Costas Loop

GNU Radio
1

Hi, I’m an italian student.
I’m studying about GnuRadio and Usrp.
I would like to know informations about Costas loop’s coefficients.
Alpha and Beta. Where can I find some inform

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2

2007/4/2, [email protected] [email protected]:

Hi, I’m an italian student.
I’m studying about GnuRadio and Usrp.
I would like to know informations about Costas loop’s coefficients.
Alpha and Beta. Where can I find some inform

Taken from the header file:

  • All settings max_freq and min_freq are in terms of radians per
    sample,
  • NOT HERTZ. Alpha is the phase gain (first order, units of radians
    per radian)
  • and beta is the frequency gain (second order, units of radians per
    sample per radian)

For a good theoretical and practical description of the parameters
look here: http://archive.chipcenter.com/dsp/DSP010531F1.html

Trond D.

3

Trond D. wrote:

  • and beta is the frequency gain (second order, units of radians per
    sample per radian)

For a good theoretical and practical description of the parameters
look here: http://archive.chipcenter.com/dsp/DSP010531F1.html

I also just updated the Doxygen comments for the Costas loop code. If
you build the documentation from the current trunk, it should provide
some more helpful information to using it.

Tom