说明：  高速移动环境下（高铁）OFDM关键技术的研究，包括ICI消除，多普勒分集，CDMA-多普勒分集联合等关键技术
(High-speed mobile environment (High Speed Rail) OFDM key technology research, including the elimination ICI, Doppler diversity, CDMA-Doppler sub-set of key technologies such as the Joint)