Performance Evaluation of MIMO Architectures with Moving Relays in High-Speed Railways

In this paper, performance evaluation and system level simulation results for a communication architecture based on LTE base stations and Moving Relay Nodes (MRNs) with multiuser Multiple-Input-Multiple-Output (MIMO) capacity, deployed on high speed railways (HSR), are presented. In the proposed architecture, each MRN and base station (DeNB) performs ordinary diversity MIMO transmission and reception. It will be shown that a communication system with MRNs and DeNBs with 2x2, 2x4 and 4x4 MIMO capacity provide significant improvements to the throughput achievable by passengers. In addition to this, results on the throughput of other users (macro-cell users) located in cells through which the train moves are also presented. It will be confirmed that the use of MIMO techniques has substantial benefits for the capacity of the MRN regardless of the number of macro and on-board users.