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rtlsdr_usb_wide.py
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#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# SPDX-License-Identifier: GPL-3.0
#
# GNU Radio Python Flow Graph
# Title: Wide SSB receiver for an RTL-SDR device
# Author: Daniel Estevez
# Description: Receives with an RTL-SDR and streams the wide USB audio (24kHz filter)
# GNU Radio version: 3.8.1.0
from gnuradio import analog
from gnuradio import blocks
from gnuradio import filter
from gnuradio.filter import firdes
from gnuradio import gr
import sys
import signal
from argparse import ArgumentParser
from gnuradio.eng_arg import eng_float, intx
from gnuradio import eng_notation
import gpredict
import osmosdr
import time
class rtlsdr_usb_wide(gr.top_block):
def __init__(self, bb_gain=20, destination='localhost', freq=0, freq_corr=0, gpredict_port=4532, if_gain=20, offset=50e3, port=7355, rf_gain=40):
gr.top_block.__init__(self, "Wide SSB receiver for an RTL-SDR device")
##################################################
# Parameters
##################################################
self.bb_gain = bb_gain
self.destination = destination
self.freq = freq
self.freq_corr = freq_corr
self.gpredict_port = gpredict_port
self.if_gain = if_gain
self.offset = offset
self.port = port
self.rf_gain = rf_gain
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 2.4e6
self.doppler_freq = doppler_freq = freq
##################################################
# Blocks
##################################################
self.osmosdr_source_0 = osmosdr.source(
args="numchan=" + str(1) + " " + 'rtl'
)
self.osmosdr_source_0.set_time_unknown_pps(osmosdr.time_spec_t())
self.osmosdr_source_0.set_sample_rate(samp_rate)
self.osmosdr_source_0.set_center_freq(freq-offset, 0)
self.osmosdr_source_0.set_freq_corr(freq_corr, 0)
self.osmosdr_source_0.set_gain(rf_gain, 0)
self.osmosdr_source_0.set_if_gain(if_gain, 0)
self.osmosdr_source_0.set_bb_gain(bb_gain, 0)
self.osmosdr_source_0.set_antenna('', 0)
self.osmosdr_source_0.set_bandwidth(0, 0)
self.gpredict_doppler_0 = gpredict.doppler('localhost', gpredict_port, False)
self.freq_xlating_fir_filter_xxx_0 = filter.freq_xlating_fir_filter_ccc(50, firdes.low_pass(1, samp_rate, 12000, 500), doppler_freq-freq+offset, samp_rate)
self.blocks_udp_sink_0 = blocks.udp_sink(gr.sizeof_short*1, destination, port, 1472, True)
self.blocks_multiply_xx_0 = blocks.multiply_vcc(1)
self.blocks_float_to_short_0 = blocks.float_to_short(1, 32767)
self.blocks_complex_to_real_0 = blocks.complex_to_real(1)
self.analog_sig_source_x_0 = analog.sig_source_c(48000, analog.GR_COS_WAVE, 12000, 1, 0, 0)
##################################################
# Connections
##################################################
self.connect((self.analog_sig_source_x_0, 0), (self.blocks_multiply_xx_0, 0))
self.connect((self.blocks_complex_to_real_0, 0), (self.blocks_float_to_short_0, 0))
self.connect((self.blocks_float_to_short_0, 0), (self.blocks_udp_sink_0, 0))
self.connect((self.blocks_multiply_xx_0, 0), (self.blocks_complex_to_real_0, 0))
self.connect((self.freq_xlating_fir_filter_xxx_0, 0), (self.blocks_multiply_xx_0, 1))
self.connect((self.osmosdr_source_0, 0), (self.freq_xlating_fir_filter_xxx_0, 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(self.bb_gain, 0)
def get_destination(self):
return self.destination
def set_destination(self, destination):
self.destination = destination
def get_freq(self):
return self.freq
def set_freq(self, freq):
self.freq = freq
self.set_doppler_freq(self.freq)
self.freq_xlating_fir_filter_xxx_0.set_center_freq(self.doppler_freq-self.freq+self.offset)
self.osmosdr_source_0.set_center_freq(self.freq-self.offset, 0)
def get_freq_corr(self):
return self.freq_corr
def set_freq_corr(self, freq_corr):
self.freq_corr = freq_corr
self.osmosdr_source_0.set_freq_corr(self.freq_corr, 0)
def get_gpredict_port(self):
return self.gpredict_port
def set_gpredict_port(self, gpredict_port):
self.gpredict_port = gpredict_port
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(self.if_gain, 0)
def get_offset(self):
return self.offset
def set_offset(self, offset):
self.offset = offset
self.freq_xlating_fir_filter_xxx_0.set_center_freq(self.doppler_freq-self.freq+self.offset)
self.osmosdr_source_0.set_center_freq(self.freq-self.offset, 0)
def get_port(self):
return self.port
def set_port(self, port):
self.port = port
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(self.rf_gain, 0)
def get_samp_rate(self):
return self.samp_rate
def set_samp_rate(self, samp_rate):
self.samp_rate = samp_rate
self.freq_xlating_fir_filter_xxx_0.set_taps(firdes.low_pass(1, self.samp_rate, 12000, 500))
self.osmosdr_source_0.set_sample_rate(self.samp_rate)
def get_doppler_freq(self):
return self.doppler_freq
def set_doppler_freq(self, doppler_freq):
self.doppler_freq = doppler_freq
self.freq_xlating_fir_filter_xxx_0.set_center_freq(self.doppler_freq-self.freq+self.offset)
def argument_parser():
description = 'Receives with an RTL-SDR and streams the wide USB audio (24kHz filter)'
parser = ArgumentParser(description=description)
parser.add_argument(
"--bb-gain", dest="bb_gain", type=eng_float, default="20.0",
help="Set baseband gain [default=%(default)r]")
parser.add_argument(
"--destination", dest="destination", type=str, default='localhost',
help="Set localhost [default=%(default)r]")
parser.add_argument(
"-f", "--freq", dest="freq", type=eng_float, default="0.0",
help="Set frequency [default=%(default)r]")
parser.add_argument(
"--freq-corr", dest="freq_corr", type=eng_float, default="0.0",
help="Set frequency correction (ppm) [default=%(default)r]")
parser.add_argument(
"--gpredict-port", dest="gpredict_port", type=intx, default=4532,
help="Set GPredict port [default=%(default)r]")
parser.add_argument(
"--if-gain", dest="if_gain", type=eng_float, default="20.0",
help="Set IF gain [default=%(default)r]")
parser.add_argument(
"--offset", dest="offset", type=eng_float, default="50.0k",
help="Set centre frequency offset [default=%(default)r]")
parser.add_argument(
"--port", dest="port", type=intx, default=7355,
help="Set port [default=%(default)r]")
parser.add_argument(
"--rf-gain", dest="rf_gain", type=eng_float, default="40.0",
help="Set RF gain [default=%(default)r]")
return parser
def main(top_block_cls=rtlsdr_usb_wide, options=None):
if options is None:
options = argument_parser().parse_args()
tb = top_block_cls(bb_gain=options.bb_gain, destination=options.destination, freq=options.freq, freq_corr=options.freq_corr, gpredict_port=options.gpredict_port, if_gain=options.if_gain, offset=options.offset, port=options.port, rf_gain=options.rf_gain)
def sig_handler(sig=None, frame=None):
tb.stop()
tb.wait()
sys.exit(0)
signal.signal(signal.SIGINT, sig_handler)
signal.signal(signal.SIGTERM, sig_handler)
tb.start()
tb.wait()
if __name__ == '__main__':
main()