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Precoder and Combiner Design for Generalized Spatial Modulation based Multiuser MIMO Systems

Farto, B. ; Pavia, J.P. ; Souto, N.S. ; Correia, A.

Precoder and Combiner Design for Generalized Spatial Modulation based Multiuser MIMO Systems, Proc Wireless Personal Multimedia Communications Symp. - WPMC, Okayama, Japan, Vol. , pp. 1 - 6, October, 2020.

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Abstract
Multiple input multiple output (MIMO) schemes
based on generalized spatial modulations (GSM) have been
widely considered as potential candidate techniques for nextgeneration wireless networks, as they can improve both spectral
and energy efficiency. In this paper we propose a multi-user
MIMO system, where a base station transmits precoded GSM
symbols to several receivers. In the adopted GSM approach,
multiple antennas transmit different high-level QAM symbols
simultaneously. The precoder is designed in order to remove
interference between users while an iterative algorithm is
applied at the receiver to accomplish single-user GSM detection.
Simulation results show that the presented GSM MU-MIMO
approach is capable to effectively exploit a large number of
transmit antennas deployed at the transmitter and also provide
performance gains over conventional MU-MIMO schemes withidentical spectral efficiencies.