Sub-Terahertz Wireless System Using Dual-Polarized Generalized Spatial Modulation With RF Impairments

In this paper, we address a multiple-input multiple-output (MIMO) communication system based on generalized spatial modulation (GSM) and dual-polarized (DP) antennas in sub-TeraHertz (sub-THz) bands to improve the Spectral Efficiency (SE) while reducing correlation effect space occupancy. Moreover, joint Maximum Likelihood (ML) detector Modified Ordered Block Minimum Mean-Squared Error (MOB-MMSE) algorithm are proposed detect jointly complex symbols virtual bits conveyed by activated polarization transmit antenna combination index. MOB-MMSE can achieve near-ML performance with low complexity. The of DP-GSM over correlated Rayleigh/Rician fading indoor sub-THz channels is studied. Provided results show that robust effects under Rician channel. addition, an average bit-error probability (ABEP) upper bounding derived analyzed for channels. Since band suffers from many technological limitations severe RF-impairments such as output power important phase noise (PN), studied considering impairments. Dual Polarized Spatial Multiplexing (DP-SMX) Uni-Polarized GSM (UP-GSM) compared system. reveal order schemes QPSK outperforms UP-GSM. Besides, DP-SMX provide good up medium PN, which interesting bands, but reduce transceiver cost using lower number RF chains when used transmitter architecture RF-switching.