The transfer matrix of a multi$-$input multi$-$output $($MIMO$)$ channel shown in Fig. $2$ is $=[10\mathrm{.}50\mathrm{.}30\mathrm{.}1],$ where the entry in row $=1,2$ and column $=1,2$ indicates the channel transfer factor from the transmitted symbol $$ at antenna $$ to the received symbol $$ at antenna $.$ The dashed arrows in Fig. $2$ between the antennas $$ and $,$ where $!=,$ indicate the interference between the spatial dimensions.