Proximity Interaction Detection With Adaptive RF Power Feedback

The patent implements a feedback mechanism where the receiving object sends back its estimated distance and propagation condition assessment to the transmitting object. The transmitting object then adjusts its transmission power based on this feedback, creating a closed-loop system that continuously refines distance estimation accuracy while accounting for signal attenuation and propagation conditions.

The patent introduces an intermediary assessment of propagation conditions (line-of-sight vs. non-line-of-sight) that mediates between the raw signal power measurement and the final distance estimation. This intermediary step allows the system to account for signal attenuation and propagation effects, improving the reliability of distance estimates by selecting appropriate estimation methods based on propagation conditions.

The patent implements dynamic transmission power adjustment where the transmitting object varies its power level based on real-time feedback from the receiving object about distance and propagation conditions. This dynamic approach allows the system to use minimum power when objects are close and properly detected, while increasing power only when needed to maintain detection accuracy, thus optimizing energy consumption without sacrificing precision.

The patent changes the transmission power parameter dynamically based on assessed propagation conditions and measured distance. By adjusting this key parameter according to actual operating conditions rather than using a fixed power level, the system achieves both energy efficiency and maintained detection accuracy across varying scenarios.

The patent segments the distance estimation process into distinct phases: initial distance estimation by the receiving object, propagation condition assessment, feedback transmission, and power adjustment. This segmentation allows each phase to be handled independently with specialized algorithms, improving overall accuracy while organizing the complexity into manageable, modular components.

The patent implements self-service mechanisms where each object autonomously performs distance estimation and propagation condition assessment based on its own measurements, then shares this information with the other object. This self-service approach distributes the computational burden and protocol complexity across both objects rather than concentrating it in one object, making the enhanced accuracy achievable without excessive centralized complexity.