Hi Friends, I am trying to receive the ADS-B signals to identify the aircraft location , amplitude, speed, etc in GNU Radio using RTL-SDR V4. But in my output I can't receive the ADS-B signal. I have no idea how to check my Flowgraph. Screenshot and .grc file of my flowgraph is attached below. Also I want to connect this with an external software called VIRTUAL RADAR to locate the fligh. Please help me friends. Feel free to ask if any other information is required. Thank you Nitheesh Babu
adsb_rx.grc
Description: Binary data
#!/usr/bin/env python3 # -*- coding: utf-8 -*-
#
# SPDX-License-Identifier: GPL-3.0
#
# GNU Radio Python Flow Graph
# Title: ADS-B Receiver
# Author: Matt Hostetter
# GNU Radio version: 3.10.9.2
from PyQt5 import Qt
from gnuradio import qtgui
from PyQt5 import QtCore
from gnuradio import analog
from gnuradio import blocks
from gnuradio import gr
from gnuradio.filter import firdes
from gnuradio.fft import window
import sys
import signal
from PyQt5 import Qt
from argparse import ArgumentParser
from gnuradio.eng_arg import eng_float, intx
from gnuradio import eng_notation
import gnuradio.adsb as adsb
import osmosdr
import time
import sip
class adsb_rx(gr.top_block, Qt.QWidget):
def __init__(self):
gr.top_block.__init__(self, "ADS-B Receiver", catch_exceptions=True)
Qt.QWidget.__init__(self)
self.setWindowTitle("ADS-B Receiver")
qtgui.util.check_set_qss()
try:
self.setWindowIcon(Qt.QIcon.fromTheme('gnuradio-grc'))
except BaseException as exc:
print(f"Qt GUI: Could not set Icon: {str(exc)}", file=sys.stderr)
self.top_scroll_layout = Qt.QVBoxLayout()
self.setLayout(self.top_scroll_layout)
self.top_scroll = Qt.QScrollArea()
self.top_scroll.setFrameStyle(Qt.QFrame.NoFrame)
self.top_scroll_layout.addWidget(self.top_scroll)
self.top_scroll.setWidgetResizable(True)
self.top_widget = Qt.QWidget()
self.top_scroll.setWidget(self.top_widget)
self.top_layout = Qt.QVBoxLayout(self.top_widget)
self.top_grid_layout = Qt.QGridLayout()
self.top_layout.addLayout(self.top_grid_layout)
self.settings = Qt.QSettings("GNU Radio", "adsb_rx")
try:
geometry = self.settings.value("geometry")
if geometry:
self.restoreGeometry(geometry)
except BaseException as exc:
print(f"Qt GUI: Could not restore geometry: {str(exc)}", file=sys.stderr)
##################################################
# Variables
##################################################
self.threshold = threshold = 4
self.sample_rate = sample_rate = 2e6
self.gain = gain = 22.9
self.freq = freq = 1091*1e6
##################################################
# Blocks
##################################################
self._threshold_range = qtgui.Range(1, 7, 0.5, 4, 200)
self._threshold_win = qtgui.RangeWidget(self._threshold_range, self.set_threshold, "'threshold'", "counter_slider", float, QtCore.Qt.Horizontal)
self.top_layout.addWidget(self._threshold_win)
self._gain_range = qtgui.Range(20, 60, 2, 22.9, 200)
self._gain_win = qtgui.RangeWidget(self._gain_range, self.set_gain, "'gain'", "counter_slider", float, QtCore.Qt.Horizontal)
self.top_layout.addWidget(self._gain_win)
self.rtlsdr_source_0 = osmosdr.source(
args="numchan=" + str(1) + " " + ""
)
self.rtlsdr_source_0.set_sample_rate(sample_rate)
self.rtlsdr_source_0.set_center_freq(freq, 0)
self.rtlsdr_source_0.set_freq_corr(0, 0)
