Capacity obtained from multiple-input multiple-output channel measurements in fixed wireless environments at 2.5 GHz

In this paper we present capacity, envelope correlation coefficient, and condition number statistics obtained from 2x2 Multiple-Input Multiple-Output (MIMO) fixed wireless radio channel measurements using dual-polarized antennas. To calculate the capacity, we assume that the transmitter has no knowledge about the channel. The experimental capacity results are compared to the informationtheoretic channel capacity obtained from Monte Carlo simulations. Both theoretical results and experimental results show that depending on the temporal K-factor, rank of the constant matrix, envelope correlation coefficients of the variable matrix, and cross-polarization discrimination, the capacity can assume range of values for a given average SNR. The envelope correlation coefficients were found to be less than 0.42 for the 90% of cases. The condition numbers were found to be less than 10 for the majority of cases.