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- W3186011015 abstract "This letter investigates a wireless communication system deploying distributed reconfigurable intelligent surfaces (RISs). Existing works have assumed that perfect timing synchronization is available among all the cooperative RISs. For practical considerations, we first study cooperative reflection design for multi-RIS-aided communication systems taking into account timing synchronization errors. We aim to minimize the mean-squared error of the recovered data in the presence of timing offsets subject to the unit modulus constraints imposed on the phase shifts of the RISs. In order to handle this sophisticated nonconvex problem, we develop a computationally-efficient algorithm based on the majorization-minimization framework where the RIS phase shift matrices and the timing offset equalizer are respectively developed in a semi-closed form and a closed form. Numerical examples validate the improved performance of our proposed design compared with various schemes." @default.
- W3186011015 created "2021-08-02" @default.
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- W3186011015 date "2021-07-27" @default.
- W3186011015 modified "2023-09-23" @default.
- W3186011015 title "Cooperative Reflection Design with Timing Offsets in Distributed Multi-RIS Communications" @default.
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- W3186011015 doi "https://doi.org/10.48550/arxiv.2107.12717" @default.
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