Abstract
Precise distance estimation between a primary computing device and a pair of wireless earbuds is often limited by the unreliability of Received Signal Strength Indicator (RSSI) methods. This disclosure describes a method for a coordination framework for distance and orientation estimation using Bluetooth® Channel Sounding (CS). In this method, a secondary earbud acts as a passive listener to phase‑based ranging (PBR) exchanges between the primary device and a primary earbud. By sharing configuration parameters (e.g., timing and pseudorandom seeds) the secondary earbud sniffs signal exchanges to enable the primary device to mathematically calculate secondary distance measurements. Additionally, dual‑band operation is utilized to perform concurrent ranging in higher frequency bands, while multi‑antenna configurations support joint angle and distance estimation. These methods improve proximity verification for secure services and provide accurate head‑orientation data without total reliance on inertial measurement units.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Zand, Pouria and Kumar, Sunil, "Angular and Distance Estimation in Multi‑Antenna Wireless Communication Systems", Technical Disclosure Commons, ()
https://www.tdcommons.org/dpubs_series/9708