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Altera_Forum
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11 years ago

Costas Loop oscillates in ModelSim while locks in MATLAB!

Hello again, I have designed a Costas Loop in MATLAB and it simulates very well... locking and recovering the carrier. Here are the results: http://www.alteraforum.com/forum/attachment.php?...
Altera_Forum's avatar
Altera_Forum
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11 years ago

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.