During these years, mobile telecommunication system based on LTE has been largely studied and has formed a mature technical system. For special application scenarios and business requirement, a comprehensive and new generation of railway mobile telecommunication system based on LTE is bound to take shape via innovative researches and technology improvements. Under fast- moving scenario of high-speed railway, the performance of signal system transmission is severely interfered by OFDM, subcarrier signal frequency shift due to Doppler Effect. Given that, this paper focuses on Doppler Shift estimation for high-speed railway scenario and combines Doppler Shift estimation based on cyclic prefix as well as the estimation based on pilot frequency to propose an improved Doppler Shift estimation so as to raise estimated accuracy and anti- multipath capability.
['Tianfu Liu', 'Xiaoping Ma', 'Ruhao Zhao', 'Honghui Dong', 'Limin Jia']
Doppler Shift Estimation for High-Speed Railway Scenario