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- W4285228049 abstract "It is challenging to precisely configure the phase shifts of the reflecting elements at the reconfigurable intelligent surface (RIS) due to inherent hardware impairments (HIs). In this letter, the mean square error (MSE) performance is investigated in an RIS-aided single-user multiple-input multiple-output (MIMO) communication system with transceiver HIs and RIS phase noise. We aim to jointly optimize the transmit precoder, linear received equalizer, and RIS reflecting matrices to minimize the MSE. To tackle this problem, an iterative algorithm is proposed, wherein the beamforming matrices are alternately optimized. Specifically, for the beamforming optimization subproblem, we derive the closed-form expression of the optimal precoder and equalizer matrices. Then, for the phase shift optimization subproblem, an efficient algorithm based on the majorization-minimization (MM) method is proposed. Simulation results show that the proposed MSE-based RIS-aided transceiver scheme dramatically outperforms the conventional system algorithms that do not consider HIs at both the transceiver and the RIS." @default.
- W4285228049 created "2022-07-14" @default.
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- W4285228049 date "2022-08-01" @default.
- W4285228049 modified "2023-10-11" @default.
- W4285228049 title "MSE-Based Transceiver Designs for RIS-Aided Communications With Hardware Impairments" @default.
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- W4285228049 doi "https://doi.org/10.1109/lcomm.2022.3179614" @default.
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