Spatial Modulation based Orthogonal Time Frequency Space Modulation – Multiple Access

6G communication system built with the purpose for IoT applications, Smart Vehicle, and Industrial automation. In all these fields, the number of devices engaged in communication is increasing daily to obtain more accurate information. It is required for the available spectrum to be effectively used by multiple users in the same application. Multiple Access is the technique that is capable of employing multiple users in the same spectrum. OTFS is a strong modulation technique that produces low-latency communication with good spectral efficacy. Spatial Modulation is one of the MIMO schemes, that utilizes the bandwidth in a well-organized manner with high energy efficiency. Thus, the proposed model combined the Spatial modulation-based MIMO and Multiple access method in the OTFS system to improve the spectral usage productively. The proposed method is simulated outperforms the conventional schemes and the performance are compared in different scenario.