#!/usr/bin/env python2 # -*- coding: utf-8 -*- ################################################## # GNU Radio Python Flow Graph # Title: SSTV PD120 Demodulation # Author: Sebastian Schumb (sebastian@sebastains-site.de) # Description: A PD120 SSTV demodulator # GNU Radio version: 3.7.13.5 ################################################## from gnuradio import analog from gnuradio import eng_notation from gnuradio import filter from gnuradio import gr from gnuradio.eng_option import eng_option from gnuradio.filter import firdes from optparse import OptionParser import math import osmosdr import satnogs import time class satnogs_sstv_pd120_demod(gr.top_block): def __init__(self, antenna=satnogs.not_set_antenna, bb_gain=satnogs.not_set_rx_bb_gain, decoded_data_file_path='/tmp/.satnogs/data/data', dev_args=satnogs.not_set_dev_args, doppler_correction_per_sec=20, enable_iq_dump=0, file_path='test.ogg', if_gain=satnogs.not_set_rx_if_gain, iq_file_path='/tmp/iq.dat', lo_offset=100e3, ppm=0, rf_gain=satnogs.not_set_rx_rf_gain, rigctl_port=4532, rx_freq=100e6, rx_sdr_device='usrpb200', waterfall_file_path='/tmp/waterfall.dat'): gr.top_block.__init__(self, "SSTV PD120 Demodulation") ################################################## # Parameters ################################################## self.antenna = antenna self.bb_gain = bb_gain self.decoded_data_file_path = decoded_data_file_path self.dev_args = dev_args self.doppler_correction_per_sec = doppler_correction_per_sec self.enable_iq_dump = enable_iq_dump self.file_path = file_path self.if_gain = if_gain self.iq_file_path = iq_file_path self.lo_offset = lo_offset self.ppm = ppm self.rf_gain = rf_gain self.rigctl_port = rigctl_port self.rx_freq = rx_freq self.rx_sdr_device = rx_sdr_device self.waterfall_file_path = waterfall_file_path ################################################## # Variables ################################################## self.samp_rate_rx = samp_rate_rx = satnogs.hw_rx_settings[rx_sdr_device]['samp_rate'] self.xlate_filter_taps = xlate_filter_taps = firdes.low_pass(1, samp_rate_rx, 125000, 25000, firdes.WIN_HAMMING, 6.76) self.taps = taps = firdes.low_pass(12.0, samp_rate_rx, 100e3, 60000, firdes.WIN_HAMMING, 6.76) self.max_modulation_freq = max_modulation_freq = 3000 self.filter_rate = filter_rate = 250000 self.deviation = deviation = 5000 self.audio_samp_rate = audio_samp_rate = 48000 ################################################## # Blocks ################################################## self.satnogs_waterfall_sink_0 = satnogs.waterfall_sink(audio_samp_rate, 0.0, 10, 1024, waterfall_file_path, 1) self.satnogs_tcp_rigctl_msg_source_0 = satnogs.tcp_rigctl_msg_source("127.0.0.1", rigctl_port, False, 1000/doppler_correction_per_sec, 1500) self.satnogs_sstv_pd120_sink_0 = satnogs.sstv_pd120_sink(decoded_data_file_path) self.satnogs_ogg_encoder_0 = satnogs.ogg_encoder(file_path, audio_samp_rate, 1.0) self.satnogs_iq_sink_0 = satnogs.iq_sink(32767, iq_file_path, False, enable_iq_dump) self.satnogs_coarse_doppler_correction_cc_0 = satnogs.coarse_doppler_correction_cc(rx_freq, samp_rate_rx) self.rational_resampler_xxx_0 = filter.rational_resampler_fff( interpolation=5263, decimation=12000, taps=None, fractional_bw=None, ) self.osmosdr_source_0 = osmosdr.source( args="numchan=" + str(1) + " " + satnogs.handle_rx_dev_args(rx_sdr_device, dev_args) ) self.osmosdr_source_0.set_sample_rate(samp_rate_rx) self.osmosdr_source_0.set_center_freq(rx_freq - lo_offset, 0) self.osmosdr_source_0.set_freq_corr(ppm, 0) self.osmosdr_source_0.set_dc_offset_mode(2, 0) self.osmosdr_source_0.set_iq_balance_mode(0, 0) self.osmosdr_source_0.set_gain_mode(False, 