Angle Doppler response using FFT
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ahmed hussain
am 14 Apr. 2020
Kommentiert: ahmed hussain
am 15 Apr. 2020
I m simulating a target at 45 degrees azimuth and with a certain doppler..I m using the following code to find angle doppler response...However, i get an error of 15 degrees in angle...
%% Beamforming and doppler processing
sigvol = zeros(fs*pri,128,128);
sigvol1 = sigvol;
tcsig1 = zeros(fs*pri,N,M);
for i = 1:300
temp1 = shiftdim(tsig(i,:,:));
temp2 = fftshift(fft(temp1,128,1),1); %% doppler processing
temp3 = fftshift(fft(temp2,128,2),2); %%beamforming
sigvol(i,:,:) =temp3 ;
end
ad = pow2db(abs(squeeze(sigvol(128,:,:))));
figure(2)
angle_axis = linspace(-90,90,128);
doppler_axis = -prf/2:prf/128:(prf/2)-(prf/128);
imagesc(angle_axis,doppler_axis,ad.');
colormap(jet)
colorbar
xlabel('Angle')
ylabel('Doppler')
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Akzeptierte Antwort
Honglei Chen
am 15 Apr. 2020
I notice that you are using 128th range gate for plotting. Are you sure you have the correct target there? You can try to verify the result with what returned from phased.AngleDopplerResponse in Phased Array System Toolbox.
HTH
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