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- W4290992022 abstract "<p>Reconfigurable intelligent surfaces (RISs) are a recent yet revolutionary development in communications systems. Particularly applicable to millileter wave (mmWave) systems, these surfaces can increase localization performance and decrease vulnerability to environmental influences, all by adjusting the incoming signals' phase. At the same time, manufacturing ideal hardware to be deployed at the transceivers is not feasible nor practical. These non-linearities in hardware, collectively known hardware impairments (HWIs), cause signal degradation and adversely affect localization. In this paper, the effect of HWIs on RIS-aided localization is examined. Towards that, the mean squared error (MSE) of the user's position is found through a maximum likelihood estimator (MLE) and its functionality is verified by the position error bounds (PEB), derived from Cramer-Rao lower bounds (CRLB). Our numerical results show that active RISs mitigate the deteriorating effect of HWIs on the user's PEB. Based on our outcome, increasing the inter-RISs space generally creates more resolvable paths and leads to improved localization. </p>" @default.
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- W4290992022 date "2022-08-11" @default.
- W4290992022 modified "2023-10-16" @default.
- W4290992022 title "RIS-Aided Mobile Localization Error Bounds Under Hardware Impairments" @default.
- W4290992022 doi "https://doi.org/10.36227/techrxiv.20431968" @default.
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