STBC-MIMO系统中的空频均衡接收方案

提出了一种采用空时分组码(STBC)传输的多输入多输出(MIMO)系统的空频均衡接收方案。该方案对MIMO系统发送端天线进行分组，每组用2根发射天线发送一路独立的经过数据块级STBC编码的数据，以获得发射天线分集增益；在接收端采用单载波频域均衡和串行干扰消除(SIC)技术抵抗频率选择性MIMO- CDMA(码分多址)信道下的各种干扰。考虑了信道估计误差对系统性能的影响，并对算法复杂度进行了分析。仿真结果显示，在接收机复杂度增加不大的情况下，系统性能获得了很大提升。

A Space-Frequency Equalization Receiver Scheme for STBC-MIMO Systems

A space-frequency equalization receiver scheme is proposed for space-time block-coded multiple-input multiple-output (STBC-MIMO) systems. The scheme exploits transmit diversity through grouping of the transmit antennas of MIMO systems and implementation of block level space-time block-coding for each group. Subsequently, the processed independent signals of each group are radiated from the respective two transmit antennas. Also, at the receiver, the single-carrier frequency-domain equalization and the successive interference cancellation (SIC) are used to combat with various interferences resulting from the frequency selective MIMO - code division multiple access (CDMA) channels. In addition, the channel estimation errors and the computational complexities are considered. It is shown that the proposed systems significantly outperform the traditional ones while the receiver is still simple.