An Inter-Cell Interference Cancellation Scheme with Multi-Cell Coordinated Scheduling for Downlink of MIMO/OFDM Cellular Systems

摘要

Next generation cellular mobile communication systems require cell-edge throughput improvement as well as performance improvement of peak throughput and system throughput. Recently, coordinated multi-cell MIMO technologies have been receiving considerable attention due to their cell-edge throughput improvement. Unfortunately, these technologies have difficulty in improving both cell-edge throughput and system throughput, simultaneously, under fully-loaded traffic conditions. For the simultaneous improvement of cell-edge and system throughput, inter-cell interference (ICI) cancellation has been investigated as a promising approach. In our previous studies, downlink transmission schemes with ICI canceling signal detection base on joint detection were proposed for MIMO/OFDM cellular systems. However, the ICI canceling signal detection is too complex for mobile stations to implement since the MS receiver requires information of the transmission scheme used by the interference signals such modulation and precoding. This paper proposes an ICI cancellation scheme by combining multi-cell coordinated scheduling and a simple linear interference canceling algorithm for the downlink transmission of MIMO/OFDM cellular systems. This paper evaluates the transmission performance of the proposed scheme, and clarifies its effectiveness.