Costas Loop oscillates in ModelSim while locks in MATLAB!

--- Quote Start ---

If you want a tricky solution then avoid loop altogether and do the following:

apply a known tx symbol pattern at start. Try detect it at Rx. Keep moving phase offset until you get it. That is all.

In practice this trick wouldn't work or I will have patented it since frequency needs lock as well.

--- Quote End ---

Eventually I am going to attach RF Front-End and receive the signal... plus, this is a graduation project as you know and I can't trick professors :D Although they might not know anything but I really want to do it for the sake of self satisfaction :)