Dear All, I try to measure the phase difference between a delayed signal and a reference one. I use the following blocks: Multiply conjugate block (Inputs are the delayed and reference signals) Complex to Arg Moving Average The flowgraph works good when there is no noise. However when I add noise the variations are pretty wild.
These blocks constitute the basic structure of a PLL's phase comparator which should work under noisy Input conditions. What am I doing wrong?