Multi-Cell Joint Optimization to Mitigate Pilot Contamination for Multi-Cell Massive MIMO Systems

摘要

In this paper, a multi-cell joint optimization scheme based on pilot allocation is proposed in order to mitigate pilot contamination for multi- cell massive MIMO systems. This method measures interference of each pilot sequence caused by users multiplexing from adjacent cells exploiting the massive MIMO characteristics of fading channels. The scheme takes jointly optimizing a plurality of cells into account to ensure users in poor channel conditions suffering from less interference after the assignment, and improves the system performance with low computational complexity. Simulation results demonstrate the effectiveness of the proposed scheme.