How to use periodogram in Matlab ?

[Holgi]

Hi !!

I try to analyse a Buetooth signal with a periodogram.
How are the values of the periodogram normalized ?
How does this values depends on the sample frequency ?

Thanks

Holgi

 

[Lewish]

These are not Matlab questions?

Search the web for Bluetooth and your questions.

 

[Holgi]

Hi !!!
My Problem ist not ne Bluetooth singnal, my problem is matlab and the periodogram function. How to use it...


Holgi

 

[Lewish]

Hi Holgi, have you read the Matlab help file about the periodogram function? Do you understand that this is a statistics function?

More info = more help.

 

[MikeyP]

Type "help psd". It gives information about the scaling in the help file.

M

 

[yekaiming]

hi, it is a little bit tricky when one is going to use this periodogram function. For example, if your signal has a 1000Hz sampling frequency, you will have to present the time-frequency map produced by periodogram function within [0, 500]Hz according to Nyquist theorem. However, periodogram function gives you a time-frequency representation within [0, 1000]Hz. So, you will have to cut it so as to get what is useful. For details, please check the matlab help file. I could not remember exactly at this time. But I did use this function for a quite long time. Good luck!