US 11,835,649 B2
Method and apparatus for radar signal processing using convolutional neural network
Jong Il Kim, Yongin-si (KR)
Assigned to SMART RADAR SYSTEM, INC., Seongnam-si (KR)
Filed by SMART RADAR SYSTEM, INC., Seongnam-si (KR)
Filed on Jun. 28, 2019, as Appl. No. 16/457,834.
Prior Publication US 2020/0408880 A1, Dec. 31, 2020
Int. Cl. G01S 7/41 (2006.01); G01S 7/35 (2006.01); G01S 13/34 (2006.01); G01S 13/58 (2006.01)
CPC G01S 7/417 (2013.01) [G01S 7/352 (2013.01); G01S 7/356 (2021.05); G01S 13/345 (2013.01); G01S 13/584 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for radar signal processing, the method comprising:
a first Fourier transform operation to perform a Fourier transform on a frequency modulated continuous wave (FMCW) digital radar signal including N pulse repetition intervals (PRIs) at every PRI to generate range data, which indicates range-index-specific coefficient values;
a convolutional neural network (CNN) processing operation to input two-dimensional window data obtained by accumulating one-dimensional data consisting of a range index of interest and range data corresponding to a nearby range index on a time axis of the PRI to a CNN circuit and to output, from the CNN circuit, a probability of an existence of a target in the range index of interest;
a target selection operation to select first range indices each having a target existence probability equal to or higher than a predetermined value among the range indices, wherein the range indices further comprise second range indices each having a target existence probability lower than the predetermined value;
a second Fourier transform operation to perform a Fourier transform on range data of the first range indices, selected by the target selection operation, each having a target existence probability equal to or higher than the predetermined value, wherein the second Fourier transform operation is not performed for the second range indices each having a target existence probability lower than the predetermined value; and
an output operation to output ranges and speeds of selected targets.