MULTIPLE ACTIVE SPATIAL MODULATION IN MIMO SYSTEMS

A generalised spatial modulation scheme with multiple active transmit antennas known as multiple active spatial modulation is introduced in this paper. MA-SM has advantages of the low complexity and high multiplexing gain. The transmitted symbols are mapped into a higher dimensional constellation space which includes the spatial dimension. The general principle for the design of MA-SM for arbitrary number of transmit antennas and modulation scheme is described. The detection scheme is near optimal and less complex. A comparison with the existing multiple-input multiple output (MIMO) techniques such as space time block code (STBC) and V-BLAST is also presented which shows the ef?ciency of MA-SM