Abstract—A generalised spatial modulation (SM) scheme with

multiple active transmit antennas, named as multiple activespatial

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