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文章提出在空时分组编码的MIMO系统中利用OPAST这种子空间追踪算法进行盲空时多用户检测。仿真结果表明,这种子空间追踪算法可以联合实现平坦瑞利衰落信道估计和空时多用户检测。针对不同的空时分组编码的MIMO通信系统模型,这种盲自适应空时多用户检测方法可以抵抗严重的远近效应和抑制多址干扰,并具有很好的动态跟踪能力。
In the space-time block coding MIMO system, the paper proposes to use OPAST subspace tracking algorithm for blind space-time multi-user detection. The simulation results show that this subspace tracking algorithm can jointly implement flat Rayleigh fading channel estimation and space-time multi-user detection. For different MIMO systems with space-time block coding, this blind adaptive space-time multi-user detection method can resist severe near-far effect and suppress multiple access interference and has good dynamic tracking capability.