RADAR SENSOR
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United States of America Patent
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Issued Date -
May 16, 2024
app pub date -
Oct 31, 2023
filing date -
Nov 16, 2022
priority date (Note) -
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Abstract
A radar sensor comprising a chirp generator that is configured to provide radar signalling for transmission. The radar signalling comprises a sequence of radar chirps, and wherein each radar chirp has a chirp slope that defines the rate of change of frequency in the radar chirp. A mixer multiplies the transmitted radar signalling with a received, reflected version of the transmitted radar signalling in order to provide analogue intermediate frequency, IF, signalling. An ADC samples the IF signalling in order to generate digital signalling. A digital processor populates a 2-dimensional array of bin-values based on the digital-values, such that: a first axis of the 2-dimensional array is a fast time axis and a second axis of the 2-dimensional array is a slow time axis. A chirp slope frequency adjuster sets the chirp slope of the radar chirps based on an index in the sequence of radar chirps. The digital processor performs DFT calculations on the bin-values in the 2-dimensional array along the fast time axis and the slow time axis in order to determine the range and velocity of any detected objects.
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