Performance analysis of spatial channel separation for interference mitigation in femtocellular systems

In this paper we focus on analyzing the performance of spatial channel separation method to mitigate the interference experienced by the macro user equipment (MUE) trapped inside a closed access femtocell for a Long Term Evolution (LTE) system. This is implemented by un-correlating the MIMO (Multi Input Multi Output) channels between each transmitter-receiver pair so that the transmissions of eNB (evolved Node B) - MUE and HeNB (Home evolved node B) - HUE (Home User Equipment) can happen in different spatial channels. This approach works without the macro-femto coordination and further, no feedback information is required. Our simulation study shows that there is a considerable improvement in signal to interference noise ratio (SINR) at the MUE can be achieved.