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.