#!/usr/bin/env python ################################################## # Gnuradio Python Flow Graph # Title: USRP HRPT Receiver # Generated: Thu Oct 27 13:48:25 2011 ################################################## from gnuradio import digital from gnuradio import eng_notation from gnuradio import gr from gnuradio import noaa from gnuradio.eng_option import eng_option from gnuradio.gr import firdes from optparse import OptionParser import ConfigParser import math, os class file_rx_hrpt(gr.top_block): def __init__(self): gr.top_block.__init__(self, "USRP HRPT Receiver") ################################################## # Variables ################################################## self.sym_rate = sym_rate = 600*1109 self.sample_rate = sample_rate = 4e6 self.sps = sps = sample_rate/sym_rate self.config_filename = config_filename = os.environ['HOME']+'/.gnuradio/config.conf' self._pll_alpha_config = ConfigParser.ConfigParser() self._pll_alpha_config.read(config_filename) try: pll_alpha = self._pll_alpha_config.getfloat('usrp_rx_hrpt', 'pll_alpha') except: pll_alpha = 0.01 self.pll_alpha = pll_alpha self._output_filename_config = ConfigParser.ConfigParser() self._output_filename_config.read(config_filename) try: output_filename = self._output_filename_config.get('usrp_rx_hrpt', 'filename') except: output_filename = 'frames.hrpt' self.output_filename = output_filename self.max_clock_offset = max_clock_offset = 100e-6 self.max_carrier_offset = max_carrier_offset = 2*math.pi*100e3/sample_rate self.hs = hs = int(sps/2.0) self._gain_config = ConfigParser.ConfigParser() self._gain_config.read(config_filename) try: gain = self._gain_config.getfloat('usrp_rx_hrpt', 'gain') except: gain = 35 self.gain = gain self._freq_config = ConfigParser.ConfigParser() self._freq_config.read(config_filename) try: freq = self._freq_config.getfloat('usrp_rx_hrpt', 'freq') except: freq = 1698e6 self.freq = freq self._clock_alpha_config = ConfigParser.ConfigParser() self._clock_alpha_config.read(config_filename) try: clock_alpha = self._clock_alpha_config.getfloat('usrp_rx_hrpt', 'clock_alpha') except: clock_alpha = 0.01 self.clock_alpha = clock_alpha ################################################## # Blocks ################################################## self.throttle = gr.throttle(gr.sizeof_short*1, 2*sample_rate) self.pll = noaa.hrpt_pll_cf(pll_alpha, pll_alpha**2/4.0, max_carrier_offset) self.gr_moving_average_xx_0 = gr.moving_average_ff(hs, 1.0/hs, 4000) self.gr_interleaved_short_to_complex_0 = gr.interleaved_short_to_complex() self.gr_file_source_0 = gr.file_source(gr.sizeof_short*1, "input_filename", False) self.frame_sink = gr.file_sink(gr.sizeof_short*1, output_filename) self.frame_sink.set_unbuffered(False) self.digital_clock_recovery_mm_xx_0 = digital.clock_recovery_mm_ff(sps/2.0, clock_alpha**2/4.0, 0.5, clock_alpha, max_clock_offset) self.digital_binary_slicer_fb_0 = digital.binary_slicer_fb() self.deframer = noaa.hrpt_deframer() self.decoder = noaa.hrpt_decoder(True,True) self.agc = gr.agc_cc(1e-6, 1.0, 1.0, 1.0) ################################################## # Connections ################################################## self.connect((self.gr_moving_average_xx_0, 0), (self.digital_clock_recovery_mm_xx_0, 0)) self.connect((self.pll, 0), (self.gr_moving_average_xx_0, 0)) self.connect((self.agc, 0), (self.pll, 0)) self.connect((self.deframer, 0), (self.decoder, 0)) self.connect((self.deframer, 0), (self.frame_sink, 0)) self.connect((self.gr_interleaved_short_to_complex_0, 0), (self.agc, 0)) self.connect((self.throttle, 0), (self.gr_interleaved_short_to_complex_0, 0)) self.connect((self.gr_file_source_0, 0), (self.throttle, 0)) self.connect((self.digital_clock_recovery_mm_xx_0, 0), (self.digital_binary_slicer_fb_0, 0)) self.connect((self.digital_binary_slicer_fb_0, 0), (self.deframer, 0)) def get_sym_rate(self): return self.sym_rate def set_sym_rate(self, sym_rate): self.sym_rate = sym_rate self.set_sps(self.sample_rate/self.sym_rate) def get_sample_rate(self): return self.sample_rate def set_sample_rate(self, sample_rate): self.sample_rate = sample_rate self.set_max_carrier_offset(2*math.pi*100e3/self.sample_rate) self.set_sps(self.sample_rate/self.sym_rate) def get_sps(self): return self.sps def set_sps(self, sps): self.sps = sps self.set_hs(int(self.sps/2.0)) self.digital_clock_recovery_mm_xx_0.set_omega(self.sps/2.0) def get_config_filename(self): return self.config_filename def set_config_filename(self, config_filename): self.config_filename = config_filename self._freq_config = ConfigParser.ConfigParser() self._freq_config.read(self.config_filename) if not self._freq_config.has_section('usrp_rx_hrpt'): self._freq_config.add_section('usrp_rx_hrpt') self._freq_config.set('usrp_rx_hrpt', 