Mu-mimo Vs Su-mimo in 4g Networks

With the advent of IMT-Advanced, for the first time the target throughput obtained from wireless networks became comparable with wired counterparts. LTE and WiMAX have been the two main standards developed by 3GPP. The need to enhance the LTE and WiMAX has been driven by demand for higher spectral resources by the smart wireless devices in place of conventional phones. This transition from LTE to LTE Advanced has been brought about by the introduction of new functionalities like Carrier aggregation, enhanced use of Multi-antenna techniques and support for relay nodes. Similarly the transition of WiMAX(Rel 1.0) to WiMAX(Rel 2.0) has been enabled by including support for multi-hop relay operation, extended MIMO modes, support of femtocells and self-organization features. In this paper, a comparison of Single user MIMO and Multi-user MIMO is drawn, and evaluation is done for their feasibility under different environment.