Quadrature spatial modulation (QSM) is recently regarded as a technique to combat inter‐channel interference (ICI) for future wireless systems. In this paper, we consider a system of QSM combining space time block codes (STBC) and continuous phase modulation (CPM). In the system, the spatial constellation symbols are not expanded by two in‐phase and quadrature components, but represented by two STBC symbols. Moreover, we employ K‐means clustering algorithm to decrease the correlation of two transmit antennas. Then in the system, the bit error ratio (BER) performances are derived and evaluated for CPM and linear modulations (PSK, QAM). It is demonstrated that the proposed system has the advantages of BER performance and power spectrum density compared to its counterpart with linear modulations or without K‐means clustering of antennas.

中文翻译：

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带时空块编码CPM MIMO系统的正交空间调制

正交空间调制（QSM）最近被视为对抗未来无线系统的信道间干扰（ICI）的技术。在本文中，我们考虑一个结合了空时分组码（STBC）和连续相位调制（CPM）的QSM系统。在系统中，空间星座图符号不扩展两个同相和正交分量，而是用两个STBC符号表示。此外，我们采用K均值聚类算法来减少两个发射天线的相关性。然后在系统中，导出误码率（BER）性能并评估其CPM和线性调制（PSK，QAM）。结果表明，与采用线性调制或不使用K-均值天线簇的系统相比，该系统具有BER性能和功率谱密度的优势。