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Receive Quadrature Reflecting Modulation for RIS-Empowered Wireless Communications

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journal contribution
posted on 02.06.2021, 11:29 by J Yuan, M Wen, Q Li, E Basar, GC Alexandropoulos, G Chen
In 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 the 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 counterpart without I/Q index modulation in terms of BER in the low signal-to-noise ratio region.

History

Author affiliation

School of Informatics

Version

AM (Accepted Manuscript)

Published in

IEEE Transactions on Vehicular Technology

Publisher

Institute of Electrical and Electronics Engineers (IEEE)

issn

0018-9545

eissn

1939-9359

Copyright date

2021

Available date

02/06/2021

Language

en