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fixed spectograms

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ti_mo
2026-05-20 10:16:46 +02:00
parent 1561016689
commit 2fa2bf7f9a
2 changed files with 11 additions and 11 deletions
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lab_3/task1.m
+10 -10
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@@ -17,22 +17,22 @@ duration4 = length(trace4.iq) / sample_rate;
% 2.
% get all four plot values
[~,F1,T1,P1] = spectrogram(trace1.iq, window, overlap, fft_precision, sample_rate, "centered", "power");
[~,F2,T2,P2] = spectrogram(trace2.iq, window, overlap, fft_precision, sample_rate, "centered", "power");
[~,F3,T3,P3] = spectrogram(trace3.iq, window, overlap, fft_precision, sample_rate, "centered", "power");
[~,F4,T4,P4] = spectrogram(trace4.iq, window, overlap, fft_precision, sample_rate, "centered", "power");
[S1,F1,T1] = spectrogram(trace1.iq, window, overlap, fft_precision, sample_rate, "centered");
[S2,F2,T2] = spectrogram(trace2.iq, window, overlap, fft_precision, sample_rate, "centered");
[S3,F3,T3] = spectrogram(trace3.iq, window, overlap, fft_precision, sample_rate, "centered");
[S4,F4,T4] = spectrogram(trace4.iq, window, overlap, fft_precision, sample_rate, "centered");
% begin calibrated color scale
P1_dB = 10 * log10(P1);
P2_dB = 10 * log10(P2);
P3_dB = 10 * log10(P3);
P4_dB = 10 * log10(P4);
P1_dB = 20 * log10(abs(S1).^2);
P2_dB = 20 * log10(abs(S2).^2);
P3_dB = 20 * log10(abs(S3).^2);
P4_dB = 20 * log10(abs(S4).^2);
all_P_dB = [P1_dB(:); P2_dB(:); P3_dB(:); P4_dB(:)];
% -50 to +50 so its like the example fig
p_dB_min = min(all_P_dB) - 50;
p_dB_max = max(all_P_dB) + 50;
p_dB_min = min(all_P_dB);
p_dB_max = max(all_P_dB);
% end power calibrated color scale
if ~calculations_only