On the Performance of 3-D Spatial Modulation Over Measured Indoor Channels
Xusheng Zhu, Lei Yuan, Qingqing Li, Qiang Li, Long Jin, Jiliang Zhang
Abstract
In this paper, a measurement-based three-dimensional (3-D) spatial modulation (SM) system is first proposed in the existing literature. The major contributions of this work include: 1) a 3-D SM measurement system with a <inline-formula><tex-math notation="LaTeX">$\boldsymbol{16 \times 16}$</tex-math></inline-formula> virtual uniform rectangle array (URA) at the transmitter and a virtual uniform line array (ULA) with 16 elements at the receiver, 2) a comprehensive measurement activity indoors taking both line-of-sight (LOS) and none-LOS (NLOS) scenarios into account, and 3) the first measurement-based average bit error probability (ABEP) evaluation for 3-D SM system. Numerical results reveal that the widely used independent and identically distributed (i.i.d.) Rayleigh channel model significantly overestimates the performance of the SM system. Moreover, we find that the ABEP performance of 3-D SM is worse than that of the 2-D SM under the same spacing among the antenna array, while 3-D SM outperforms 2-D SM under the same size of the antenna array.