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Precoding for RIS-Assisted Multi-User MIMO-DQSM Transmission Systems

Author

Listed:
  • Francisco R. Castillo-Soria

    (Department of Telecommunications, Faculty of Science, Universidad Autonoma de San Luis Potosi, San Luis Potosi 78210, Mexico
    These authors contributed equally to this work.)

  • J. Alberto Del Puerto-Flores

    (Facultad de Ingeniería, Universidad Panamericana, Álvaro del Portillo 49, Zapopan 45010, Mexico
    These authors contributed equally to this work.)

  • Cesar A. Azurdia-Meza

    (Department of Electrical Engineering, Universidad de Chile, Santiago 8370451, Chile
    These authors contributed equally to this work.)

  • Vinoth Babu Kumaravelu

    (Department of Communication Engineering, School of Electronics Engineering, Vellore Institute of Technology, Vellore 632014, India
    These authors contributed equally to this work.)

  • Jorge Simón

    (Catedras CONACYT, Unidad Academica de Ingenieria Electrica, Universidad Autonoma de Zacatecas, Zacatecas 98000, Mexico
    These authors contributed equally to this work.)

  • Carlos A. Gutierrez

    (Department of Telecommunications, Faculty of Science, Universidad Autonoma de San Luis Potosi, San Luis Potosi 78210, Mexico
    These authors contributed equally to this work.)

Abstract

This paper presents two precoding techniques for a reconfigurable intelligent surface (RIS)-assisted multi-user (MU) multiple-input multiple-output (MIMO) double quadrature spatial modulation (DQSM) downlink transmission system. Instead of being applied at the remote RIS, the phase shift vector is applied at the base station (BS) by using a double precoding stage. Results show that the proposed RIS-MU-MIMO-DQSM system has gains of up to 17 dB in terms of bit error rate (BER) and a reduction in detection complexity of 51% when compared with the conventional MU-MIMO system based on quadrature amplitude modulation (QAM). Compared with a similar system based on amplify and forward (AF) relay-assisted technique, the proposed system has a gain of up to 18 dB in terms of BER under the same conditions and parameters.

Suggested Citation

  • Francisco R. Castillo-Soria & J. Alberto Del Puerto-Flores & Cesar A. Azurdia-Meza & Vinoth Babu Kumaravelu & Jorge Simón & Carlos A. Gutierrez, 2023. "Precoding for RIS-Assisted Multi-User MIMO-DQSM Transmission Systems," Future Internet, MDPI, vol. 15(9), pages 1-18, September.
    • Handle: RePEc:gam:jftint:v:15:y:2023:i:9:p:299-:d:1231576
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    References listed on IDEAS

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    1. Faisal Alanazi, 2021. "Intelligent reflecting surfaces with energy harvesting for Nakagami fading channels," Telecommunication Systems: Modelling, Analysis, Design and Management, Springer, vol. 78(3), pages 351-361, November.
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