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In this letter, a low-complexity iterative detector with frequency domainequalization is proposed for generalized spatial modulation (GSM) aided singlecarrier (SC) transmissions operating in frequency selective channels. Thedetector comprises three main separate tasks namely, multiple-inputmultiple-output (MIMO) equalization, active antenna detection and symbol wisedemodulation. This approach makes the detector suitable for a broad range ofMIMO configurations, which includes single-user and multiuser scenarios, aswell as arbitrary signal constellations. Simulation results show that thereceiver can cope with the intersymbol interference induced by severe timedispersive channels and operate in difficult underdetermined scenarios wherethe total number of transmitter antennas is substantially larger than thenumber of receiver antennas.

Frequency Domain Equalization for Single and Multiuser Generalized Spatial Modulation Systems in Time Dispersive Channels