OBJECT TRACKING VIA RADIO REFLECTIONS

摘要

In one aspect, a reference transmit signal is distributed to each of one or more transmit antennas, and delayed by multiple different times before transmission from the transmit antennas. The reference transmit signal (or a delayed version of the reference signal) is also used at each of the receive antennas to determine propagation (time of flight) times reflecting from bodies from each of the transmit antennas to the receive antenna. In another aspect, locations of multiple objects are determined by iteratively (a) determining a location of a body based on determined propagation times between multiple transmitter-receiver pairs, and (b) having determined a location, effectively removing the effect of reflections from that location from the remaining signals.