Work in progress: LTE system performance evaluation in high-speed environment

In the case of high-speed railway environment, the performance of mobile communication system is a key issue, which will affect the reliability and efficiency in the wireless communication. In this paper, a LTE system of MIMO based on hardware-in-the-loop (HIL) technology is built to evaluate the performance of LTE system. It contains a transmitter, a receiver and a radio channel emulator with software defined radio (SDR) technology. This system, including figures of the Error Vector Magnitude (EVM) and the Error Bit Ratio (BER), will be obtained under different speeds (80~400km/h) and different scenarios (WINNER C2, WINNER D2 and WINNER D2a). Then, the analysis of relationship between EVM and BER are detailed. At last, environmental factors are inferred which may affect the high-speed mobile communication quality.