[Discuss-gnuradio] Switching between simulated channels

[Aylons Hazzud]

I have been using GNURadio lately as a simulation library, kind of
expading SciPy for static analysis while making some real-time
analysis for parameter tweaks now and then. It's working great.

However, I have a problem I would like to solve better: I have a
switching data input, where the same data comes from two slightly
different channels (a block diagram can be seen here:
http://www.ohwr.org/attachments/2013/RFFE_Chain.png)

I want to simulate this channel in GNURadio/Scipy so I can rapidly
test new approaches for normalizing the inputs. My first thought would
be to simply simulate both channels, record the data, interleave them
using standard python/scipy tools, and use the resultant vector as a
source.

However, I believe there should be a better way to do this in
GNURadio. Is there any (out-of-tree?) "switching block", which could
demultiplex a signal to two different channels at a fixed rate (or
according to the value of an input signal), and the dual "mux  block"?

If there isn't, I would love if anyone could guide on how to build a
block like this, or point to a similar block from which I could get
inspiration to build mine. BTW, this would be my first GNURadio block
which isn't just a hierarchical block.

Thanks,
Aylons