'freq', str(self.freq)) self._freq_config.write(open(self.config_filename, 'w')) self._gain_config = ConfigParser.ConfigParser() self._gain_config.read(self.config_filename) if not self._gain_config.has_section('usrp_rx_hrpt'): self._gain_config.add_section('usrp_rx_hrpt') self._gain_config.set('usrp_rx_hrpt', 'gain', str(self.gain)) self._gain_config.write(open(self.config_filename, 'w')) self._pll_alpha_config = ConfigParser.ConfigParser() self._pll_alpha_config.read(self.config_filename) if not self._pll_alpha_config.has_section('usrp_rx_hrpt'): self._pll_alpha_config.add_section('usrp_rx_hrpt') self._pll_alpha_config.set('usrp_rx_hrpt', 'pll_alpha', str(self.pll_alpha)) self._pll_alpha_config.write(open(self.config_filename, 'w')) self._clock_alpha_config = ConfigParser.ConfigParser() self._clock_alpha_config.read(self.config_filename) if not self._clock_alpha_config.has_section('usrp_rx_hrpt'): self._clock_alpha_config.add_section('usrp_rx_hrpt') self._clock_alpha_config.set('usrp_rx_hrpt', 'clock_alpha', str(self.clock_alpha)) self._clock_alpha_config.write(open(self.config_filename, 'w')) self._output_filename_config = ConfigParser.ConfigParser() self._output_filename_config.read(self.config_filename) if not self._output_filename_config.has_section('usrp_rx_hrpt'): self._output_filename_config.add_section('usrp_rx_hrpt') self._output_filename_config.set('usrp_rx_hrpt', 'filename', str(self.output_filename)) self._output_filename_config.write(open(self.config_filename, 'w')) def get_pll_alpha(self): return self.pll_alpha def set_pll_alpha(self, pll_alpha): self.pll_alpha = pll_alpha self.pll.set_alpha(self.pll_alpha) self.pll.set_beta(self.pll_alpha**2/4.0) self._pll_alpha_config = ConfigParser.ConfigParser() self._pll_alpha_config.read(self.config_filename) if not self._pll_alpha_config.has_section('usrp_rx_hrpt'): self._pll_alpha_config.add_section('usrp_rx_hrpt') self._pll_alpha_config.set('usrp_rx_hrpt', 'pll_alpha', str(self.pll_alpha)) self._pll_alpha_config.write(open(self.config_filename, 'w')) def get_output_filename(self): return self.output_filename def set_output_filename(self, output_filename): self.output_filename = output_filename self._output_filename_config = ConfigParser.ConfigParser() self._output_filename_config.read(self.config_filename) if not self._output_filename_config.has_section('usrp_rx_hrpt'): self._output_filename_config.add_section('usrp_rx_hrpt') self._output_filename_config.set('usrp_rx_hrpt', 'filename', str(self.output_filename)) self._output_filename_config.write(open(self.config_filename, 'w')) def get_max_clock_offset(self): return self.max_clock_offset def set_max_clock_offset(self, max_clock_offset): self.max_clock_offset = max_clock_offset def get_max_carrier_offset(self): return self.max_carrier_offset def set_max_carrier_offset(self, max_carrier_offset): self.max_carrier_offset = max_carrier_offset self.pll.set_max_offset(self.max_carrier_offset) def get_hs(self): return self.hs def set_hs(self, hs): self.hs = hs self.gr_moving_average_xx_0.set_length_and_scale(self.hs, 1.0/self.hs) def get_gain(self): return self.gain def set_gain(self, gain): self.gain = gain self._gain_config = ConfigParser.ConfigParser() self._gain_config.read(self.config_filename) if not self._gain_config.has_section('usrp_rx_hrpt'): self._gain_config.add_section('usrp_rx_hrpt') self._gain_config.set('usrp_rx_hrpt', 'gain', str(self.gain)) self._gain_config.write(open(self.config_filename, 'w')) def get_freq(self): return self.freq def set_freq(self, freq): self.freq = freq self._freq_config = ConfigParser.ConfigParser() self._freq_config.read(self.config_filename) if not self._freq_config.has_section('usrp_rx_hrpt'): self._freq_config.add_section('usrp_rx_hrpt') self._freq_config.set('usrp_rx_hrpt', 'freq', str(self.freq)) self._freq_config.write(open(self.config_filename, 'w')) def get_clock_alpha(self): return self.clock_alpha def set_clock_alpha(self, clock_alpha): self.clock_alpha = clock_alpha self.digital_clock_recovery_mm_xx_0.set_gain_omega(self.clock_alpha**2/4.0) self.digital_clock_recovery_mm_xx_0.set_gain_mu(self.clock_alpha) self._clock_alpha_config = ConfigParser.ConfigParser() self._clock_alpha_config.read(self.config_filename) if not self._clock_alpha_config.has_section('usrp_rx_hrpt'): self._clock_alpha_config.add_section('usrp_rx_hrpt') self._clock_alpha_config.set('usrp_rx_hrpt', 'clock_alpha', str(self.clock_alpha)) self._clock_alpha_config.write(open(self.config_filename, 'w')) if __name__ == '__main__': parser = OptionParser(option_class=eng_option, usage="%prog: [options]") (options, args) = parser.parse_args() tb = file_rx_hrpt() tb.start() raw_input('Press Enter to quit: ') tb.stop()