Optimizing antenna selection using limited CSI for massive MIMO systems

This paper introduces an efficient model of antenna selection for Massive Multiple Input Multiple Output (MIMO) systems. The model uses the channel capacity equation to make a search for only the first optimum antenna and doesn´t need an exhaustive search to find the remaining optimum selected antennas. It exploits the information it attains from first optimum antenna to build a characterization of the remaining optimum selected antennas and how they should look like. It is necessary to send channel state information (CSI) about the selected column vectors of the channel from the receiver to the transmitter as a part of our model requirements. Our proposed model reduces the complexity of exhaustive search significantly. Also, it shows optimum results for two selected antennas and quite good results if the number of selected antennas is three or more.