Krasin Georgiev (@krasin)
May be the imput signal is the key - here is a spectrogram of the signal load test_data_3569.txt x = complex(test_data_3569(:,1), test_data_3569(:,2)); ...
It looks like only this part of the spectrum is preserved in the first part of the signal: plot(abs(fftshift(fft(x(1:8000), 15000)))); hold on plot(abs(fftshift(fft(x(8000:end),...
The Welch method is not the same as downsampling and averaging. Welch will keep the bandwidth and increase the width of the frequency bins. Downsampling and averaging...
Signals:u = [u1, u2, u3, u4]v = [v1, v2, v3]u can be represented as a matrixA = [u1, 0, 0 u2, u1, 0u3, u2, u1u4, u3, u20, u4, u30, 0, u4]Sou * v = A v
LinkedIn is owned by Microsoft but I don't think they are scanning third party emails. Any other connections?
Yes, the matched filter should be modified. The same way you are filtering the signal you need to filter the waveform used to create the matched filter. May be...
Hi Naumankalia,To produce a delayed chirp (with whatever delay you want) you need to:Delay the chirp, e g. instead of chirp(t, f0, T, f1) you need chirp(t...
Hi,Is the question about how to produce two delayed chirps or how to matched filter them or how to decide if the second chirp can be resolved?At small delays the...
Normally cross-correlation (matched filter) is enough to get the delays: cx = xcorr(x_rx, x_tx); cx = cx(length(x_rx):end); plot(db(cx)), ymax = max(db(cx)), ylim([ymax-40,...
In Matlab you have build in function for N-D FFT. The algorithm for the 2-D case is also described in Ch24 of The Scientist and Engineer's Guide to Digital Signal...
Thanks Dr. mike for the intuitive explanation. Still it should work if the signal is split into more than 4 blocks in which case the combination will not look so...
But there are no shifted sinks - just a single sinc that multiplies the whole sequence before chopping. Now I see that it will modify the spectrum of the signal...
Hi Lyons! In which section of your DSP book, chapter 13, I can find more information about WOLA? I can't discover such abbreviation there. The algorithm described...
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