Re: [Discuss-gnuradio] Regarding gen_interpolator_taps

[Marcus Müller]

Hi Kiran,

Even though I have GNURadio built with pybombs, I don't see the gen_interpolator_taps binary anywhere such that I can run it and generate new taps

That's right, it doesn't seem like gen_interpolator_taps.c is ever converted to an executable. There's an easy reason for that: Noone ever cared to include that in any CMake files, so that it would be built.
The reason for that "sloppiness" might just that it requires fortran to build, and unless you really really want to play around with these taps, you probably don't want that tool anyways.

So the "easy" fix to this is:
(0. kindly dwell in the fact that this somehow reminds you of working with LAPACK)
1. install gfortran
2. in the gen_interpolator_taps directory:
gcc -c gen_interpolator_taps.c
gcc -c simpson.c
gcc -c objective_fct.c
gfortran -o gen_interpolator_taps *.o praxis.f
3. run gen_interpolator_taps

Best regards,
Marcus

On 29.07.2015 16:26, Kiran Karra wrote:

Hello,
I have an application where I would like to use the mmse_fir_interpolator.  Looking in the code, it looks like the interpolator taps are located in the file gr-filter/include/gnuradio/filter/interpolator_taps.h and these taps are generated with the program gen_interpolator_taps.  Looking in the source of gr-filter, there exists the C file gr-filter/lib/gen_interpolator_taps/gen_interpolator_taps.c

Even though I have GNURadio built with pybombs, I don't see the gen_interpolator_taps binary anywhere such that I can run it and generate new taps.  I want to generate new taps because I want to experiment with the NSTEPS and NTAPS variables for my application.  It wasn't immediately clear to me how to build the gen_interpolator_taps binary, so I'm wondering if anybody has some advice regarding that?

Thanks,
Kiran

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