Performance of multiuser MIMO system employing block diagonalization with antenna selection at mobile stations

This paper reports investigations into capacity of a multiuser Multiple-Input Multiple-Output (MIMO) system which uses a block diagonalization (BD) scheme with antenna selection at mobile stations (MSs). It is shown that the antenna selection at MSs improves capacity while at the same time it offers an effective solution to hardware size and cost. Also it is advantageous from the point of view of simplicity of signal processing at mobile stations. Two antenna selection schemes are investigated, one is the norm-based selection and the other is project-maximization selection. The simulations results show that the project-maximization selection is superior over the norm-based selection.