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MIMO与OFDM技术的结合,有效对抗频率选择性衰落、提高数据传输速率、增大系统容量,是第四代移动通信系统研究的热点问题。本文介绍了4G移动通信中的MIMO-OFDM的基本原理及MIMO-OFDM系统的关键技术包括信道估计、同步、空时编码技术和分集技术。
The combination of MIMO and OFDM technology to effectively combat frequency selective fading, increase data transmission rate, and increase system capacity is a hot issue in the fourth generation of mobile communication systems. This paper introduces the basic principle of MIMO-OFDM in 4G mobile communication and the key technologies of MIMO-OFDM system including channel estimation, synchronization, space-time coding and diversity techniques.