I'm dealing with transformation of coordinates after I do the 3d FFT doa estimation.
Data below is a car in front of the radar board, and the angle of arrival is "0", 50m.
Left image is the row has the maximum value (50m) of right one.
How can I transform the x-axis which means sampling index to the DOA(degree) like right image?
According to the ti document: https://training.ti.com/sites/default/files/docs/mmwaveSensing-FMCW-offlineviewing_0.pdf
My parameters are:
lambda = c/fc, d = lambda/2
So the transformation should be: doa = arcsin(index/pi).
But it seems like the results are wrong.