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International Journal of Antennas and Propagation
Volume 2014 (2014), Article ID 287159, 10 pages
http://dx.doi.org/10.1155/2014/287159
Research Article

A Semiempirical MIMO Channel Model in Obstructed Viaduct Scenarios on High-Speed Railway

1Institute of Broadband Wireless Mobile Communications, Beijing Jiaotong University, Beijing 100044, China
2National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China

Received 13 November 2013; Revised 14 April 2014; Accepted 17 April 2014; Published 12 June 2014

Academic Editor: Selvan T. Krishnasamy

Copyright © 2014 Tao Zhou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A semiempirical multiple-input multiple-output (MIMO) channel model is proposed for high-speed railway (HSR) viaduct scenarios. The proposed MIMO model is based on the combination of realistic single-input single-output (SISO) channel measurement results and a theoretical geometry-based stochastic model (GBSM). Temporal fading characteristics involving -factor and Doppler power spectral density (PSD) are derived from the wideband measurement under an obstructed viaduct on Zhengzhou-Xi’an HSR in China. The GBSM composed of a one-ring model and an elliptical model is employed to describe the entire propagation environment. Environment-related parameters in the GBSM are determined by the measured temporal fading properties. And a close agreement is achieved between the model results and measured data. Finally, a deterministic simulation model is established to perform the analysis of the space-time correlation function, the space-Doppler PSD, and the channel capacity for the measured scenario. This model is more realistic and particularly beneficial for the performance evaluation of MIMO systems in HSR environments.