Experimental Analysis of the MIMO Channel for In-door NLOS Multi-path Propagation

Multiple-input and multiple-output (MIMO) channel measurement and analysis are presented based on multiple-input and single-output (MISO) antenna configurations associated with dynamic measurements. The measurement is considered in a time-stationary elliptical scattering in-door propagation scenario, where a special case of the "Kronecker" MIMO channel model is derived and the channel reciprocity for the uplink and downlink is assumed. The cumulative distribution functions (CDF\´s) of the delay spread and fading envelope, as well as the maximum-to-minimum eigenvalue ratio (MMEVR) are investigated and compared with respect to different antenna spacing and angular spread, respectively. For large angular spread, a wider arrival angle shows that it is not necessary to increase the un-correlated inter-subchannels. These analysis results meet most real MIMO channel statistical property scenarios.