Re: [Discuss-gnuradio] how is interpolation rate dynamically set?

[Brian Padalino]

On Fri, Sep 26, 2008 at 4:00 PM, Bill Stevenson
<address@hidden> wrote:
> Hello, everybody!
>
> I am working on the demo file:
> gnuradio-examples/python/digital/benchmark_tx.py. In the file
> transmit_path.py, it is said "specify bitrate.  samples-per-symbol and
> interp/decim will be derived." How are interp/decim rate and
> samples-per-symbol derived respectively? what is the range for the variable
> interpolation rate? Is interpolation rate increased as a multiple of 4?
> could anyone tell me where i can find the dynamical range of interpolation
> rate?

Try the wiki:

    http://gnuradio.org/trac/wiki/UsrpFPGA#TransmitChain

The interpolating CIC filter, I believe, can handle integers in the
range [4,255].  The source can be found here:

    http://gnuradio.org/trac/browser/gnuradio/trunk/usrp/fpga/sdr_lib

Brian