Apply the Alamouti algorithm for a $2$X$1$ MIMO system, with the data sequence shown below to transmit on the two antennas to a single antenna receiver.

$\backslash$table$[[$Time$,1,2,3,4,5,6],[$Data symbol,$-j,+j,-1,1,-\frac{\sqrt[\phantom{2}]{2}}{2}+\frac{\sqrt[\phantom{2}]{2}}{2}j,-\frac{\sqrt[\phantom{2}]{2}}{2}-\frac{\sqrt[\phantom{2}]{?}}{?}$