3.1 Space Shift Keying (SSK)3.2 Generalized Space Shift Keying (GSSK)3.3 Spatial Modulation (SM)3.4 Generalized Spatial Modulation (GSM)3.5 Quadrature Space Shift Keying (QSSK)3.6 Quadrature Spatial Modulation (QSM)3.7 Generalized QSSK (GQSSK)3.8 Generalized QSM (GQSM)3.9 Advanced SMTs3.10 Complexity Analysis of SMTs3.11 Transmitter Power Consumption Analysis3.12 Hardware Cost3.13 SMTs Coherent and Noncoherent Spectral Efficiencies