Multirate DPLL Model

This Simulink mdl-file is to simulate the spectrum for multirate Digital Phase Locked Loop.

The multirate digital phase locked loop structure is equivalent to a non-trivial high-order feedback control loop, comparing with the traditional trivial one, it separates the design of the high pass filter for VCO output from many low pass filters for DCOs inputs. This version 2 model uses the 2 digital loop filters, you can extend it to as many rates as you wish, just watch for the stability.