Hi, I m trying to realise QPSK trasmission shown in the tutorial of Tom Rondeau available in this link http://www.trondeau.com/storage/grcon12/rondeau-mpsk_tutorial.pdf I meet problem when i try to add the vector of taps in the polyphase clock sync. I followed the example by creating a variable named *rrc_taps* and value of *firdes.root_raised_cosine* to obtain directly the coefficients but i still have error that the polyphase clock sync taps should by a float vertor. I think that the problem is the definition of the function *firdes.root_raised_cosine* which provide filter taps. Have you any propositions for me? Thanks for your help Zakaria
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