Diversity-Achieving Quadrature Spatial Modulation
Diversity-Achieving Quadrature Spatial Modulation
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DOI：
10.1109/tvt.2017.2731989
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发表时间：
2017-07
影响因子：
6.8
通讯作者：
Lei Wang;Zhigang Chen;Zhengwei Gong;Ming-Qi Wu
中科院分区：
文献类型：
--
作者：
Lei Wang;Zhigang Chen;Zhengwei Gong;Ming-Qi Wu
本文基于最近提出的正交空间调制(QSM)概念，提出了一种实现分集的QSM(DA-QSM)传输方案。在所提出的方案中，使用两组色散矩阵，并且在每组中激活$Q$色散矩阵中的$P$。然后，将两组$P$选择的色散矩阵分别与$P$相移键控/二次幅度调制星座符号的实部和虚部进行线性组合。由于使用了额外的色散矩阵索引组合，所提出的DA-QSM方案比现有的DA SM方案，如空时分组码SM(STBC-SM)和空间调制的正交STBC(SM-OSTBC)，提供了更高的频谱效率。文中还给出了一种简单而系统的色散矩阵构造方法，该方法保证了DA-QSM方案除$P=Q和$P=FRAC{Q}{2}两种配置外均能达到2的发射分集阶数，并且DA-QSM方案可以适用于任意数目大于3的发射天线。此外，还进行了性能分析，并给出了仿真结果。
In this paper, motivated by the recent concept of quadrature spatial modulation (QSM), we propose a diversity-achieving QSM (DA-QSM) transmission scheme. In the proposed scheme, two sets of dispersion matrices are employed, and $P$ out of $Q$ dispersion matrices are activated in each set. Then the two groups of $P$ selected dispersion matrices are linearly combined with the real and imaginary parts of $P$ phase-shift keying/quadratic-amplitude modulation constellation symbols, respectively. Due to employing an extra combination of dispersion matrices indices, the proposed DA-QSM scheme provides higher spectral efficiency than the existing DA SM schemes, such as space-time block coded SM (STBC-SM) and spatially modulated orthogonal STBC (SM-OSTBC). Also, a simple and systematic method to construct the dispersion matrices is presented, which guarantees that the DA-QSM scheme can achieve the transmit diversity order of two except for two configurations of $P=Q$ and $P=\frac{Q}{2}$, and DA-QSM can be applied to an arbitrary number of transmit antennas larger than 3. Furthermore, the performance analysis is conducted and the simulation results are presented to show the performance improvement of the proposed DA-QSM scheme.