Hi, I'm trying to learn about software defined radio, obviously, and writing the necessary code to do so - I like to prove concepts to myself by simulating them in Matlab, or Python. I run into trouble when it comes to control loops like PLLs and lately Poly Phase Filter Blocks - which I still don't really understand, because of the feedback and how to handle error and stability in code. I'd like to ultimately simulate PLLs, PFB, and Costa's loop in the time domain, with a stream of input samples going into the recovery block. By the way, I've seen some PLL tutorials on the internet, but they cheat by simulating it in the phase domain, that's not good enough, I want time domain! But right now, I'd like to learn about Poly Phase Filter Block Clock Recovery and perform a miniature simulation to learn it. Can anybody point me to some references and maybe some advice. I just pulled up the pfb_clock_sync code from the source and oh my god, I don't think I can hang. Any advice on how to start learning from the code too would be helpful. I have a B.S. in Electrical Engineering, and know a B.S. worth amount of RF, mainly Smith charts and matching, which won't help me here!
on 2016-06-21 10:30