We study the performance of Space Shift Keying modulation which is based on the concept of Spatial modulation for Multiple Input Multiple Output (MIMO) system. SSK is operated as Orthogonal SSK (OSSK) and Bi-Orthogonal SSK (BiSSK) and the Bit Error probability (BEP) is evaluated for performance measurement. In the proposed system, Spatial Modulation is used in the low-complexity MIMO Systems over the Rayleigh fading Channel to consider the Multipath propagation that exist in MIMO Systems when the Transmitter antenna diversity is increased and it is shown that we get better results as compared to the existing method using Rician fading Channel. © 2016 IEEE.