| CPC G01S 15/8915 (2013.01) [G06V 40/1306 (2022.01)] | 19 Claims |
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1. A method for multipath reflection correction of acoustic signals received at an ultrasonic sensor, the method comprising:
receiving acoustic signals at the ultrasonic sensor over a time of flight range, wherein the acoustic signals comprise a primary signal contribution and a multipath reflection signal contribution;
determining characteristics of multipath reflection signals of received acoustic signals, wherein the characteristics of the multipath reflection signals of the received acoustic signals comprise a relationship of primary signal contributions to multipath reflection signal contributions for the acoustic signals received at the ultrasonic sensor at a plurality of times of flight for a plurality of locations of the ultrasonic sensor, and wherein the characteristics of the multipath reflection signals of received acoustic signals are based on correlations within the received acoustic signals identifying the multipath reflection signal contributions of the received acoustic signals;
comparing the characteristics of the multipath reflection signals of received acoustic signals to the received acoustic signals; and
determining the primary signal contribution and the multipath reflection signal contribution of the received acoustic signals at a plurality of times of flight of the time range based on the characteristics of the multipath reflection signals of received acoustic signals, wherein the primary signal contribution comprises the received acoustic signals corrected for the multipath reflection signals.
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