RF Distance Estimation Using Phase-Corrected Time of Flight

The patent applies preliminary action by pre-synchronizing clocks between transmitter and receiver before distance measurement. The system performs clock synchronization procedures prior to the actual time of flight measurement, ensuring that both devices operate with synchronized time references. This preliminary synchronization eliminates phase offsets and timing errors that would otherwise degrade measurement precision, allowing accurate distance determination without requiring complex real-time correction mechanisms.

The patent replaces the mechanical/physical measurement approach of signal attenuation analysis with an electromagnetic time-based measurement approach. Instead of analyzing signal strength degradation which is sensitive to propagation conditions, the system measures the time of flight of RF signals between synchronized devices. This substitution of measurement methodology eliminates sensitivity to signal attenuation variations caused by environmental factors, maintaining high precision across different propagation conditions.

The patent eliminates the need for complex correction algorithms by performing clock synchronization as a preliminary action before measurement. By ensuring clocks are synchronized in advance, the system prevents phase offsets from occurring during the actual measurement process, rather than requiring complex post-processing corrections. This approach maintains high measurement precision while keeping device complexity low, as the synchronization mechanism is simpler than continuous correction algorithms.