apr 2016 12:30
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