Performance Analysis for a Two-Ring Distributed MIMO-OFDM System

Distributed MIMO technology is an effective way of dealing with the inter-cell interference problem in single frequency wireless communication networks. This paper studies the generic channel capacity formula for a distributed MIMO-OFDM system. A practical two-ring STBC distributed MIMO-OFDM transmission scheme is introduced. The cell throughput formula for this distributed scheme is derived. The impact of inner cell radius on cell throughput performance is analyzed for a multi-cell simulation model. From simulation results, we show that the two-ring distributed scheme can effectively mitigate inter-cell interference and provide good radio propagation channel quality, particularly for users at cells boundary. Moreover, we show that, with proper inner cell radius, the two-ring distributed MIMO-OFDM scheme can achieve significant cell throughput gain compared with that of conventional centralized MIMO-OFDM scheme.