As the Internet of Things continues its rapid rollout across much of the globe,
geolocation and indoor positioning have become among the IoT’s most-used features.
One challenge to this optimistic outlook is that IoT devices require small batteries that
can supply power for 10 years or more, and current GPS solutions are particularly
power hungry. In addition, GPS fails to operate reliably indoors or in dense urban
environments. The main barriers for accurate 4G-based positioning have been
inaccurate antenna databases, non-synchronized networks, distortions due to Non-
Line-of-Sight (NLOS) radio propagation and, of course, high power consumption.
Current 4G positioning is only accurate to 20-200m, and still requires full-feature 4G/5G
chipsets that are too expensive and too high power for the majority of IoT applications.
The Ultra Low Power Geolocation for IoT project (ULPGP5) project team recognized the
need for a multi-signal receiver that combines GPS and 4G signals with cloud offloading to achieve low-power, high accuracy
indoor/outdoor positioning. Unlike other solutions, the detected 4G signals are not limited to the typical low-accuracy approach
of using the 4G base station cell ID. The team’s multi-pronged approach achieved high location accuracy: five-to-40 meters
typically, and within 70 meters in very challenging environments, such as underground parking garages. This solution is based on
advanced signal processing, and the prototype used an off-the-shelf software defined radio (SDR).
Link to video: https://www.youtube.com/watch?v=tFqnFp1T88U
Link to URL: https://www.eurocps.org/wp-content/uploads/2018/04/SAE-Fiches-IE02-39-%C2%B5LPGPS-with-Nestwave-Final.pdf