Precoded space time block code for spatial modulation

Spatial modulation (SM), which uses the spatial dimension to transmit information and removes ICI completely between transmit antennas, is a promising transmission schemes that has been proposed for multi input multi output systems. In this paper a novel scheme called “precoded STBC for Spatial modulation” is proposed, which accumulates the benefits of both the schemes by eradicating its drawbacks. In this proposed scheme DFT codebook based precoding technique is used which intensively decrease the pair wise error probability of STBC code with improving system performance. Hence the combination of precoding STBC with SM employs the transmission of data on antenna indices with high spectral efficiency and with low probability of error by exploiting CSI at transmitter side. The simulation result justifies our theoretical analysis and demonstrates the performance advantages of the proposed precoded STBC-SM over STBC, Precoded STBC and STBC-SM.