Re: [Discuss-gnuradio] FUNCube dongle

[Alexandru Csete]

On Sun, Feb 20, 2011 at 10:50 AM, Patrik Tast <address@hidden> wrote:
> Hi Alexandu,
>
> Oh yes, by plugging it into an audio source it will work as is with GR.
>
> We wonder how to rip the I and Q's and pass them further to GR for
> (de)modulation
> We need to study the dongle and its ICs more
>

Not necessary, because we know that one channel contains the I samples
and the other channel contains the Q samples. In GNU Radio it can be
converted to a complex stream using gr_float_to_complex() see attached
screenshot. The complex stream can then be used the same was as you
would use a stream from USRP, except the the sample rate is 96 kHz.

Alex

grAudioToComplex.png
Description: PNG image