In-Vehicle Wireless Device Distance Detection Calibration

The patent applies preliminary action by storing calibration information for each mobile terminal in advance. The calibration information includes the radio wave intensity characteristics specific to each terminal, which are obtained beforehand and stored in the storage unit. When distance detection is performed, this pre-stored calibration information is retrieved and used to correct the detected distance, thereby improving accuracy without adding complex real-time processing requirements.

The patent applies local quality by using terminal-specific threshold intensities instead of a single universal threshold. Each mobile terminal has its own calibration information stored in the storage unit, including a threshold intensity value that is specific to that terminal's radio wave characteristics. The determination unit retrieves the appropriate threshold based on the identified terminal, allowing each terminal to be evaluated against its own optimized threshold, thereby improving detection accuracy for each individual terminal while maintaining simple operation through automated lookup.

The patent applies taking out by extracting only the essential calibration parameters needed for accurate distance detection. The calibration information stored for each mobile terminal includes specifically the radio wave intensity characteristics and threshold intensity values that are critical for distance determination. By extracting and storing only these necessary parameters rather than comprehensive terminal profiles, the system achieves high detection accuracy while minimizing the quantity of stored information and associated processing requirements.