SYSTEM AND METHOD FOR SENSING DISTANCE AND/OR MOVEMENT

摘要

A method (e.g., a method for measuring a separation distance to a target object) includes transmitting an electromagnetic first transmitted signal from a transmitting antenna toward a target object that is a separated from the transmitting antenna by a separation distance. The first transmitted signal includes a first transmit pattern representative of a first sequence of digital bits. The method also includes receiving a first echo of the first transmitted signal that is reflected off the target object, converting the first echo into a first digitized echo signal, and comparing a first receive pattern representative of a second sequence of digital bits to the first digitized echo signal to determine a time of flight of the first transmitted signal and the echo.

主权项

1. A method comprising:
transmitting a first electromagnetic signal toward a target object; receiving an echo of the first electromagnetic signal off of the target object; determining a time of flight of one or more of the first electromagnetic signal or the echo of the first electromagnetic signal by comparing a transmit sequence of digital bits representative of the first electromagnetic signal with a receive sequence of digital bits representative of the echo of the first electromagnetic signal; transmitting a second electromagnetic signal toward the target object; receiving an echo of the second electromagnetic signal off of the target object; determining a temporal misalignment between one or more waveforms representative of the echo of the second electromagnetic signal and one or more waveforms representative of the second electromagnetic signal that are time delayed from transmission of the second electromagnetic signal by the time of flight; and determining a distance to the target object based on a combination of the temporal misalignment and the time of flight.