The msresamp2 object implements a multi-stage half-band resampler use for efficient interpolation and decimation. Below is a code example demonstrating the msresamp2 interface. fig-filter-msresamp2 gives a graphical depiction in both the time and frequency domains of the multi-stage half-band resampler acting as an interpolator.

http://liquidsdr.org/doc/msresamp2/

resamp2 is a half-band resampler used for efficient interpolation and decimation. The internal filter of the resamp2 object is a Kaiser-windowed (see firdes_kaiser_window , section-filter-firdes ) with. This makes the filter half-band, and puts the half-power (6 dB) cutoff point at (one quarter of the sampling frequency).

http://liquidsdr.org/doc/resamp2/