Power Efficient Generalized Spatial Modulation MIMO for Indoor Visible Light Communications

In this letter, we propose an active-space, collaborative constellation-based generalized spatial modulation (GSM) multiple-input multiple-output encoding that can enhance the power efficiency of indoor visible-light communication compared with the conventional optical GSM. Simulation results verify that the proposed scheme can also achieve performance improvement compared with both spatial modulation and conventional GSM under the line-of-sight channel condition, particularly for higher values of spectral efficiency.