Tags: alli, calculation, content, density, fmax, frequency, limited, matlab, nyquist, power, programming, sampled, signal, spectral, theare, thesignal

power spectral density calculation

On Programmer » Matlab

2,487 words with 3 Comments; publish: Wed, 30 Apr 2008 21:19:00 GMT; (20046.88, « »)

Hi all:

I have a signal x(t) with limited frequency content, up to Fmax. The

signal has been sampled with frequency Fs > Nyquist frequency. The

are a lot of sample points available (like 10 millions). Could you

explain how can I calculate the spectral density of this signal.

Thanks in advance.

Jason

All Comments

Leave a comment...

  • 3 Comments
    • jason wrote:

      > Hi all:

      > I have a signal x(t) with limited frequency content, up to Fmax. The

      > signal has been sampled with frequency Fs > Nyquist frequency. The

      > are a lot of sample points available (like 10 millions). Could you

      > explain how can I calculate the spectral density of this signal.

      The easy answer is that you check out the matlab documentation

      of the function PWELCH and relatives in the signal processing

      toolbox.

      >From the amount of data, it sounds like you are involved

      in some project outside courses or class. If that's the case,

      I'd suggest you get a text on spectrum estimation and start

      reading. There are too many pitfalls to look out for, to get

      the full picture from USENET.

      My favourite book on the subject is

      Kay: "Modern Spectral Estimation and Applications"

      Prentice-Hall, 1988

      Rune

      #1; Wed, 30 Apr 2008 21:21:00 GMT
    • Hi,

      I am stuck up with the same problem. Did you find any solution. I

      have to give the power response of any signal inputted by the user.

      If you found anything, please give the coding.

      Thanks,

      Supreet

      jason wrote:

      >

      > Hi all:

      > I have a signal x(t) with limited frequency content, up to Fmax.

      > The

      > signal has been sampled with frequency Fs > Nyquist frequency.

      > The

      > are a lot of sample points available (like 10 millions). Could you

      > explain how can I calculate the spectral density of this signal.

      > Thanks in advance.

      > Jason

      #2; Wed, 30 Apr 2008 21:22:00 GMT
    • If you go to Google Groups and search in the comp.soft-sys.matlab

      archives using

      power spectral density

      you will get ~ 186 hits

      if you add

      greg-heath

      you will get ~26 hits.

      Hope this helps.

      Greg

      Supreet wrote:

      > Hi,

      > I am stuck up with the same problem. Did you find any solution. I

      > have to give the power response of any signal inputted by the user.

      > If you found anything, please give the coding.

      > Thanks,

      > Supreet

      > jason wrote:

      #3; Wed, 30 Apr 2008 21:23:00 GMT