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International Journal of Antennas and Propagation
Volume 2013 (2013), Article ID 345908, 6 pages
http://dx.doi.org/10.1155/2013/345908
Research Article

Limits on Estimating Autocorrelation Matrices from Mobile MIMO Measurements

Communications Research Centre Canada, P.O. Box 11490, Station H, 3701 Carling Avenue, Ottawa, ON, Canada K2H 8S2

Received 3 December 2012; Accepted 8 January 2013

Academic Editor: Pablo Padilla

Copyright © 2013 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

On mobile radio links, data samples collected at successive time intervals and at closely spaced frequencies are correlated, so long data records are required to acquire sufficient independent samples for analysis. Statistical analysis of long data records is not reliable because the channel statistics remain wide-sense stationary only over short distances. This is a particular concern for MIMO systems when full autocorrelation matrices may be required for channel modelling or characterisation. MIMO channel responses from mobile measurements in an urban microcell have been used to investigate the limits on estimating autocorrelation matrices, and these are compared to those predicted by commonly used channel models.