self.rtlsdr_source_0.set_dc_offset_mode(2, 0)
self.rtlsdr_source_0.set_iq_balance_mode(2, 0)
self.rtlsdr_source_0.set_gain_mode(False, 0)
self.rtlsdr_source_0.set_gain(gain, 0)
self.rtlsdr_source_0.set_if_gain(20, 0)
self.rtlsdr_source_0.set_bb_gain(20, 0)
self.rtlsdr_source_0.set_antenna('', 0)
self.rtlsdr_source_0.set_bandwidth(0, 0)
self.qtgui_time_sink_x_0_0_0 = qtgui.time_sink_f(
300, #size
int(sample_rate), #samp_rate
"Demodulated", #name
2, #number of inputs
None # parent
)
self.qtgui_time_sink_x_0_0_0.set_update_time(5)
self.qtgui_time_sink_x_0_0_0.set_y_axis(0, 1)
self.qtgui_time_sink_x_0_0_0.set_y_label('Amplitude', "")
self.qtgui_time_sink_x_0_0_0.enable_tags(True)
self.qtgui_time_sink_x_0_0_0.set_trigger_mode(qtgui.TRIG_MODE_TAG, qtgui.TRIG_SLOPE_POS, 0, 1.25e-6, 0, "burst")
self.qtgui_time_sink_x_0_0_0.enable_autoscale(True)
self.qtgui_time_sink_x_0_0_0.enable_grid(True)
self.qtgui_time_sink_x_0_0_0.enable_axis_labels(True)
self.qtgui_time_sink_x_0_0_0.enable_control_panel(False)
self.qtgui_time_sink_x_0_0_0.enable_stem_plot(False)
self.qtgui_time_sink_x_0_0_0.disable_legend()
labels = ['', '', '', '', '',
'', '', '', '', '']
widths = [1, 1, 1, 1, 1,
1, 1, 1, 1, 1]
colors = ['blue', 'red', 'green', 'black', 'cyan',
'magenta', 'yellow', 'dark red', 'dark green', 'dark blue']
alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0]
styles = [1, 1, 1, 1, 1,
1, 1, 1, 1, 1]
markers = [0, -1, -1, -1, -1,
-1, -1, -1, -1, -1]
for i in range(2):
if len(labels[i]) == 0:
self.qtgui_time_sink_x_0_0_0.set_line_label(i, "Data {0}".format(i))
else:
self.qtgui_time_sink_x_0_0_0.set_line_label(i, labels[i])
self.qtgui_time_sink_x_0_0_0.set_line_width(i, widths[i])
self.qtgui_time_sink_x_0_0_0.set_line_color(i, colors[i])
self.qtgui_time_sink_x_0_0_0.set_line_style(i, styles[i])
self.qtgui_time_sink_x_0_0_0.set_line_marker(i, markers[i])
self.qtgui_time_sink_x_0_0_0.set_line_alpha(i, alphas[i])
self._qtgui_time_sink_x_0_0_0_win = sip.wrapinstance(self.qtgui_time_sink_x_0_0_0.qwidget(), Qt.QWidget)
self.top_layout.addWidget(self._qtgui_time_sink_x_0_0_0_win)
self.qtgui_time_sink_x_0_0 = qtgui.time_sink_c(
1024, #size
int(sample_rate), #samp_rate
"signal source", #name
1, #number of inputs
None # parent
)
self.qtgui_time_sink_x_0_0.set_update_time(1.0/100.0)
self.qtgui_time_sink_x_0_0.set_y_axis(0, 1)
self.qtgui_time_sink_x_0_0.set_y_label('Amplitude', "")
self.qtgui_time_sink_x_0_0.enable_tags(True)
self.qtgui_time_sink_x_0_0.set_trigger_mode(qtgui.TRIG_MODE_TAG, qtgui.TRIG_SLOPE_POS, 0, 1.25e-6, 0, "burst")
self.qtgui_time_sink_x_0_0.enable_autoscale(True)
self.qtgui_time_sink_x_0_0.enable_grid(True)
self.qtgui_time_sink_x_0_0.enable_axis_labels(True)
self.qtgui_time_sink_x_0_0.enable_control_panel(False)
self.qtgui_time_sink_x_0_0.enable_stem_plot(False)
self.qtgui_time_sink_x_0_0.disable_legend()
labels = ['', '', '', '', '',
'', '', '', '', '']
widths = [1, 1, 1, 1, 1,
1, 1, 1, 1, 1]
colors = ['blue', 'red', 'green', 'black', 'cyan',
'magenta', 'yellow', 'dark red', 'dark green', 'dark blue']
alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0]
styles = [1, 1, 1, 1, 1,
1, 1, 1, 1, 1]
markers = [0, -1, -1, -1, -1,
-1, -1, -1, -1, -1]
for i in range(2):
if len(labels[i]) == 0:
if (i % 2 == 0):
