OFDM Frame Acquisition digital_ofdm_frame_acquisition from gnuradio import digital digital.ofdm_frame_acquisition($occupied_carriers, $fft_length, $cplen, $known_symbol, $max_fft_shift_len) Occupied Carriers occupied_carriers int FFT Length fft_length int CP Length cplen int Preamble known_symbol complex_vector Max FFT Shift max_fft_shift_len int in complex $fft_length flag byte $fft_length out complex $occupied_carriers flag byte