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International Journal of Antennas and Propagation
Volume 2011, Article ID 675343, 14 pages
http://dx.doi.org/10.1155/2011/675343
Research Article

Impact of Vehicular Array Position on Urban MIMO Channel Characteristics

Communications Research Centre, Ottawa, ON, Canada K2H 8S2

Received 24 December 2010; Revised 10 March 2011; Accepted 18 July 2011

Academic Editor: Z. Chen

Copyright © 2011 Christopher C. Squires and Tricia J. Willink. 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

MIMO channel measurements have been performed in urban environments with antenna arrays positioned on the roof and sides of the measurement vehicle. Analysis of the data shows that the array's position on the vehicle, along with the location and orientation of the vehicle with respect to the transmitter, can have a considerable impact on the channel characteristics observed. Array elements on the vehicle's roof receive the same multipath components, and, therefore, have identically distributed channel responses. However, the characteristics of the multipath components observed at each side of the vehicle can differ significantly. Specifically, shadowing from the vehicle combined with the directionality of the side-mounted array elements affects the angular distribution and powers of the received multipath components, affecting the achievable diversity and channel capacity. This can have significant impact on system performance and should be considered when designing and analyzing vehicular-based signalling techniques.