Help in understanding the Power Spectral Density estimates using FFT
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
skrowten_hermit
am 9 Okt. 2020
Kommentiert: skrowten_hermit
am 9 Okt. 2020
psdx(2:end-1) = 2*psdx(2:end-1);
I couldn't quite get why only the indices 2 to last but one is taken i.e, first and last indices are discarded.
It would be great if anyone could help me understand why this is being done.
0 Kommentare
Akzeptierte Antwort
Mathieu NOE
am 9 Okt. 2020
hi
the explanation is just above
Zero frequency (DC) and the Nyquist frequency do not occur twice.
thats why the factor 2 on the psdx amplitude does not apply to indice "1" and "end"
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Parametric Spectral Estimation finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!