I am using AWR 1843 BOOST FMCW radar. I obtained the raw data and processed it to get the range doppler matrix. I am now trying to get the 3D point cloud using FFT. In my setup, the vertual antennas 1-4,9-12 correspond to the azimuth and antennas 5,6,7,8 correspond to the elevation. If i perform the fft along the third dimention for antennas 1-4,9-12 I get the 2D point cloud with azimuth information. This is stored in theta
Now to get the elevation angle, I have the range doppler matrix arranged in the following format
elevation_fft = cat(3,RDmap_cmpx(:,:,5),RDmap_cmpx(:,:,6),RDmap_cmpx(:,:,7),RDmap_cmpx(:,:,8),RDmap_cmpx(:,:,3),RDmap_cmpx(:,:,4),RDmap_cmpx(:,:,9),RDmap_cmpx(:,:,10));
i perform fft over elevation_fft whose size is 512*64*8 across the this dimention and convert to cartesian coordinates using this formula
xdata(i) = r_vect*cos(deg2rad(theta))*cos(deg2rad(phi));
ydata(i) = -r_vect*cos(deg2rad(theta))*sin(deg2rad(phi));
zdata(i) = r_vect*sin(deg2rad(theta));
I get meaning less elevation point cloud when I plot this.
How do I consider the antenna order for elevation fft? What am I doing wrong here?
