Hi time-nuts, a PLL takes the phase difference of the incoming signal and the synthesized signal and feeds that in a loop filter. The output of the loop filter is used to steer the local oscillator.
In my setup I have an incoming complex signal and my local oscillator is generating a complex signal as well. So calculation of the phase difference is just the quotient of the incoming signal and the local oscillator, it is a sampled system. I take the quotient, calculate the angle using the atan function and then I feed it in the loop filter, a PI controller. The output of the loop filter is converted to a complex phase increment for the local oscillator with the sin and cos function. Now I have to get rid of the atan, cos and sin functions. I am looking for a loop filter which takes the quotient of the incoming/synthesized signal as a complex value. The output of this loop filter should be the phase increment for the local oscillator. It should not use the angle of the complex value explicitly, as this will involve the atan/cos/sin functions. Is someone aware of such a loop filter? I surfed through Gardners' 'Phaselock Techniques' but did not find a hint. Thank you Detlef Schücker DD4WV _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
