Delay Estimation for Ranging and Localization Using Multiband Channel State Information
Autor: | Alle-Jan van der Veen, Tarik Kazaz, Gerard J. M. Janssen, Jac Romme |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
Signal Processing (eess.SP)
Mean squared error Computer science Aperture Wireless network Applied Mathematics Ranging IEEE 802.11be super resolution ranging Computer Science Applications Data model Channel state information Delay estimation Bandwidth (computing) FOS: Electrical engineering electronic engineering information engineering Electrical and Electronic Engineering subspace fitting Electrical Engineering and Systems Science - Signal Processing multiband CSI Algorithm WiFi-7 Communication channel OFDM Computer Science::Information Theory |
Zdroj: | IEEE Transactions on Wireless Communications, 21(4) |
ISSN: | 1536-1276 |
Popis: | In wireless networks, an essential step for precise range-based localization is the high-resolution estimation of multipath channel delays. The resolution of traditional delay estimation algorithms is inversely proportional to the bandwidth of the training signals used for channel probing. Considering that typical training signals have limited bandwidth, delay estimation using these algorithms often leads to poor localization performance. To mitigate these constraints, we exploit the multiband and carrier frequency switching capabilities of wireless transceivers and propose to acquire channel state information (CSI) in multiple bands spread over a large frequency aperture. The data model of the acquired measurements has a multiple shift-invariance structure, and we use this property to develop a high-resolution delay estimation algorithm. We derive the Cram\'er-Rao Bound (CRB) for the data model and perform numerical simulations of the algorithm using system parameters of the emerging IEEE 802.11be standard. Simulations show that the algorithm is asymptotically efficient and converges to the CRB. To validate modeling assumptions, we test the algorithm using channel measurements acquired in real indoor scenarios. From these results, it is seen that delays (ranges) estimated from multiband CSI with a total bandwidth of 320 MHz show an average RMSE of less than 0.3 ns (10 cm) in 90% of the cases. Comment: 16 pages, 17 figures, 2 tables, journal |
Databáze: | OpenAIRE |
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