MIMO系统中STBC与STTC的性能分析

Analysis of the Performance of STBC and STTC in MIMO Systems

在下一代无线通信中,由于Internet和多媒体的综合应用,使得对可靠的高速数据传输业务的需求快速增长。多输入多输出(MIMO)信道模型在收发端采用了多天线阵列方式,通过空时编码技术实现了一定的空间和时间分集,在大大增加了系统容量,提高频谱利用率的同时改善了传输可靠性。文中对空时格码和空时分组码进行了基本的理论分析,并在此基础上应用到不同天线阵列的MIMO系统中,对系统的误码率和误帧率进行了仿真分析。

With the integration of Intemet and multimedia applications in the next generation wireless communications, the demand for reliable high data rate services is rapidly growing. The Multiple Input Multiple Output channel model in wireless communications adopts multiple element arrays in both ends of the wireless link. This MIMO channel exploits the diversity in both space （antenna） and time domains by using space-time coding, thus significantly increasing the system capacity and improving the reliability of the wireless link. This paper makes a theoretical analysis of the principles of STTC and STBC, and gives the performance of different MIMO systems.