1. Executive Summary

Achieving centimeter-level positioning with Bluetooth technology requires a fundamental rethinking of traditional approaches. While standard Bluetooth RSSI-based methods are limited to meter-level accuracy, this document outlines a comprehensive framework that combines cutting-edge signal processing, advanced antenna systems, and novel algorithms to push positioning precision to the 1-5 centimeter range.

Phase-Based AoA (Angle of Arrival) with Carrier-Phase Differential Enhancement

Bluetooth technology, ubiquitous in our daily lives, connects everything from wireless earbuds to smart home devices. Yet, beneath the surface of this convenient wireless communication lies a powerful and often misunderstood capability: Bluetooth sniffing. This technique, which involves intercepting and analyzing Bluetooth radio packets, presents a classic dual-use dilemma. For developers, it's an indispensable debugging tool; for privacy and security, it poses a significant potential threat.