Hands-On Experience with UWB : Angle of Arrival Accuracy Evaluation in Channel 9

This paper evaluates IEEE 802.15.4z standard- compliant NXP SR040 and SR150 chips in Angle of Arrival (AoA) capabilities in Channel 9 (7.737—8.237 GHz) of the Ultra-WideBand (UWB) spectrum. Due to the shorter wavelength, higher frequencies may encounter certain limitations when it comes to harsh environments, as more reflections and multipath propagation can occur. Furthermore, they also can be affected by their enclosure used to protect the electronics in such an environment, which needs to be taken into account during product design. This work presents the results of the evaluation measurement scenario relatable to real-life use cases and concludes potentially valuable insight important for consideration when creating a new UWB product. Besides a basic overview of the theoretical estimation of AoA by Time Difference of Arrival (TDoA) and Phase Difference of Arrival (PDoA), and the evaluation of the corresponding results, the main contribution is the repeatable topology considered for the conducted measurements. The presented results allow vendors to compare their solutions with the various radio chips or antenna configurations.acceptedVersionPeer reviewe

Experimental Platform for Sensor Fusion Positioning Methods Evaluation

Position and context awareness is becoming greater in importance as one of the key enablers of the Industry 4.0 concept, with impact on analysis and optimizing production processes, their direct control, increasing and ensuring the safety of personnel and technology, as well as enabling traceability of products. There are many approaches to achieve a real-time location system (RTLS) capable of providing positioning data, yet each approach usually has its limits given by the physical principles of technology which it is primarily based on; mostly a wireless signal transmission where the performance boundaries lay in non-line-of-sight (nLoS) scenarios. Current literature already presents various approaches capable of dealing with these shortcomings and presents various combinations of sensors based on different phenomena, the drawbacks of which are mutually compensated, known as sensor fusion. This work presents practical design of a compact platform, which utilizes Ultra-WideBand (UWB) as one of the predominant wireless technologies for wireless positioning with with IEEE 802.15.4z compliant radio integrated circuits in cooperation with a 9-axis absolute orientation sensor, expandable with add-on boards