Abstract
Whole assignments in MIMO wireless communications system can be divided in two global problems: first one is Spatial Diversity (SD) and the second one is Spatial Multiplexing (SM). In this article we were focused on exactly spatial diversity with fading mitigation. Because one of the main aspects of this innovation is the problem of reliability of channel noise immunity. The principle of diversity consists in to provide the receiver with multiple versions of the same signal. Because, if they could be affected in different ways propagation by signaling, the likelihood that they all could be affected at the same time is significantly reduced. Therefore, we applied and got simulation results of Alamouti scheme and another effectiveness algorithms like DET and Tx-MRC to help stabilize our communication system and improves performance while reducing error rates.