Re: [Discuss-gnuradio] fractional_interpolator_cc?

[Eric Blossom]

On Tue, Oct 21, 2008 at 10:34:14AM -0400, Brian Padalino wrote:
> On Tue, Oct 21, 2008 at 10:15 AM, Clark Pope <address@hidden> wrote:
> >
> > I'm not able to get this function to work correctly. I have it just 
> > connected between a snapshot file and an output file. I set the 
> > interpolation factor to 2.0 and the output file ends up half the size of 
> > the input file. It's like it is a decimation block instead of interpolation?
> 
> How does the rational resampler work out - or can you not represent
> the ratio as a rational number?
> 
> Are you calling it correctly?  It seems as if there is a phase shift
> as well as an interpolation ratio being passed in.
> 
>     
> http://gnuradio.org/trac/browser/gnuradio/trunk/gnuradio-core/src/lib/filter/gr_fractional_interpolator_cc.cc#L38
>     
> http://gnuradio.org/trac/browser/gnuradio/trunk/gnuradio-core/src/lib/filter/gr_fractional_interpolator_cc.cc#L67
> 
> There may be an issue here:
> 
>     
> http://gnuradio.org/trac/browser/gnuradio/trunk/gnuradio-core/src/lib/filter/gr_fractional_interpolator_cc.cc#L49
> 
> Might be upside down?

Definitely upside down.

Johnathan, can you please fix and add real QA code please?

Thanks,
Eric