US Patent 11914064 Time-of-flight vehicle user localization distance determination

A method for localizing a user device using a Time-of-Flight (ToF) antenna array disposed on a vehicle, the method includes determining via a ToF localization controller, that a user device is positioned at a front region of a vehicle, calculating a distance to the user device from a combination of two ToF antennae of the ToF antenna array, and performing a 2-dimensional (2D) trilateration calculation. The method further includes evaluating a confidence metric value, determining a position of the user device based on the confidence metric value, and generating an unlock signal that unlocks a vehicle door.