Re: [Discuss-gnuradio] Merge multiple complex streams

[Marcus D. Leech]

On 05/13/2014 03:02 PM, Imre wrote:
> (Something went wrong with my mails, hopefully doing it right now, sorry
> Mike, replied directly to you)
>
> Using Mike's example and some fiddling around:
>
> http://www.livep2000.nl/code/grc/multichannel_input.grc
>
> Tuning on a FM channel shows the mentioned mess,
> interconnect the hardware clock? Maybe like this:
>
> http://lists.gnu.org/archive/html/discuss-gnuradio/2013-09/msg00387.html
>
> I'am give the polyphase synthesizer a look
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> --
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All you channels will not only need to be phase-coherent, but also have 
zero phase offset.  That's the only way you can reasonably simulate
  having much wider bandwidth by "gluing together" a bunch of smaller 
bandwidths.

My own experiments with the RTLSDR gear is that achieving phase 
coherence across significant bandwidth appears to not be possible, even
  with a common, high-quality master clock.