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• W3022941453 abstract "Photodiode (PD)-based Visible Light Positioning (VLP)-based localisation systems seem propitious for the low-cost tracking and route-configurable navigation of automated guided vehicles, found in warehouse settings. Delivering the required high accuracy, currently necessitates measuring and fitting the received power - distance relation. This paper shows that accurately modelling the PD receiver's angular characteristics obsoletes this calibrating fit, while still providing accurate positioning estimates. A new responsivity model Square (SQ) is proposed, which is a function of the square of the incidence angle rather than its cosine. Both its aptitude in matching real-life propagation and its associated localisation accuracy are verified using two extensive measurement sets, each detailing the propagation of a PD moving across a 2D plane 3 m below a 4-LED plane. SQ is compared to the responsivity and calibration fit models available in the literature. In conjunction with model-based fingerprinting positioning, SQ outscores the Lambertian and generalised Lambertian model in terms of the 90th percentile root-mean-square error (rMSE) p90 by 45.36 cm (83.1%) and 0.84 cm (8.4%) respectively for the non-Lambertian-like receiver. SQ exhibits an equivalent performance as the generalised Lambertian model for the Lambertian-like photodiode. Accounting for the appropriate receiver model can also boost trilateration's rMSE. A 50th percentile rMSE reduction of respectively 1.87 cm and 2.66 cm is found in the setup." @default.
• W3022941453 created "2020-05-13" @default.
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• W3022941453 date "2020-01-01" @default.
• W3022941453 modified "2023-10-17" @default.
• W3022941453 title "Impact of a Photodiode’s Angular Characteristics on RSS-Based VLP Accuracy" @default.
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• W3022941453 doi "https://doi.org/10.1109/access.2020.2991298" @default.
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