JOURNAL OF COMMUNICATIONS (JCM)
ISSN : 1796-2021
Volume : 3    Issue : 4    Date : September 2008

Frequency Dependent Indoor MIMO Channel Characterisation between 2 and 12 GHz Based on
Full Spatial Correlation Matrices
Alexis P. García A. and Lorenzo Rubio
Page(s): 8-15
Full Text:
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Abstract
The integration of wideband and multiple-input multiple-output (MIMO) radio technologies
represents a powerful tool for different wireless communication standards. In the test process of
these systems, new strategies for MIMO channel modelling and characterisation are necessary in
order to investigate how the frequency band and the bandwidth affect the system performance. In
this paper, a MIMO channel experimental characterisation based on full spatial correlation (FSC)
MIMO matrices estimated from frequency domain measurements is presented. Measurements
performed between 2 and 12 GHz in a stationary office scenario in both line-of-sight (LOS) and
non-line-of-sight (NLOS) conditions are considered. Results show frequency dependency on the
experimental MIMO channel characteristics under a high SNR regime, equal electric separation
between array elements and isolation of the path loss effect. The ergodic and 1% outage capacities
were reduced while the central frequency increases for different array configurations. Remarkable
changes on the magnitude of the spatial correlation coefficients and on the MIMO system
eigenvalues were observed for different band frequencies.

Index Terms
capacity, eigenvalues, full spatial correlation matrix, mobile radio channels, Multiple-Input Multiple-
Output, space-time communications, spatial correlation