Bluetooth High-Precision Positioning Base Station Development for Multi-Brand Devices

1. System Architecture Design

1.1 Technology Selection

• Positioning Technology: Bluetooth 5.1+ AoA/AoD Angle Detection + RSSI Distance Estimation

• Main Controller: Nordic nRF52833/nRF5340(Bluetooth 5.1 Direction Finding Support)

• Positioning Algorithm: Kalman Filter-Fused Trilateration Algorithm

• Communication Protocols: iBeacon, Eddystone, Custom Protocol

• Base Station Design: TDoA(Time Difference of Arrival) Base Station Array

Fluid Antenna is a paradigm-shifting technology in electromagnetics that utilizes electrically conductive fluids—such as liquid metals, ionic solutions, or ferrofluids—as the active radiating element. Its core principle is dynamic reconfigurability: by physically altering the fluid's shape, position, or distribution within a structure, key antenna parameters like operating frequency, radiation pattern, and polarization can be tuned in real-time. This moves beyond the limitations of fixed-geometry, solid-conductor antennas.