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Differential Reflecting Modulation for Reconfigurable Intelligent Surface Based Communications

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Document pages: 5 pages

Abstract: Reconfigurable intelligent surface (RIS) based communications have emerged asa new paradigm. This letter proposes a differential reflecting modulation (DRM)scheme for RIS based communication systems. In DRM, information bits arejointly carried by the activation permutations of the reflecting patterns andthe phases of the transmitted signals, leading to that DRM can work without anychannel state information (CSI) at the transmitter, RIS or receiver. In otherwords, DRM can release the intricate and resource-consuming channel estimationin the transmission process. Simulation results show that the proposed DRM paysan acceptable SNR penalty compared to non-differential modulation with coherentdetection.

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