Constellation Design for Quadrature Spatial Modulation

Binh T. Vo, Ha H. Nguyen, H. Tuan
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引用次数: 4

Abstract

This paper considers constellation design for quadrature spatial modulation (QSM) to minimize the average probability of error. Different than the constellation design previously obtained for spatial modulation (SM), it is shown that, the error performance of QSM not only depends on the Euclidean distances between the amplitude-phase modulation (APM) symbols and the energies of APM symbols, but also on the in-phase and quadrature components of the QSM symbols. The analysis of the union bound of the average error probability reveals that at a very large number of transmit antennas, the optimal constellations for QSM converge to a quadrature phase-shift keying (QPSK) constellation. Simulation results demonstrate the performance superiority of the obtained constellations over the standard PSK and QAM constellations, as well as the constellations specifically designed for SM.
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正交空间调制星座设计
为使正交空间调制(QSM)的平均误差概率最小化,提出了星座设计方法。与以往空间调制星座设计不同的是,空间调制星座的误差性能不仅取决于幅相调制符号与幅相调制符号能量之间的欧氏距离,还取决于幅相调制符号的同相分量和正交分量。对平均误差概率的联合界分析表明,在发射天线数量非常大的情况下,QSM的最优星座收敛为正交相移键控(QPSK)星座。仿真结果表明,所得星座的性能优于标准PSK和QAM星座,也优于专为SM设计的星座。
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