Base Station Coordinated Multi-user Detection in Multi-cell MIMO Cellular Systems

摘要

In order to effectively cancel Co-Channel Interference (CCI) and reduce Bit Error Rate (BER) in multi-cell MIMO cellular systems, performance of several Multi-User Detection (MUD) techniques based on coordinated multi-point processing (COMP) is studied. Several neighboring base stations coordinate with each other and form a virtual antenna array, serving for users in the coordinated region. Receivers of Zero Forcing (ZF), Minimum Mean-Square-Error (MMSE) and their combination with Successive Interference Cancellation (SIC) are designed and adept by the coordinated base stations and BER of above methods is studied. Simulation results show that BER performance of those COMP methods significantly outperforms single cell processing when interference is considered and is even better than it when interference is free at medium to high SNR. Furthermore, MMSE outperforms ZF and performance is even better when combined with SIC and will still increase with the number of antennas. Finally, MMSE-SIC COMP is shown to be most feasible and effective for interference cancellation in multi-cell MIMO cellular systems.