Generalised Spatial Modulation System with Multiple Active Transmit Antennas and Low Complexity Detection Scheme
A generalised spatial modulation (SM) scheme with multiple active transmit antennas, named as multiple active spatial modulation (MA SM) is proposed in this paper. By allowing multiple transmitting antennas in the SM system to transmit different symbols at the same time instant, MA SM takes advantages of the low complexity of SM and high multiplexing gain of Vertical Bell Lab Layered Space Time (V BLAST) system. In the MA SM system, the transmitted symbols are mapped into a high dimensional constellation space including the spatial dimension. The general principle for designing the efficient MA SM for arbitrary number of transmit antennas and modulation scheme is presented. Moreover, a near optimal detection scheme with low complexity for MA SM is also proposed and analyzed. A closed form bound for the bit error probability (BEP) of the proposed detection scheme is also derived in this paper. Numerical results with the comparison among the existing multiple input multiple output (MIMO) systems such as space time block code (STBC) and V BLAST demonstrate the efficiency of MA SM.
IEEE Transactions on Wireless Communications