Polyphase Synthesizer gr_pfb_synthesizer_ccf from gnuradio import gr from gnuradio.gr import firdes gr.pfb_synthesizer_ccf( $numchans, $taps, $twox) self.$(id).set_channel_map($ch_map) set_taps($taps) set_channel_map($ch_map) Channels numchans 2 int Connections connections 2 int Taps taps real_vector 2x Sample Rate twox False bool Channel Map ch_map [] int_vector in complex $connections out complex