0) self.osmosdr_source_0.set_gain(satnogs.handle_rx_rf_gain(rx_sdr_device, rf_gain), 0) self.osmosdr_source_0.set_if_gain(satnogs.handle_rx_if_gain(rx_sdr_device, if_gain), 0) self.osmosdr_source_0.set_bb_gain(satnogs.handle_rx_bb_gain(rx_sdr_device, bb_gain), 0) self.osmosdr_source_0.set_antenna(satnogs.handle_rx_antenna(rx_sdr_device, antenna), 0) self.osmosdr_source_0.set_bandwidth(samp_rate_rx, 0) self.low_pass_filter_0_0 = filter.fir_filter_fff(1, firdes.low_pass( 1, 12000, 1500, 1000, firdes.WIN_HAMMING, 6.76)) self.low_pass_filter_0 = filter.fir_filter_ccf(1, firdes.low_pass( 1, audio_samp_rate, deviation+max_modulation_freq, 3000, firdes.WIN_HAMMING, 6.76)) self.hilbert_fc_0 = filter.hilbert_fc(65, firdes.WIN_HAMMING, 6.76) self.freq_xlating_fir_filter_xxx_0_0 = filter.freq_xlating_fir_filter_ccc(4, (63, ), 1750, audio_samp_rate) self.freq_xlating_fir_filter_xxx_0 = filter.freq_xlating_fir_filter_ccc(int(samp_rate_rx/filter_rate), (xlate_filter_taps), lo_offset, samp_rate_rx) self.blks2_rational_resampler_xxx_1 = filter.rational_resampler_ccc( interpolation=24, decimation=125, taps=None, fractional_bw=None, ) self.analog_quadrature_demod_cf_0 = analog.quadrature_demod_cf((2*math.pi*deviation)/audio_samp_rate) self.analog_nbfm_rx_0 = analog.nbfm_rx( audio_rate=12000, quad_rate=12000, tau=75e-6, max_dev=600, ) ################################################## # Connections ################################################## self.msg_connect((self.satnogs_tcp_rigctl_msg_source_0, 'freq'), (self.satnogs_coarse_doppler_correction_cc_0, 'freq')) self.connect((self.analog_nbfm_rx_0, 0), (self.low_pass_filter_0_0, 0)) self.connect((self.analog_quadrature_demod_cf_0, 0), (self.hilbert_fc_0, 0)) self.connect((self.analog_quadrature_demod_cf_0, 0), (self.satnogs_ogg_encoder_0, 0)) self.connect((self.blks2_rational_resampler_xxx_1, 0), (self.low_pass_filter_0, 0)) self.connect((self.blks2_rational_resampler_xxx_1, 0), (self.satnogs_iq_sink_0, 0)) self.connect((self.blks2_rational_resampler_xxx_1, 0), (self.satnogs_waterfall_sink_0, 0)) self.connect((self.freq_xlating_fir_filter_xxx_0, 0), (self.blks2_rational_resampler_xxx_1, 0)) self.connect((self.freq_xlating_fir_filter_xxx_0_0, 0), (self.analog_nbfm_rx_0, 0)) self.connect((self.hilbert_fc_0, 0), (self.freq_xlating_fir_filter_xxx_0_0, 0)) self.connect((self.low_pass_filter_0, 0), (self.analog_quadrature_demod_cf_0, 0)) self.connect((self.low_pass_filter_0_0, 0), (self.rational_resampler_xxx_0, 0)) self.connect((self.osmosdr_source_0, 0), (self.satnogs_coarse_doppler_correction_cc_0, 0)) self.connect((self.rational_resampler_xxx_0, 0), (self.satnogs_sstv_pd120_sink_0, 0)) self.connect((self.satnogs_coarse_doppler_correction_cc_0, 0), (self.freq_xlating_fir_filter_xxx_0, 0)) def get_antenna(self): return self.antenna def set_antenna(self, antenna): self.antenna = antenna self.osmosdr_source_0.set_antenna(satnogs.handle_rx_antenna(self.rx_sdr_device, self.antenna), 0) def get_bb_gain(self): return self.bb_gain def set_bb_gain(self, bb_gain): self.bb_gain = bb_gain self.osmosdr_source_0.set_bb_gain(satnogs.handle_rx_bb_gain(self.rx_sdr_device, self.bb_gain), 0) def get_decoded_data_file_path(self): return self.decoded_data_file_path def set_decoded_data_file_path(self, decoded_data_file_path): self.decoded_data_file_path = decoded_data_file_path def get_dev_args(self): return self.dev_args def set_dev_args(self, dev_args): self.dev_args = dev_args def get_doppler_correction_per_sec(self): return self.doppler_correction_per_sec def set_doppler_correction_per_sec(self, doppler_correction_per_sec): self.doppler_correction_per_sec = doppler_correction_per_sec def get_enable_iq_dump(self): return self.enable_iq_dump