Preliminary results of 5G direction of arrival estimation using in-situ calibration with USRP
Xhafa, Alda (Universitat Autònoma de Barcelona)
López Salcedo, José Antonio (Universitat Autònoma de Barcelona)
Seco Granados, Gonzalo (Universitat Autònoma de Barcelona)

Publicació:	CEUR-WS, 2023
Descripció:	11 pàg.
Resum:	The demand for high-precision location information in indoor positioning systems such as logistics, security, emergency etc. , has increased the use of 5G systems as an alternative technology solution to the satellite-based positioning technologies. The 5G mobile networks provide more accurate and reliable positioning location in conditions of obstacles and changes. In this paper, the direction of arrival has been used for these localization approach. A description of In-Situ calibration of linear array antennas to enable direction of arrival estimation with 5G signals is provided. Despite the widely employed antenna arrays in 5G to facilitate the measurement of the direction of arrival (DOA), its performance is often degraded by array errors. Therefore, having coherent phases, accurate array manifold response, and delay and frequency offset OFDM waveform correction is a mandatory requirement to perform direction of arrival estimation. We provide an experimental validation of the calibration process and evaluate the DoA estimation performance using measurement data. In addition, we present a comparison among the performance of DoA estimation without calibration, when only the calibration of RF channel error is performed and when the full calibration including the antenna error calibration is done. It is then demonstrated via real test with commercial hardware equipment that an average reduction of 40% for DOA estimation error can be achieved by the proposed In-Situ calibration.
Ajuts:	Agencia Estatal de Investigación PDC2021-121362-I00 Agencia Estatal de Investigación PID2020-118984GB-I00
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Publicat a:	CEUR workshop proceedings, Vol. 3434 (2023) , ISSN 1613-0073

Adreça alternativa: https://ceur-ws.org/Vol-3434/paper10.pdf

11 p, 615.6 KB

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