Department of Electrical and Electronics Engineering2024-11-0920210018-954510.1109/TVT.2021.30731612-s2.0-85104633708http://dx.doi.org/10.1109/TVT.2021.3073161https://hdl.handle.net/20.500.14288/15589In this paper, we propose a novel reconfigurable intelligent surface (RIS)-based modulation scheme, named RIS-aided receive quadrature reflecting modulation (RIS-RQRM), by resorting to the concept of spatial modulation. In RIS-RQRM, the whole RIS is virtually partitioned into two halves to create signals with only in-phase (I-) and quadrature (Q-) components, respectively, and each half forms a beam to a receive antenna whose index carries the bit information. Furthermore, we design a low-complexity and non-coherent detector for RIS-RQRM, which measures the maximum power and polarities of the I- and Q- components of received signals. Approximate bit error rate (BER) expressions are derived for RIS-RQRM over Rician fading channels. Simulation results show that RIS-RQRM outperforms the existing counterparts without I/Q index modulation in terms of BER in the low signal-to-noise ratio region.EngineeringElectricalElectronicTelecommunicationsTransportation ScienceTechnologyJournal Article1939-9359659550300089Q111617