Re: [Discuss-gnuradio] FIR filter Interpolation vs Resampler

[Carlos Alberto Ruiz Naranjo]

Ok, thank you ;)

2014-11-10 12:26 GMT+01:00 Marcus Müller <address@hidden>:

Hi Carlos,

this might get a little too theoretical to discuss it on the mailing list, thus I'd like to point you at the Readme [1] file referenced by the doxygen page, as I think it explains mu as fractional delay quite nicely.
The readme also references the book where the idea of the MMSE interpolator will be explained in more detail.

Best regards,
Marcus

[1] https://github.com/gnuradio/gnuradio/blob/v3.6.5/gnuradio-core/src/gen_interpolator_taps/README

On 11/10/2014 09:20 AM, Carlos Alberto Ruiz Naranjo wrote:

What is the exact meaning of the parameter mu?
http://gnuradio.org/doc/doxygen-3.6/classgr_1_1filter_1_1mmse__fir__interpolator__ff.html
I do not understand it :S

2014-11-07 12:25 GMT+01:00 Marcus Müller <address@hidden>:

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi Daniel,

because both introduce delays and the delay of one of these is 2
samples longer.

Greetings,
Marcus


On 07.11.2014 10:07, Daniel Batista wrote:

Hi

I derive the output of a signal, both to an Interpolating FIR
filter and Rational Resampler (in parallel) and then I connect them
to a Time Sink (with 2 inputs). I use the same interpolation factor
for both blocks (interpolation = 4). I also use in taps the same
rcc filter. In Time Sink plot I observe a time delay in these 2
signals. Does anyone know why this happens?

Thank you Daniel



_______________________________________________ Discuss-gnuradio
mailing list address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1

iQEcBAEBAgAGBQJUXKwNAAoJEAFxB7BbsDrLRXAH+wY+eHL7NaeJ3zGU4Dg438nc
zWwCf9zeOATF23UfQ3aSSmW3ZAder5nHcSdQAIGKjAMCjmPCKS1n3fBk17766Q+T
BlJUtXGdQnXBBg2bM87nlHdVZ30mfoMBCYoDN1gWp1GV9TTkDPB99epgC/JOQwaq
O0dSKun6ysIwg7MJnXYG6rf2bhc28C/cZ/mGazAPA04or4tDHXx9IIX8QTQXJppi
wfR5RJYB1u4kLYc/DZVzqW+TgqzhUlgRmMDlPPGr10SANacQpRzCzFbZaRm8uaiE
nfwFIyDQC7r7JlDs8+U8bTpqcfC/aAKFoZ/G1E6FVnvpcKOsembBATzQfdbt3Fo=
=aRAd
-----END PGP SIGNATURE-----

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio