Analysis of Concepts for Ultra Low Power Device Positioning Based on LEO Constellations

L. E. Aguado Bayón, M. Powe, K. Roll, B. Toz, A. Pérez Conesa

Abstract:	There is growing market for IoT-type network enabled ultra-low energy low-cost positioning devices, with multiple use cases ranging from asset trackers to geolocated locks. Despite improvements, GNSS chipsets used in many of these applications can be power hungry so that terrestrial-based positioning may be considered as an attractive alternative for all their limitations. However, innovative satellite concepts, and in particular emerging LEO systems, may help maintain space-based PNT as a preferred technology for ultra-low energy positioning. The aim of this analysis was to study, develop and evaluate the performance of innovative concepts for positioning devices intended for low-duty, multi-year deployments with minimal power usage and low cost. The work considered a wide range of aspects in an iterative down-selection analysis from general concepts and architectures, choice of processing algorithms, and device implementation. The goal was to demonstrate advantages to be had through these innovative concepts and concrete the case for space-based technologies (stand-alone or in combination with other technologies providing absolute or relative positioning) being at the core of the positioning mix for the IoT market. LEO navigation constellations, with the prospect to deliver higher power on ground than MEO GNSS, offer the potential for a navigation fix of a given accuracy using fewer receiver computational operations and lower energy consumption. The computational burden of a position fix is a complex function of numerous factors, including the received signal in space, the satellite constellation, observation type, signal processing design, prior knowledge (assistance) and use case. The objective of the study is to assess the performance of these innovative concepts and analyze the trade-off space against selected use cases representative of the IoT positioning applications, focused on 5 – 10 years’ timeframe. The concepts evaluated were benchmarked against reference scenarios and technologies representative of the state of the art.
Published in:	Proceedings of the 36th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2023) September 11 - 15, 2023 Hyatt Regency Denver Denver, Colorado
Pages:	2167 - 2190
Cite this article:	Bayón, L. E. Aguado, Powe, M., Roll, K., Toz, B., Conesa, A. Pérez, "Analysis of Concepts for Ultra Low Power Device Positioning Based on LEO Constellations," Proceedings of the 36th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2023), Denver, Colorado, September 2023, pp. 2167-2190. https://doi.org/10.33012/2023.19437
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