Abstract
Global Navigation Satellite System (GNSS) constitutes the foremost provider for geo-localization in a growing number of consumer-grade applications and services supporting urban mobility. Therefore, low-cost and ultra-low-cost, embedded GNSS receivers have become ubiquitous in mobile devices such as smartphones and consumer electronics to a large extent. However, limited sky visibility and multipath scattering induced in urban areas hinder positioning and navigation capabilities, thus threatening the quality of position estimates. This work leverages the availability of raw GNSS measurements in ultra-low-cost smartphone chipsets and the ubiquitous connectivity provided by modern, low-latency network infrastructures to enable a Cooperative Positioning (CP) framework. A Proof Of Concept is presented that aims at demonstratingdesigned to demonstrate the feasibility of a GNSS-only CP among networked smartphones embedding ultra-low-costequipped with GNSS receivers. The test campaign presented in this study assessed the feasibility of a client-serverthe approach over 4 G/LTE network connectivity. Results demonstrated an overall service availability above 80%, and an average accuracy improvement over the 40% w.r.t. to the GNSS standalone solution.
Highlights
U P to 10 billion electronic devices with localization capabilities will populate the world by 2025 to satisfy the booming request for Location Based Services (LBS) [1]
The sensing of the surrounding environment has become a relevant aid to the navigation and it can be accomplished through vision systems or through several exteroceptive sensors such as Ultra-Wide Band (UWB) units, Light Detection and Ranging (LiDAR) and Ultrasonic Ranging System (URS)
This test was chosen to assess the feasibility of the proposed CPA/CPS architecture dealing with raw measurements coming from identical devices co-located at the same reference location
Summary
U P to 10 billion electronic devices with localization capabilities will populate the world by 2025 to satisfy the booming request for Location Based Services (LBS) [1]. By coupling the disclosure of raw GNSS data in smartphones and tablets and the recent advances in communication networks (e.g. UltraReliable and Low-Latency Communications (URLLC) in 5G New Radio (NR)), the concept of networked GNSS receiver is expected to rise to mass-market and Internet of Things (IoT) applications [25] This trend enables the exchange and integration of satellite-based relative measurements among connected devices, the implementation of a number of CP solutions [21], [22]. The implementation of a local algorithm that manages both the near-real-time computation of inter-agent distances by combining local and external GNSS data, and their tight integration as auxiliary measurements in the positioning algorithm the validation of the proposed approach through an experimental test campaign which assessed the feasibility and the improved accuracy of the proposed CP scheme compared to standalone GNSS solutions.
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