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Bi-Static Sensing f...
Bi-Static Sensing for Near-Field RIS Localization
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- Ghazalian, Reza (författare)
- Aalto-Yliopisto,Aalto University
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- Keykhosravi, Kamran, 1990 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Chen, Hui, 1992 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Wymeersch, Henk, 1976 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Jäntti, Riku (författare)
- Aalto-Yliopisto,Aalto University
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(creator_code:org_t)
- 2022
- 2022
- Engelska.
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Ingår i: GLOBECOM - IEEE Global Telecommunications Conference. ; , s. 6457-6462
- Relaterad länk:
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https://research.cha... (primary) (free)
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- We address the localization of a reconfigurable intelligent surface (RIS) for a single-input single-output multicarrier system using bi-static sensing between a fixed transmitter and a fixed receiver. Due to the deployment of RISs with a large dimension, near-field (NF) scenarios are likely to occur, especially for indoor applications, and are the focus of this work. We first derive the Cram´er-Rao bounds (CRBs) on the estimation error of the RIS position and orientation and the time of arrival (TOA) for the path transmitter-RIS-receiver. We propose a multi-stage low-complexity estimator for RIS localization purposes. In this proposed estimator, we first perform a line search to estimate the TOA. Then, we use the far-field approximation of the NF signal model to implicitly estimate the angle of arrival and the angle of departure at the RIS center. Finally, the RIS position and orientation estimate are refined via a quasi-Newton method. Simulation results reveal that the proposed estimator can attain the CRBs. We also investigate the effects of several influential factors on the accuracy of the proposed estimator like the RIS size, transmitted power, system bandwidth, and RIS position and orientation.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Telekommunikation (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Telecommunications (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Signalbehandling (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Signal Processing (hsv//eng)
Nyckelord
- RIS Localization
- Near-Field
- CRB
Publikations- och innehållstyp
- kon (ämneskategori)
- ref (ämneskategori)