目前，以空间调制(Spatial Modulation，SM)、广义空间调制(Generalized Spatial Modulation，GSM)为代表的新型MIMO技术，成为4G以及5G的关键技术。空间调制系统在一个符号周期内，发送端只选择部分发送天线发送信号，从而大大提高了频谱效率，是大规模MIMO系统的重大突破。

空间调制核心技术的资料。可用于学习MIMO，以及空间调制的原理

空间调制英文文献，详细讲解原理Abstract—In this letter, we derive the optimal detector for the so-called spatial modulation (SM) system introduced by Mesleh et al. in [1]. The new detector performs significantly better than the original (~4 dB gain), and we support our results by deriving a closed form expression for the average bit error probability. As well, we show that SM with the optimal detector also achieves performance gains (~1.5−3 dB) over popular multiple antenna systems, making it an excellent candidate for future wireless communication standards. Index Terms—Antenna modulation, spatial modulation, maximum likelihood detection, MIMO.