SYSTEM AND METHOD FOR SENSING DISTANCE AND/OR MOVEMENT
First Claim
1. A method comprising:
- 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 including a first transmit pattern representative of a first sequence of digital bits;
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.
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Accused Products
Abstract
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.
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Citations
32 Claims
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1. A method comprising:
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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 including a first transmit pattern representative of a first sequence of digital bits; 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system comprising:
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a transmitter configured to generate an electromagnetic first transmitted signal that is communicated from a transmitting antenna toward a target object that is a separated from the transmitting antenna by a separation distance, the first transmitted signal including a first transmit pattern representative of a sequence of digital bits; a receiver configured to generate a first digitized echo signal that is based on an echo of the first transmitted signal that is reflected off the target object; and a correlator device configured to compare 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. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method comprising:
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transmitting a first transmitted signal having waveforms representative of a first transmit pattern of digital bits; generating a first digitized echo signal based on a first received echo of the first transmitted signal, the first digitized echo signal including waveforms representative of a data stream of digital bits; comparing a first receive pattern of digital bits to plural different subsets of the data stream of digital bits in the first digitized echo signal to identify a subset of interest that more closely matches the first receive pattern than one or more other subsets; and identifying a time of flight of the first transmitted signal and the first received echo based on a time delay between a start of the data stream in the first digitized echo signal and the subset of interest. - View Dependent Claims (29, 30, 31, 32)
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Specification