A Low-Complexity Detection Scheme for Generalized Spatial Modulation Aided Single Carrier Systems

Generalized spatial modulation (GSM), which combines spatial modulation (SM) and vertical Bell Laboratories layered space-time (V-BLAST), is a novel attractive multi-input multi-output (MIMO) technique. In this letter, a low-complexity near-optimal detection scheme is presented for GSM aided single carrier (SC) transmission over dispersive channels. Compared to the conventional partial interference cancellation receiver with successive interference cancellation (PIC-R-SIC), the proposed scheme offers a near maximum likelihood (ML) detection performance while avoiding complicated matrix operations, which allows it to exhibit a lower computational complexity. Simulation results show that the proposed scheme provides a considerable performance improvement compared to PIC-R-SIC, especially in rank-deficient channels scenarios.