In this letter, we propose a novel two-stage clustering detector for spatial modulation multiple-input multiple-output (SM-MIMO) systems. Firstly, the quality of the clustering result (i.e., cluster centroids) of the conventional KMC detector will be checked through the proposed rule in the first stage. Then, with the aid of the good cluster centroids of the bad clustering result and the symmetry property of the good cluster centroids, the bad cluster centroids are obtained from the first stage will be corrected to good cluster centroids in the second stage. Furthermore, a new two-stage clustering detector is proposed correspondingly. Our simulation results show that the proposed two-stage clustering detector outperforms other clustering detectors and is capable of achieving near maximum-likelihood (ML) performance with considerably low complexity.

中文翻译：

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用于 SM-MIMO 通信的两级聚类检测器

在这封信中，我们提出了一种用于空间调制多输入多输出 (SM-MIMO) 系统的新型两级聚类检测器。首先，将通过第一阶段提出的规则检查传统 KMC 检测器的聚类结果（即聚类质心）的质量。然后，借助坏聚类结果的好簇质心和好簇质心的对称性，将第一阶段得到的坏簇质心在第二阶段修正为好的簇质心。此外，相应地提出了一种新的两阶段聚类检测器。我们的模拟结果表明，所提出的两阶段聚类检测器优于其他聚类检测器，并且能够以相当低的复杂度实现接近最大似然（ML）的性能。