[Discuss-gnuradio] FIR filter Interpolation vs Resampler

[Daniel Batista]

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