Fig. 3
From: Multiple transmit antennas for low PAPR spatial modulation in SC-FDMA: single vs. multiple streams
PAPR comparison for SC-FDMA GLPSM in the case of eight transmit antennas. The figure presents the PAPR comparison for all three proposed GLPSM techniques (SS-GSLPM, GSS-GLPSM, and MS-GLPSM) and the conventional SC-FDMA and OFDM, given as the references. All transmit antennas have similar PAPR curves, hence, for the sake of clarity, only curves for antenna 3 are presented. In all observed techniques, the underlying modulation is 16-QAM. It can be concluded that all three proposed techniques maintain the same PAPR level as the conventional SC-FDMA and that their PAPR levels are determined by the underlying modulation. Furthermore, MS-GLPSM maintains the same PAPR level regardless of the number of streams used.