Compressive Sensing Multi-User Detection in Massive MIMO Systems with Spatial Modulation

In this chapter, we introduce an LS-SM-MIMO scheme for the multi-user uplink (UL), where each user adopting multiple AEs and a single RF chain invokes SM to increase the throughput. By using hundreds of AEs and a limited number of RF chains, i.e., adopting the hybrid MIMO architecture, the BS can efficiently serve multiple users while also reducing power consumption. However, due to the large number of AEs of multiple users and limited RFs at the BS, the multi-user signal detection problem here is a challenging high-dimensional under-determined problem. To address this challenge, we design a joint SM transmission scheme at the transmitter, and an SCS-based MUD at the receiver. Furthermore, we use the cyclic-prefix single-carrier (CPSC) technique to combat the multipath channels. Additionally, a receive AE selection is adopted to improve the performance over correlated Rayleigh-fading MIMO channels. By exploiting the intrinsically sparse features of the UL signals, the considered SCS-based MUD can reliably detect the UL signals with low complexity. Simulation results verify the advantages of the considered SCS-based MUD over its counterparts.