Spatial modulation-based transmitter and communication method employing lens antenna

A spatial modulation-based communication method employing a lens antenna, the method comprising:

• performing, by a multi-antenna system, non-orthogonal multiple access and spatial modulation for an input signal;
• determining, by the multi-antenna system, a target unit antenna which will transmit data in a spatial modulation manner at a current time point among a plurality of unit antennas;
• and
• transmitting, by the multi-antenna system, spatially modulated data through the target unit antenna,
• wherein each of the unit antennas includes a plurality of antenna units and a lens structure which shifts a phase of an electromagnetic wave output by at least one of the plurality of antenna units,
• wherein the lens structure shifts the phase so that the plurality of antenna units have different radiation patterns, and
• wherein the multi-antenna system determines the target unit antenna among the plurality of unit antennas on the basis of directivity.