Analysis performance of decode-and-forward scheme in distributed MIMO repeater system

Multiple-input multiple-output (MIMO) repeater systems have been discussed in several published papers. When a repeater has only one antenna element, the propagation environment is called keyhole. In this kind of scenario an achievable channel capacity and a link quality are decreased. Another limit is when the number of the antenna element of a repeater is larger than the one of a MIMO transceiver, the channel capacity cannot be increased. In this paper, to obtain an upper bound of the channel capacity, we express a propagation process of the distributed MIMO repeater system with decode-and-forward method by the numerical formula, and optimize the position of each repeater.