Angle Doppler response using FFT
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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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採用された回答
Honglei Chen
2020 年 4 月 15 日
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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