Measurements of MIMO capacity at 1800 MHZ with in- and outdoor transmitter locations

A measurement campaign was carried out to analyse several possible transmitter locations for a 4×4 MIMO system. The receiver modules were moved along indoor routes, and both indoor and outdoor locations were considered for the transmitters. The spatial correlation, path loss and capacity were analysed. Also several options regarding signal combination at system level were studied, assuming two base stations with 2 antennas each. As a result, it is shown that the 2×4 configuration with base station selection and waterfilling scheme provides almost as good performance as a 4×4 full waterfilling scheme when the 2 base stations are spatially separated. This solution may be very interesting to reduce system complexity without significant loss of performance.