Re: Software PLL (SPLL)

Started by Ron N. February 8, 2006
Tim Wescott wrote:
> Implementing a PLL in software uses the same basic theory as > implementing a PLL in hardware -- you compare your synthesized signal to > a reference, generate a phase difference, then servo the frequency of > your synthesized signal to your reference.
Why? Isn't a software PLL just a forward interpolator. Why not just estimate (statistical, FFT, phase vocoder or otherwise) the frequency, phase, derivatives of phase, etc.; generate a forward interpolation of the input reference using that information, and call that the output of the PLL NCO? Recalculate periodically (every sample if the compute power is available). rhn A.T nicholson d.0.t C-o-M