self.qtgui_time_sink_x_0_0.set_line_label(i, "Re{{Data {0}}}".format(i/2))
else:
self.qtgui_time_sink_x_0_0.set_line_label(i, "Im{{Data {0}}}".format(i/2))
else:
self.qtgui_time_sink_x_0_0.set_line_label(i, labels[i])
self.qtgui_time_sink_x_0_0.set_line_width(i, widths[i])
self.qtgui_time_sink_x_0_0.set_line_color(i, colors[i])
self.qtgui_time_sink_x_0_0.set_line_style(i, styles[i])
self.qtgui_time_sink_x_0_0.set_line_marker(i, markers[i])
self.qtgui_time_sink_x_0_0.set_line_alpha(i, alphas[i])
self._qtgui_time_sink_x_0_0_win = sip.wrapinstance(self.qtgui_time_sink_x_0_0.qwidget(), Qt.QWidget)
self.top_grid_layout.addWidget(self._qtgui_time_sink_x_0_0_win, 1, 0, 1, 2)
for r in range(1, 2):
self.top_grid_layout.setRowStretch(r, 1)
for c in range(0, 2):
self.top_grid_layout.setColumnStretch(c, 1)
self.qtgui_freq_sink_x_0_0 = qtgui.freq_sink_f(
1024, #size
window.WIN_BLACKMAN_hARRIS, #wintype
freq, #fc
(sample_rate*2), #bw
"ABS", #name
1,
None # parent
)
self.qtgui_freq_sink_x_0_0.set_update_time(0.10)
self.qtgui_freq_sink_x_0_0.set_y_axis((-140), 10)
self.qtgui_freq_sink_x_0_0.set_y_label('Relative Gain', 'dB')
self.qtgui_freq_sink_x_0_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, 0.0, 0, "")
self.qtgui_freq_sink_x_0_0.enable_autoscale(False)
self.qtgui_freq_sink_x_0_0.enable_grid(False)
self.qtgui_freq_sink_x_0_0.set_fft_average(1.0)
self.qtgui_freq_sink_x_0_0.enable_axis_labels(True)
self.qtgui_freq_sink_x_0_0.enable_control_panel(False)
self.qtgui_freq_sink_x_0_0.set_fft_window_normalized(False)
self.qtgui_freq_sink_x_0_0.set_plot_pos_half(not True)
labels = ['', '', '', '', '',
'', '', '', '', '']
widths = [1, 1, 1, 1, 1,
1, 1, 1, 1, 1]
colors = ["blue", "red", "green", "black", "cyan",
"magenta", "yellow", "dark red", "dark green", "dark blue"]
alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0]
for i in range(1):
if len(labels[i]) == 0:
self.qtgui_freq_sink_x_0_0.set_line_label(i, "Data {0}".format(i))
else:
self.qtgui_freq_sink_x_0_0.set_line_label(i, labels[i])
self.qtgui_freq_sink_x_0_0.set_line_width(i, widths[i])
self.qtgui_freq_sink_x_0_0.set_line_color(i, colors[i])
self.qtgui_freq_sink_x_0_0.set_line_alpha(i, alphas[i])
self._qtgui_freq_sink_x_0_0_win = sip.wrapinstance(self.qtgui_freq_sink_x_0_0.qwidget(), Qt.QWidget)
self.top_layout.addWidget(self._qtgui_freq_sink_x_0_0_win)
self.qtgui_freq_sink_x_0 = qtgui.freq_sink_c(
1024, #size
window.WIN_BLACKMAN_hARRIS, #wintype
freq, #fc
(sample_rate*2), #bw
"RTL", #name
1,
None # parent
)
self.qtgui_freq_sink_x_0.set_update_time(0.10)
self.qtgui_freq_sink_x_0.set_y_axis((-140), 10)
self.qtgui_freq_sink_x_0.set_y_label('Relative Gain', 'dB')
self.qtgui_freq_sink_x_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, 0.0, 0, "")
self.qtgui_freq_sink_x_0.enable_autoscale(False)
self.qtgui_freq_sink_x_0.enable_grid(False)
self.qtgui_freq_sink_x_0.set_fft_average(1.0)
self.qtgui_freq_sink_x_0.enable_axis_labels(True)
self.qtgui_freq_sink_x_0.enable_control_panel(False)
self.qtgui_freq_sink_x_0.set_fft_window_normalized(False)
labels = ['', '', '', '', '',
'', '', '', '', '']
widths = [1, 1, 1, 1, 1,
1, 1, 1, 1, 1]
colors = ["blue", "red", "green", "black", "cyan",
"magenta", "yellow", "dark red", "dark green", "dark blue"]
alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0]
for i in range(1):
if len(labels[i]) == 0:
self.qtgui_freq_sink_x_0.set_line_label(i, "Data {0}".format(i))
else:
self.qtgui_freq_sink_x_0.set_line_label(i, labels[i])
self.qtgui_freq_sink_x_0.set_line_width(i, widths[i])
self.qtgui_freq_sink_x_0.set_line_color(i, colors[i])
self.qtgui_freq_sink_x_0.set_line_alpha(i, alphas[i])
self._qtgui_freq_sink_x_0_win = sip.wrapinstance(self.qtgui_freq_sink_x_0.qwidget(), Qt.QWidget)
self.top_layout.addWidget(self._qtgui_freq_sink_x_0_win)
self.blocks_complex_to_mag_squared_0 = blocks.complex_to_mag_squared(1)
self.analog_const_source_x_0 = analog.sig_source_f(0, analog.GR_CONST_WAVE, 0, 0, (1*1e6))
self.adsb_framer_1 = adsb.framer(sample_rate, threshold)
self.adsb_demod_0 = adsb.demod(sample_rate)
self.adsb_decoder_0 = adsb.decoder("All Messages", "None", "Brief")
##################################################
# Connections
##################################################
self.msg_connect((self.adsb_demod_0, 'demodulated'), (self.adsb_decoder_0, 'demodulated'))
self.connect((self.adsb_demod_0, 0), (self.qtgui_freq_sink_x_0_0, 0))
self.connect((self.adsb_demod_0, 0), (self.qtgui_time_sink_x_0_0_0, 0))
self.connect((self.adsb_framer_1, 0), (self.adsb_demod_0, 0))
self.connect((self.analog_const_source_x_0, 0), (self.qtgui_time_sink_x_0_0_0, 1))
self.connect((self.blocks_complex_to_mag_squared_0, 0), (self.adsb_framer_1, 0))
self.connect((self.rtlsdr_source_0, 0), (self.blocks_complex_to_mag_squared_0, 0))
self.connect((self.rtlsdr_source_0, 0), (self.qtgui_freq_sink_x_0, 0))
self.connect((self.rtlsdr_source_0, 0), (self.qtgui_time_sink_x_0_0, 0))
def closeEvent(self, event):
self.settings = Qt.QSettings("GNU Radio", "adsb_rx")
self.settings.setValue("geometry", self.saveGeometry())
self.stop()
self.wait()
event.accept()
def get_threshold(self):
return self.threshold
def set_threshold(self, threshold):
self.threshold = threshold
self.adsb_framer_1.set_threshold(self.threshold)
def get_sample_rate(self):
return self.sample_rate
def set_sample_rate(self, sample_rate):
self.sample_rate = sample_rate
self.qtgui_freq_sink_x_0.set_frequency_range(self.freq, (self.sample_rate*2))
self.qtgui_freq_sink_x_0_0.set_frequency_range(self.freq, (self.sample_rate*2))
self.qtgui_time_sink_x_0_0.set_samp_rate(int(self.sample_rate))
self.qtgui_time_sink_x_0_0_0.set_samp_rate(int(self.sample_rate))
self.rtlsdr_source_0.set_sample_rate(self.sample_rate)
def get_gain(self):
return self.gain
def set_gain(self, gain):
self.gain = gain
self.rtlsdr_source_0.set_gain(self.gain, 0)
def get_freq(self):
return self.freq
def set_freq(self, freq):
self.freq = freq
self.qtgui_freq_sink_x_0.set_frequency_range(self.freq, (self.sample_rate*2))
self.qtgui_freq_sink_x_0_0.set_frequency_range(self.freq, (self.sample_rate*2))
self.rtlsdr_source_0.set_center_freq(self.freq, 0)
def main(top_block_cls=adsb_rx, options=None):
qapp = Qt.QApplication(sys.argv)
tb = top_block_cls()
tb.start()
tb.show()
def sig_handler(sig=None, frame=None):
tb.stop()
tb.wait()
Qt.QApplication.quit()
signal.signal(signal.SIGINT, sig_handler)
signal.signal(signal.SIGTERM, sig_handler)
timer = Qt.QTimer()
timer.start(500)
timer.timeout.connect(lambda: None)
qapp.exec_()
if __name__ == '__main__':
main()
