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IEEE
IEEE Systems Journal;2021;15;1;10.1109/JSYST.2020.2993704
Code index modulation (CIM)
direct-sequence spread-spectrum (DS-SS)
energy efficiency
index modulation (IM)
multiple-input multiple-output (MIMO) systems
quadrature spatial modulation (QSM)
spatial modulation (SM)
Generalized Code Index Modulation and Spatial Modulation for High Rate and Energy-Efficient MIMO Systems on Rayleigh Block-Fading Channel
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