OFDM system scattering channel characteristics analysis and estimation under the scenarios of high-speed railway

High data rate requirements and reliable performances over fast fading channels are concerned more and more for wireless systems, especially when it comes to high-speed railway. This paper gives a detailed analysis of high moving wireless channel characteristics of non-widesense stationary uncorrelated scattering(Non-WSSUS), including other main influencing factors and time-varying conditions, and establishes the scattering channel model, which describes the approximate operation scenarios of high-speed rail line. Considering the OFDM technology, we propose an OFDM scattering channel system. This work has great potential application values in multimedia data transmission. Finally, in order to verify this model, based on a given OFDM system´s specifications, we use the conventional least square (LS) algorithm to simulate the channel estimation, which extends the research field of the OFDM channel estimation under the environment of high-speed railway.