def set_enable_iq_dump(self, enable_iq_dump): self.enable_iq_dump = enable_iq_dump def get_file_path(self): return self.file_path def set_file_path(self, file_path): self.file_path = file_path def get_if_gain(self): return self.if_gain def set_if_gain(self, if_gain): self.if_gain = if_gain self.osmosdr_source_0.set_if_gain(satnogs.handle_rx_if_gain(self.rx_sdr_device, self.if_gain), 0) def get_iq_file_path(self): return self.iq_file_path def set_iq_file_path(self, iq_file_path): self.iq_file_path = iq_file_path def get_lo_offset(self): return self.lo_offset def set_lo_offset(self, lo_offset): self.lo_offset = lo_offset self.osmosdr_source_0.set_center_freq(self.rx_freq - self.lo_offset, 0) self.freq_xlating_fir_filter_xxx_0.set_center_freq(self.lo_offset) def get_ppm(self): return self.ppm def set_ppm(self, ppm): self.ppm = ppm self.osmosdr_source_0.set_freq_corr(self.ppm, 0) def get_rf_gain(self): return self.rf_gain def set_rf_gain(self, rf_gain): self.rf_gain = rf_gain self.osmosdr_source_0.set_gain(satnogs.handle_rx_rf_gain(self.rx_sdr_device, self.rf_gain), 0) def get_rigctl_port(self): return self.rigctl_port def set_rigctl_port(self, rigctl_port): self.rigctl_port = rigctl_port def get_rx_freq(self): return self.rx_freq def set_rx_freq(self, rx_freq): self.rx_freq = rx_freq self.satnogs_coarse_doppler_correction_cc_0.set_new_freq_locked(self.rx_freq) self.osmosdr_source_0.set_center_freq(self.rx_freq - self.lo_offset, 0) def get_rx_sdr_device(self): return self.rx_sdr_device def set_rx_sdr_device(self, rx_sdr_device): self.rx_sdr_device = rx_sdr_device self.set_samp_rate_rx(satnogs.hw_rx_settings[self.rx_sdr_device]['samp_rate']) self.osmosdr_source_0.set_gain(satnogs.handle_rx_rf_gain(self.rx_sdr_device, self.rf_gain), 0) self.osmosdr_source_0.set_if_gain(satnogs.handle_rx_if_gain(self.rx_sdr_device, self.if_gain), 0) self.osmosdr_source_0.set_bb_gain(satnogs.handle_rx_bb_gain(self.rx_sdr_device, self.bb_gain), 0) self.osmosdr_source_0.set_antenna(satnogs.handle_rx_antenna(self.rx_sdr_device, self.antenna), 0) def get_waterfall_file_path(self): return self.waterfall_file_path def set_waterfall_file_path(self, waterfall_file_path): self.waterfall_file_path = waterfall_file_path def get_samp_rate_rx(self): return self.samp_rate_rx def set_samp_rate_rx(self, samp_rate_rx): self.samp_rate_rx = samp_rate_rx self.set_xlate_filter_taps(firdes.low_pass(1, self.samp_rate_rx, 125000, 25000, firdes.WIN_HAMMING, 6.76)) self.osmosdr_source_0.set_sample_rate(self.samp_rate_rx) self.osmosdr_source_0.set_bandwidth(self.samp_rate_rx, 0) def get_xlate_filter_taps(self): return self.xlate_filter_taps def set_xlate_filter_taps(self, xlate_filter_taps): self.xlate_filter_taps = xlate_filter_taps self.freq_xlating_fir_filter_xxx_0.set_taps((self.xlate_filter_taps)) def get_taps(self): return self.taps def set_taps(self, taps): self.taps = taps def get_max_modulation_freq(self): return self.max_modulation_freq def set_max_modulation_freq(self, max_modulation_freq): self.max_modulation_freq = max_modulation_freq self.low_pass_filter_0.set_taps(firdes.low_pass(1, self.audio_samp_rate, self.deviation+self.max_modulation_freq, 3000, firdes.WIN_HAMMING, 6.76)) def get_filter_rate(self): return self.filter_rate def set_filter_rate(self, filter_rate): self.filter_rate = filter_rate def get_deviation(self): return self.deviation def set_deviation(self, deviation): self.deviation = deviation self.low_pass_filter_0.set_taps(firdes.low_pass(1, self.audio_samp_rate, self.deviation+self.max_modulation_freq, 3000, firdes.WIN_HAMMING, 6.76)) self.analog_quadrature_demod_cf_0.set_gain((2*math.pi*self.deviation)/self.audio_samp_rate) def