MIMO Antenna Configuration for LTE in Railway

In this paper, the MIMO system performance under different antenna configurations is studied based on the single frequency network (SFN) MIMO channel model in the high-speed railway scenarios. From the perspective of antenna correlation, the system throughput under linear arrays and circular arrays are simulated. The results show that the system throughput in the 2 x 2 MIMO system using space division multiplexing can be doubled compared to SISO, and the MIMO system using spatial diversity can achieve the maximum throughput of the system same as SISO. For a 2-element antenna array, a linear array placed perpendicular to the rails provides better system performance. For a 4-element antenna array, a circular array with a certain angle between the normal and the rail direction is better than a linear array in a restricted placement area.