Electronic devices with motion-based radio-frequency environment mapping

Abstract

An electronic device may include radio-frequency sensing circuitry that transmits sensing signals and that receives reflected signals using one or more antennas. The sensing circuitry may generate digital sensor data based on the reflected signals. The sensor data may be indicative of moving objects moving through positions that occlude lines of sight between the electronic device and stationary objects behind the moving objects. The sensor circuitry may detect the locations on the stationary objects based on changes to the sensor data associated with motion of the moving objects through the positions. The sensor circuitry may accumulate an environment map of the detected locations as the moving objects move about the environment over time. This may allow the sensor circuitry to generate the environment map with high spatial resolution using as few antennas as possible. The sensor circuitry may detect boundaries of the environment based on the environment map.