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International Journal of Antennas and Propagation
Volume 2012, Article ID 423759, 7 pages
http://dx.doi.org/10.1155/2012/423759
Application Article

Construction and Capacity Analysis of High-Rank LoS MIMO Channels in High Speed Railway Scenarios

State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing 100044, China

Received 22 July 2012; Revised 22 October 2012; Accepted 22 October 2012

Academic Editor: Thomas Kürner

Copyright © 2012 Jingya Yang 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

The validity of the maximum capacity criterion applied to realize high-rank line-of-sight (LoS) multiple-input multiple-output (MIMO) channels is investigated for high speed railway scenarios. Performance is evaluated by ergodic capacity. Numerical results demonstrate that by simply adjusting antenna spacing according to the maximum capacity criterion, significant capacity gains are achievable. We find relatively low sensitivity of the system to displacements from the optimal point and angle in relatively short range. Thus, we present two proposals to reconfigure antenna arrays so as to maximize LoS MIMO capacity in the high speed railway scenarios