Patent ID: 11874395
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. A system comprising:
transmission circuitry configured to transmit a first radar signal that includes a set of chirps;
a set of receive antennas;
receiver circuitry coupled to the set of receive antennas and configured to receive a second radar signal based on the first radar signal, wherein the receiver circuitry is configured to determine a time series of beat samples of the second radar signal for each antenna of the set of antennas; and
a signal processor coupled to the receiver circuitry and configured to:
for each time series of beat samples associated with a respective receive antenna of the set of receive antennas:
perform a range Fast Fourier Transform (FFT) on the time series of beat samples to determine a set of range bin values for each chirp of the set of chirps; and
for each group of corresponding range bin values extending across the sets of range bin values:
determine an average value of the group; and
adjust each range bin value in the group based on the average value to produce sets of adjusted range bin values;

wherein the sets of adjusted range bin values for each antenna form an array of adjusted range bin samples for the set of chirps and the set of receive antennas, and
perform object detection for the second radar signal based on the array of adjusted range bin samples.