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本文提出一种可用于宽带数字移动通信系统的多输入多输出(MIMO)无线传输系统架构———分组的空时块编码(G-STBC)MIMO结构,即发送天线被分成若干组,组内的多根天线进行STBC编码,而各组发送的数据流相互独立。针对这一系统架构,提出了基于迫零检测的最优排序串行干扰消除(OZFSIC)接收信号检测算法的实现方案。计算机仿真结果表明,这种空时编码MIMO结构在等数据率的情况下能获得比相应的V-BLAST系统更优的性能。G-STBC-MIMO结构可以使发送天线多于接收天线,因此,对于无线通信系统下行链路以及大数据量广播业务系统(如数字高清晰度电视地面传输系统)都较V-BLAST更具有优势。
In this paper, we proposed a G-STBC (MIMO-MIMO) architecture for multiple input multiple output (MIMO) wireless transmission systems that can be used in wideband digital mobile communication systems. That is, the transmit antennas are divided into several groups. Of multiple antennas for STBC encoding, and the data streams sent by each group are independent of each other. In view of this system architecture, an implementation scheme of OZFSIC received signal detection algorithm based on zero-forcing detection is proposed. Computer simulation results show that this space-time coded MIMO architecture can achieve better performance than the corresponding V-BLAST system at equal data rates. The G-STBC-MIMO architecture allows for more transmit antennas than receive antennas, and thus is more advantageous than V-BLAST for both wireless communication system downlinks as well as large volume broadcast service systems such as digital HDTV terrestrial transmission systems .