Analysis of MIMO capacity for spatial channel model with partial CSI knowledge

Multiple-input multiple-output (MIMO) antenna systems provide high capacity gain over a single-antenna system. Much attention has been given to MIMO systems in recent past. In this paper, analysis over the capacity of the MIMO channel systems with spatial channel has been considered when the channel state information (CSI) is considered partially or imperfect since because only partial information can be obtained at the receiver end. It is known that channel gain is maximised when CSI is available at the transmitter. It is found that in the case of partial or imperfect CSI the capacity depends on the statistical properties of the error in the CSI. Based on the knowledge of statistical distributions of the deviations in CSI knowledge, a new approach which maximises a capacity of spatial channel model has been tried.