Experimental Investigation of the Joint Spatial and Polarisation Diversity for MIMO Radio Channel

This paper presents analysis of MIMO radio channel measurements. A description of both the measurement set-up and the picocell environment is given. The correlation properties of the MIMO radio channel are investigated considering different diversity techniques such as spatial, polarisation and joint spatial and polarisation diversity techniques. It is shown that a combination of space and polarisation diversity is an attractive solution for achieving compact MIMO implementation especially when a large number of antenna ports is considered. The issue of unbalanced Branch Power Ratio (BPR) is addressed and its influence on the power gain of the potential subchannel generated by the MIMO concept is analysed.

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