quadrature spatial modulation (GPQSM), that extends the conventional quadrature spatial
modulation to the receiver side. In GPQSM, spatial modulation works in both the in-phase
and quadrature parts of the received signals, thus conveying additional information bits
compared with conventional generalized precoding-aided spatial modulation (GPSM). The
proposed scheme is general and can degenerate into the conventional multiple-input …