get_audio_samp_rate(self): return self.audio_samp_rate def set_audio_samp_rate(self, audio_samp_rate): self.audio_samp_rate = audio_samp_rate self.low_pass_filter_0.set_taps(firdes.low_pass(1, self.audio_samp_rate, self.deviation+self.max_modulation_freq, 3000, firdes.WIN_HAMMING, 6.76)) self.analog_quadrature_demod_cf_0.set_gain((2*math.pi*self.deviation)/self.audio_samp_rate) def argument_parser(): description = 'A PD120 SSTV demodulator' parser = OptionParser(usage="%prog: [options]", option_class=eng_option, description=description) parser.add_option( "", "--antenna", dest="antenna", type="string", default=satnogs.not_set_antenna, help="Set antenna [default=%default]") parser.add_option( "", "--bb-gain", dest="bb_gain", type="eng_float", default=eng_notation.num_to_str(satnogs.not_set_rx_bb_gain), help="Set bb_gain [default=%default]") parser.add_option( "", "--decoded-data-file-path", dest="decoded_data_file_path", type="string", default='/tmp/.satnogs/data/data', help="Set decoded_data_file_path [default=%default]") parser.add_option( "", "--dev-args", dest="dev_args", type="string", default=satnogs.not_set_dev_args, help="Set dev_args [default=%default]") parser.add_option( "", "--doppler-correction-per-sec", dest="doppler_correction_per_sec", type="intx", default=20, help="Set doppler_correction_per_sec [default=%default]") parser.add_option( "", "--enable-iq-dump", dest="enable_iq_dump", type="intx", default=0, help="Set enable_iq_dump [default=%default]") parser.add_option( "", "--file-path", dest="file_path", type="string", default='test.ogg', help="Set file_path [default=%default]") parser.add_option( "", "--if-gain", dest="if_gain", type="eng_float", default=eng_notation.num_to_str(satnogs.not_set_rx_if_gain), help="Set if_gain [default=%default]") parser.add_option( "", "--iq-file-path", dest="iq_file_path", type="string", default='/tmp/iq.dat', help="Set iq_file_path [default=%default]") parser.add_option( "", "--lo-offset", dest="lo_offset", type="eng_float", default=eng_notation.num_to_str(100e3), help="Set lo_offset [default=%default]") parser.add_option( "", "--ppm", dest="ppm", type="intx", default=0, help="Set ppm [default=%default]") parser.add_option( "", "--rf-gain", dest="rf_gain", type="eng_float", default=eng_notation.num_to_str(satnogs.not_set_rx_rf_gain), help="Set rf_gain [default=%default]") parser.add_option( "", "--rigctl-port", dest="rigctl_port", type="intx", default=4532, help="Set rigctl_port [default=%default]") parser.add_option( "", "--rx-freq", dest="rx_freq", type="eng_float", default=eng_notation.num_to_str(100e6), help="Set rx_freq [default=%default]") parser.add_option( "", "--rx-sdr-device", dest="rx_sdr_device", type="string", default='usrpb200', help="Set rx_sdr_device [default=%default]") parser.add_option( "", "--waterfall-file-path", dest="waterfall_file_path", type="string", default='/tmp/waterfall.dat', help="Set waterfall_file_path [default=%default]") return parser def main(top_block_cls=satnogs_sstv_pd120_demod, options=None): if options is None: options, _ = argument_parser().parse_args() tb = top_block_cls(antenna=options.antenna, bb_gain=options.bb_gain, decoded_data_file_path=options.decoded_data_file_path, dev_args=options.dev_args, doppler_correction_per_sec=options.doppler_correction_per_sec, enable_iq_dump=options.enable_iq_dump, file_path=options.file_path, if_gain=options.if_gain, iq_file_path=options.iq_file_path, lo_offset=options.lo_offset, ppm=options.ppm, rf_gain=options.rf_gain, rigctl_port=options.rigctl_port, rx_freq=options.rx_freq, rx_sdr_device=options.rx_sdr_device, waterfall_file_path=options.waterfall_file_path) tb.start() tb.wait() if __name__ == '__main__': main()