CALTERAH | White Paper on UWB Sensing in IEEE 802.15.4ab

Ultra-Wideband (UWB) technology is evolving from a ranging-centric technology into a multi-function wireless technology integrating ranging, sensing, and short-range data communication. Before IEEE 802.15.4ab, most UWB radar applications were implemented as proprietary and isolated sensing functions, with limited support for multi-device coordination, standardized CIR reporting, and cross-vendor interoperability.

IEEE 802.15.4ab introduces standardized UWB sensing capabilities within the UWB MAC and PHY frameworks. These enhancements include standardized sensing roles and operating modes, coordinated sensing session and scheduling mechanisms, CIR reporting, frequency stitching, dedicated sensing packet formats and sequences, and sensing-oriented baseband pulse shape. Together, these capabilities provide a common foundation for coordinated UWB sensing systems with broader coverage, finer resolution, reduced blind zones and interference, and improved application scalability.

This white paper introduces the basic principles and current applications of UWB radar, analyzes the limitations of existing UWB radar solutions, and provides a systematic interpretation of the UWB sensing enhancements defined in IEEE 802.15.4ab. It further discusses how UWB sensing can enhance existing applications and enable new automotive and non-automotive scenarios, including in-cabin sensing, near-cabin interaction, parking assistance, mobility safety, smart-home monitoring, elderly care, and industrial safety.

Finally, this white paper presents Calterah’s One UWB Platform concept, demonstrating how multiple ranging, sensing, and data communication functions can share common UWB hardware and system resources. It also introduces Calterah UWB Parking Assist System (PAS) , developed on the Dubhe UWB platform with IEEE 802.15.4ab sensing capabilities, as a practical implementation of UWB sensing.

Keywords:

UWB sensing, IEEE 802.15.4ab, CIR, HRP-SDEV, frequency stitching, coordinated sensing, automotive sensing, Parking Assist System