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Re: [Discuss-gnuradio] rrc_taps filter coefficents problem in polyphase


From: Martin Braun
Subject: Re: [Discuss-gnuradio] rrc_taps filter coefficents problem in polyphase clock sync
Date: Wed, 19 Feb 2014 09:24:13 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0

On 02/18/2014 11:29 PM, zielalaoui wrote:
> 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

You'll have to post some code and the exact error messages in order for
us to help.

M




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