HOW CAN I BROADEN MY SIN SIGNAL
4 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
I need to plot a sin signal and analyse it using a spectrum analzer (periodogram) but i want to broaden the sin signal how is it possible??
3 Kommentare
Akzeptierte Antwort
raj
am 3 Apr. 2012
1 Kommentar
Walter Roberson
am 3 Apr. 2012
chirp signals do not have flat-topped peaks.
Anyhow, you marked the question as Accepted, so you have come up with an answer suitable for your purpose, right?
Weitere Antworten (5)
Rick Rosson
am 1 Apr. 2012
Multiply your sine wave by a narrow window function.
5 Kommentare
Walter Roberson
am 2 Apr. 2012
If that is your only requirement, then why are you not _allowed_ to multiply your sine wave by a narrow window function? What other restriction have been placed on the form of your solution?
Image Analyst
am 2 Apr. 2012
How about using conv() to convolve your perfect sine signal with some crazy kernel?
Honglei Chen
am 2 Apr. 2012
Are you just looking for a sin that does not fall on an exact frequency sampling point so on the graph it seems having some kind of leakage, like the code below does?
fs = 128;
N = 32;
f = 10;
t = (0:N-1)/fs;
x = sin(2*pi*f*t);
Nfft = 128;
plot((0:Nfft-1)/Nfft*fs,abs(fft(x,Nfft)))
This doesn't really broaden your sin signal though.
0 Kommentare
Rick Rosson
am 2 Apr. 2012
Hi Raj,
We are not mind readers, and we are not really interested in pulling teeth to figure out what you need. Please tell us exactly what you are trying to do, why you want to do it a certain way, and what specific constraints or restrictions you are facing.
Also, if you have any MATLAB code that you have started developing, please post it and ask us specific questions related to your code.
Thanks!
Rick
1 Kommentar
Walter Roberson
am 2 Apr. 2012
For example are you looking for the equivalent of a zero-order hold but applied in the frequency domain ?
Siehe auch
Kategorien
Mehr zu Spectral Measurements 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!